Hi have a few ports open on my computor because i am using rapide share .com they are taking my download speed how do i close them down?

Common network application protocols use "well known ports". For example, HTTP can typically be found on port 80 of the computer hosting a web server, SMTP (mail) on port 25 , telnet on port 23, dns on port 53, etc. (google for a list of port numbers and their related services). What is the reason for having well known ports?

who r u ?

On Tue, Nov 3, 2009 at 9:29 PM, QT - get <
qtopic-12-kEJgdn6FFtZ2b@quicktopic.com> wrote:

>
< replied-to message removed by QT >

another one can u explian layer two switch opration?

hello are u there? did u get my message?

can you show me one router diagram and one switch diagram?

Hello,
&#A0;
If you're my friend, then you'll probably have my new email address. Due to massive load of spam, I am keeping this email only for spam and other crappy things like that. If you know me and wish to have my new email, please do not hesitate to ask. &#A0;
&#A0;
Thank you,
&#A0;
Nico Stormchild
www.myspace.com/nuuh STRIPMIME_JOINLINES

how can i create my own domain

 what is the max limit of data size that can be sent along a TCP/IP port at a time.

Hello,
&#A0;
If you're my friend, then you'll probably have my new email address. Due to massive load of spam, I am keeping this email only for spam and other crappy things like that. If you know me and wish to have my new email, please do not hesitate to ask. &#A0;
&#A0;
Thank you,
&#A0;
Nico Stormchild
www.myspace.com/nuuh STRIPMIME_JOINLINES

please can u some one tell how to enable tcp port in XP
for example i want to activate port no 1044
so how to activate that because some design software from my pc using that port but it is showing error that ur tcp port 1044 not enable

send information on Abhijeet.Mane@kpitcummins.com
Thank You

deleteme

Hello,
&#A0;
If you're my friend, then you'll probably have my new email address. Due to massive load of spam, I am keeping this email only for spam and other crappy things like that. If you know me and wish to have my new email, please do not hesitate to ask. &#A0;
&#A0;
Thank you,
&#A0;
Nico Stormchild
www.myspace.com/nuuh STRIPMIME_JOINLINES

hi i wana know de protocol of DHCP

hello

bhag ja

enthernet port add

Hello,
&#A0;
If you're my friend, then you'll probably have my new email address. Due to massive load of spam, I am keeping this email only for spam and other crappy things like that. If you know me and wish to have my new email, please do not hesitate to ask. &#A0;
&#A0;
Thank you,
&#A0;
Nico Stormchild
www.myspace.com/nuuh STRIPMIME_JOINLINES

Hello I have a websight that I am starting and wanted to install a chat room so I downloaded the free trial to check it outso I downloaded it placed it in my sight and FTP'ed to my server only to find out that my hosting co. would not open the nessessary port,because it was a shared server so I then went with a dedicated server only to find out that I could not get it to work I have a windows OS-server 2003 Enterprize edition VD with plesk control panel does anyone know how to open or check a port it is there on my sight just not talking to the server Ive been trying this for days and can not seem to get it working any help on this issue would be greatly appreciated my sight can be veiwed at http://www.trubbles.com/tf_003.htm and the chat is at http://www.123flashchat.com/ thank you

I have installed a DVR (Digital Video Recorder) at a remote location away from my home.

I used the DMZ facility of a Belkin F5D7633uk4 modem/router at the remote location to set the IP address to reach the DVR.
 
At home I use my Internet browser to type in the real IP address at the remote location to see the DVR camera pictures. (static IP from my ISP). This works OK but now I cannot get to the router to carry out config/remote management etc.

I tried the normal OPEN PORTS facility on the router but could not get that to work..therefore I tried the DMZ as a last resort.

Any helpful comments would be much appreciated.
Thanks
Victor

hey i am having problem opening udp ports 500,4500,1701. for vpn server anyone kowning can answer on this chat

i found a problem about TCP/IP. TCP/IP not work properly.Please you give
me suggestion about TCP/IP.

 I am having problem with port, I received message that ,cannot connect to port 23

Hi,
I am having a controller with two ethernet interface where I can assign IP on different subnet.
For example
IP1:192.168.3.127
IP2:192.168.4.127

Now on the controller ,I want to run one application which will act as a server with Port No :30000 and at the same time I am planning to run one more application which will act as a Client with Port No:30000 ,but this client will connect to the server of 192.168.4.XXX .

Now my question is, whether this configuration is possible or not (Two different application with same TCP port ,can communicate with different range of host)? If yes how?

Thanks in Advance.
Amit

what does it cost to 'purchase' a port number for private use?

I have found a list of RDP parameters which can be written in a RDP file.
One of these parameter is "Transport Type". this parameter is used for passing protocol used for RDP connection.
But as I know RDP uses only TCP/IP.
So my doubt is why this parameter is specified. And what is the use of this parameter.

Please clarify my doubt and also provide some information regarding protocol used in RDP for data transfer.

Email ID: pranay.kumar@nechclst.in
 or pranaykumarcse@gmail.com

As you have probably noticed, I don't have much time to respond to all these questions. I hope that some of you will be able to help one another. Many of you are asking very detailed and specific questions that would be better solved by local technical support or experts. I'm sorry I no longer have time to address individual issues.

-- Richard Akerman
Webmaster, http://www.akerman.ca/

I would like to watch everthing that comes into the network card. Seeing how all the ports use the network card how can I watch it. Can I do this using winsock? e-mail daveandbelle@yahoo.com
Thanks

hi i wana tcp/ip poort for msn and yahoo messenger call vido coz this port not work 6891-6900
plz need site or smo thing 2 know tha ports
my mail is
riyad2008@hotmail.com

I have an astronomical observatory I run from the internet. I have several devices that I must control via the internet by assigning them ports and keeping the ports open to access the devices from the internet. I understand user ports are in the range of 49152 to 65535. How can I use ports in this range and keep my computer secure. I keep finding software loaded on my computer I didn't put there. Someone has obviously taken advantage of the open ports to put it there. Can I protect myself?

that's wskystalker@yahoo.com

Dear Sir's;
  Thank you for your Email ,i use popular Browsing port ,like
80.8080,and i wana know can our program contrlolling the
browsing by letting user only check E-mail like yahoo or MSN and
preventing this user from using program like chat program and
prevent the same user from using any type of download ,please
advice and give me an answe ASAP,with suitable protocol for this
issue and by the way can give me the way that i can prevent user
from using or entering site that containing live show or Radio
on line or anything like this. Regards

Dear Sir's;
  Thank you for your Email ,i use popular Browsing port ,like 80.8080,and i wana know can our program contrlolling the browsing by letting user only check E-mail like yahoo or MSN and preventing this user from using program like chat program and prevent the same user from using any type of download ,please advice and give me an answe ASAP,with suitable protocol for this issue and by the way can give me the way that i can prevent user from using or entering site that containing live show or Radio on line or anything like this. Regards,

QT - NEETI <qtopic+12-kEJgdn6FFtZ2b@quicktopic.com> wrote:



Mohammed Aljbory .
VSAT Engineer .
Mobile:+9647901362572 .
       
---------------------------------
Take the Internet to Go: Yahoo!Go puts the Internet in your pocket: mail, news, photos & more. < replied-to message removed by QT >

Edited by author 27-07-2007 06:14
WILL U PLZ SEND ME THE A ROUGH RANGE OF THE PORT NO.S TO BE USED AS A SOURCE PORT AND THE DESTINATION PORT ???

DO REPLY ME AS SOON AS POSSIBLE ..
THANK YOU

DO REPLY ME AT surakshachoudhary@hsbc.co.in

how does a file transfer softwares uses the tcp/ip protocols......
example software is the bittorrent...
thankyou
more discussion pls. mail me on asi_708@yahoo.com

Hello ,my question is that i use the program (Internet Lock version5.0.3) and i use it,i have some problem that i wana control the PC and prevent the user for downloading from the internet can help me by giving me the step or the port that is responsible for Download from internet to prevent the user from Download and to let him only browsing the net and checking E-mail only,
My mail is:Engmuha80@yahoo.com
I wait your Advice and Help
Regards,

Hi,

i tried connecting to a printer attached through moxa box.
i am using .net 2.0 for connecting. however the code doent seem to be listening at the printer end. The printer is simulater printer for barcode printing.
what port no should i use for connecting through tcpip socket.
Any help is appreciated.

hi I am unable to view my web cam, Do i need certain ports?

My chart server connects thru 9302 port but
when i telnet it the connection is refused.
How to resolve this problem
I am working on linux OS

My mail id is: shantala.daddi@gmail.com

Do tcp/ip ports vary in speed from one another? My intention would be to know which port I should use for example for torrent download programs to have the best possible speed if port numbers do make a difference in such cases.

Thanks for any help.

Edited by author 20-05-2007 11:05
could sombody tell me what is the specific port for MSN Messenger-Webcams ?
paulexe_mail@yahoo.fr

HI can you helpme with following questions
Thank You
 
Can two services use the same port?
 What happens if we try to run another service on one
of the (RIP,SMTP,SNMP,HTTP,POP3,FTP, TELNET, ......... ports?)

hi sir,
im studying network security,ive gotta explain this command..
[root@ilker]# nmap -sT -O -g 53 -p 1-65535 10.63.148.37

if u have any type of information regarding to this subject,please drop me an email.also just want to mention that specific information would be excellent.

thanks..

How to find our which port number for TCP/IP I am using on my laptop?

hi sir
how can i install or make tcp/ ip how can i make in betweem my both computer? can you help me please thanx

I would like to know what my ip port, for my computer, for a dell computer desk top computer with brught house

Edited by author 24-01-2007 02:04
dear sir
i want to write a program to implement tcp/ip using microcontroller HCS12 using C language
my mail id is prasannadurga@rediffmail.com
please assist
thank you

What port numbers can I use for remote desktop access. I have one pc using the 3389 now and what to setup another. I found I can make the change in the registry...but do not know what port to use?
Thanks.
ML

Hi,
I have a HP5N on port 4 of an SMC7804WBRA Wireless ADSL Router.
The IP address of the HP5N is 192.168.2.99.
I could print to the HP5N from the ACER Laptop prior to reinstalling XP Home [ACER Restore], and can print to the HP5N from the ACER Laptop via the other computers [3 off] when they are turned ON on the MsHome Local area network.
However I cannot print to the HP5N directly from the ACER Laptop, although I can 'ping' the HP5N from the ACER Laptop on 192.168.2.99.
When the HP5N was first installed the 'tech' did something unusual in XP Home - or the MsHome network that I did not note.
I think that he deleted some old HP 'drivers' but I cannot recall where or how?

PS: From another post I tried running 'net view' at the c:/ prompt and the HP5N does not show?

Thanks for your help. Keith H.

good after noon sir i'm creating a project on tcp/ip, so that i want to know what will be the containts.And give me a simple explenation on it.

Dear sir,
This is information you that whenever we are trying to send mail through outlook express , most of the time the following errors is coming
and mail is not going
.
The SMTP server returned an error. Account: '72.232.47.214', Server:
'72.232.47.214', Protocol: SMTP, Server Response: 'rblsmtpd: 59.144.140.118
pid 12712: 451 http://www.spamhaus.org/query/bl?ip=59.144.140.118', Port:
25, Secure(SSL): No, Error Number: 0x800CCC60

Kindly suggest the solution.

hello i have a nat problem with downloading movie,s the smily sty's red anytime plz send me some help on my mail

Hi

I want to know which protocal it support to DHCP server to assing ip to cilent.whats the backend procces.pls help me.

there any body know how to check the particuler port 1099 or 443 is open or not on our network ... any utility or command plz advice

i am useing trend micro antivirus and there is iwss proxy s/w and i want to block my all messenger which is runing onmmy network
plz advice

Hi,
I want to block all my ports in the system using Java code and similarly unblock them later.. is it possible? please help if u have any idea

Hi Friends,
           how can we use firewall in my computer
             please help me

I am seeing a significant amount of traffic on my network using TCP port 6. Discovering on the net that TCP port 6 is an unassigned port number led me to post this inquiry. Does anyone know common application using port 6? I am attempting to track down network issues, congestion basically. I am seeing the network flooded with TCP port 6 packets. Packet sizes range from 46 to 1420. It also shows individual hosts (I have 4 hosts doing this - thus far)on my network going to multiple hosts consecutively.

My concern is that there is some virus/malware out there that utiizes tcp port 6 to do its dirty work. I am not able to find much on the net about tcp port 6.

Any input is greatly appreciated!

Derek

i want to know about socket and relation between port and socket
i know socket is endpoint of communication and port are the protocol that application is internet use to talk between computre but describe more clear and simple for me?

Hi Friends,

How can we restrict yahoo messenger through firewall in windows xp sp2.

please help me

Heya!

I've been unable to create servers for various games (Neverwinter night, Starcraft, Warcraft 3.. Unreal, quake... ) Each time I create a server, no one can connect to me.

I've been trying to see if my ports are alright on my computer or if I could open the right ones. My firewalls and such are always close when I try to host a server.

COuld anyone help me on this matter, how can I scan my internet ports and see what's closed or how can I reset my port settings to default ?

THank you

Hello. I want to publish an application on internet, but i don't know what port i should configure on the web server. I dont know if i must use a port between 1024 and 49151 (registerd range) or between 49152 and 65535 (dynamic range) as the IANA table specifys. And into these ranges, i use an 'unasigned' port or otherone i prefer?

Thanks.

how to see ocupied port on unix??
how to reser port if it is ocupied by wrong program???

Good Afternoon. I am trying to get a client hooked up with a remote Exchange server. The client uses Comcast, and Comcast conveniently blocks ports 25 and 135, among others, that Outlook uses when trying to connect with Exchange server. Comcast has no way to unblock those ports. Short of using Exchange via POP or hosting the Exchange server in house, is there any way to use other ports to connect to an external Exchange server? If so, how do I change the ports in Exchange, since they don't provide any way to do that through the UI?

hi
   tell me how does the ports work on protocol.how protocol run on osi layer.

Edited by author 28-07-2006 00:15
Hello sir good morninig at present iam briefly preparing for internet notes in this situation i got the doubt how a port is defined and what is the overall function of the port how do you specify port number please tell me briefly with suitable examples.
please send me mail as soon as possible.

What's the port used by dc++ ? garant420@xnet.ro

what is the terminal srevices port number?

i want to learn what is the port of trojan i dont know of networking based only of my experience .my system is always hangging i use only the http port 80 to use the website i block my firewall and it can already be secure with other unregisterd port..tell me what is the example of the port

I need to have Yahoo Massenger Chatroom IP range( Iwant define it to my Router access-list for some users) . Please Help me.
ali.yashar@gmail.com

Edited by author 17-05-2006 17:37
What's the port used by dc++ ? garant420@xnet.ro

Hi experts, I cannot connect to the internet (through TP-Link wireless) few days before with a message "TCP/IP not yet installed". Besides, I cannot invoke ActiveSync to synchronize my pocket PC to my desktop PC with the similar message. I have checked the TCP/IP link at the internet setting of my desktop PC with a proper 'tick' already & the wireless receiver shows a strong singnal. I am using Window XP. Can U expert tell me how to solve this problem. Thank you very much.

Hi,can any one tell me through which port i'll checkout the extra sending and receiving bytes.Actually I m new in the field of networking and woking in network dept.....
PLZ help me out its a challenging task for me

Hi, Can anyone tellme the port numbers used by MetaCafe software...i want to block it in my network.....Thanks for your help

Hi, uhhh I'm trying to figure out how to open a port...port 4000 to be exact if it matters...how do I do this? Thanks in advance...

I was able to audio chat with a friend in Australia until about two months ago. BigPond is the ISP in Australia.

Do you suppose certain ports have been closed? We were using iChat AV 3.0 and now we can only text message.

Thank you.

how vlan works

Hej !

Jag har semester from 06-03-31 tom 06-04-09, åter i verkligheten den 10 April.
Vid akuta ärenden kontakta,

HÃ¥kan Nohammar, 0709-387447, hakan@cmldata.se,
Johan Nygren, 070-3662754, Johan@cmldata.se

Kontoret, 036-719526

Mvh,

Mattias Lindgren
CML Data AB

hi
   tell me how does the ports work on protocol.how protocol run on osi layer

Edited by author 25-03-2006 15:20
I am trying to send a request to google.com use its API To perform searching and to get back the results ....can someone .... provide me the port number used by google ..

amo be pir be peyghambar i just want to change my ip but dono how,is there naybody can help me?

IP TCP/ IP ports are open on your computer , do you think your machine is secure

Which port must be open for MS Defender to automatically receive updates

sarry i did a mistak in my previos post.i want to know about switch or switchig in application later of tcp/ip layer

hello sir.I want to ask you what is the swich or swiching in layer application in tcp/ip protocol.this an important question for me.thanks alot for your site.good luck

what is loopback address?

Regards to all
I heave a problem here!!??
I installed a win 2003 server with AD...(DHCP/DNS/RRAS).When I am installing a ISA server 2004,I can not make a VPN connection whith the server in HQ..Different kind of answer (reasons) for not making this question..One of them is that is not port dedicated for this qonestion is cllosed.....
Can somebody heave any proposal for this

Many thanks in advance
Bekimi

I want to know Is there is any need for Transport layer protocol that runs on top of IP multicast to define port numbers, the same way we have seen port numbers in TCP and UDP

I am having huge issues so maybe someone can help me out here. First of all I don't know if it has something to do with ports or what not. You'll have to forgive me I am kinda dumb with this stuff. I cant reply, compose, or even delete my emails in yahoo. The page is half empty when I sign in, and in Yahoo Messenger, I cant listen to the music. For that matter I cant listen to ANY music on the internet. I get error on page so much and I am getting super ticked. Hopefully you can lead me in the right direction.
LJ

Which port is used by MS .NET remote call? I need to setup firewall rule for it.

Thanks

Edited by author 28-01-2006 12:21
Error Report.How do I fix?Can't Listen on port 42951!Make sure the TCP/IP transport is set up correctly,How do I do this.

I am getting this error when trying to connect to Metaframe server 'The connection to the Citrix Metaframe server was interrupted' and I was told that to rectify this problem I have to open TCP port 1494 How do i go about it Please help

Hi,

can any one tell me what does this port is used..

tcp port 3144
& UDP 3130

I'm trying to load a printer on my 98 system and it wouldn't let my pick an TCP/IP port. It doesn't have that option. I even laod it as LP port a then go in to add a port from the printer properties but it doen't have that option when I pick other. It oly have Local and Acrobat.

Hi,

I want to create a new system variable and assign it to Free TCP/IP port.

How will I find which TCP/IP port is free?

My OS is Win XP

I can't answer your question, but I can add something. At one time, there was a second connection betweeen the two machines. SUN lost the connection, but UNIX doesn't know this. It is probably just sitting there, waiting for some incoming data. There is a setting on a tcp connection called "keepalive". This causes some out-of-band
communication to ensure that there is still someone on the other end. You might see about setting this on the UNIX socket.

QT - prashanth wrote:

>
>
< replied-to message removed by QT >

hi,
I have a connection between SUN and UNIX systems with tcp protocol.
According to TCP protocol, a connection can only be in the established state if there is a party on both ends of the connection. So, if there are two established unix connections on port 4021 (for example), there should be two established SUN connections on port 4021 too. However, that is not the case.

EG:netstat output on SUN
SUN.37481 UNIX.4021 ** 0 ** 0 ESTABLISHED

netstat output on UNIX
tcp 0 0 UNIX.4021 SUN.37481 ESTABLISHED

tcp 0 0 UNIX.4021 SUN.60587 ESTABLISHED


One of the above unix connections on port 4021 should not be in the established state since there is no corresponding connection on the SUN.

Please let me know what can be the problem and which part of the unix code might have a bug.

does anyone know howto block yahoo and msn messenger with kerio winroute firewall???

Does anyone know what port number is associated with Windows OS drive mapping? I'm trying to have our network group open this port number between two server and they would like to know what port number it is.

Thanks,

Dave

i installed tomcat apache server
but i am not getting http://localhost:8080 link
what may be the problem?

hi i need help

im trying to load an online game runescape. but it refuses to go to the login screen of the game cause it comes up with an error message saying i must open ports 43595 and 43594 for tcp traffic on my server (2000) can someone please explain how i open a port on ISA for this game. my email address is ydramat@hotmail.com

Hi,
We had an internal discussion at our company this morning , and couldn't reach a decision whether using X TCP client-server connection with the same port using are as much "robust" as using X/10 connection for a group of 10 different port each (e.g. the same amount of TCP connection spreads over 10 different ports).

hope anybody can spreak some lights here , thanks.

Edited by author 08-10-2005 07:44
Hello Everyone,
I want to block yahoo and rediff messenger port.
anybody have any suggestion to blocked these ports.
I have installed Postmaster for proxy and want to stop all the user to do chatting on yahoo and rediff messenger

Could someone tell the ports for Tiger woods 2005?

Hi

How can I add a port range using windows xp sp2 firewall(apart from individually adding each one in the range)in the excemptions?. and if this cannot be done is there an easy workaround to open these ports some other way?

Cheers

How to know which port is open in my PC?
I can use telnet to check TCP port but how about UDP port?

Hi my pc is sending out so many packets of data and its clogging up the network how do i stop it from doing this.

I am Masud Rana, I am from Bangladesh. I fall in some problem. I want to allow my PC for yahoo massenger but i don't want to allow chat room for my PC so what can i do for this work or what port i will block this work.

Please ASAP reply me... I am eagerly waiting for ur mail

/m363 ports questions

Different services in your operating system are assigned different TCP/IP ports.

Port 22 is SSH (secure remote shell).
Port 80 is HTTP (web).

Neither of the above ports has anything to do with email.
For email, port 25 is used, the service is called SMTP.

I'm new about this matter
I have some question about TCP port
what is mean of :
TCP port 22 open
TCP port 80 open
 can all that ports recieve email, why?
Thanks.

I have this message shown "The remote server is not a known TCP/IP host" when I tried to access my lotus notes mail at home. I don't have this problem previously.
Can someone help me on this ?

/m360 NET SEND port

See

http://www.akerman.ca/trojan-port-table.html#netsend

Hallo is anybody able to help me with my qustio???

Whitch port is used by command NET send (messenger)

Trying to use Altec Lansing AHS502i on Yahoo IM...Says I can't connect and need to open all outgoing TCP Ports 5000-65535. Can anyone tell me how to do this?

Anyone know what software uses port 1111 LM Social Server?

Please respond here and in email because I'll never find my way back. Thanks!!

bkrontz@esxinc.com

I am having difficulty sending mail through entourage and mac mail.
I receive mail intermittently.

I was using port 25, I just changed it to 587 today. To no avail. Comcast is my provider. They said my computer is corrupt, that there is no problem on their end. I called MS and they said there are no issues that they can tell regarding Entourage. I get error messages -111 and -17199 I have rebuilt the database, sent test messages that just stall out in my outbox, edit account, re-input the server names as well as account ID, created new identity. I am ready to pull all my hair out. Please help me. My alternate address maryrose_bailey@yahoo.com.

/m348 ports in use on Windows and Linux

My section on "software to list open ports" may help

http://www.akerman.ca/trojan-port-table.html#Protect-Portview

The commandline

netstat -an

is a good starting point on Linux as well as newer versions of Windows

/m353 unable to access gmail

It is extremely unlikely that you are blocked from accessing ports 80 and 443 if you are able to successfully use Hotmail and Yahoo.

Port 80 is just the "http" service.
Port 443 is the "https" service.

ANY website you access using http://www.example.com/ or https://www.example.com/ is using port 80 or 443.

The only case, which would be very unusual, in which another port would be in use is where there is a colon after the address, e.g. in the following example, port 8080 is being used:

http://www.example.com:8080/

So it is much more likely that there was a problem with gmail than that you have ports 80 and 443 blocked.

I suggest trying gmail again, it's possible it was just a temporary outage.

Someone has just installed a firewall on the home shared pc.

I am now unable to access the gmail site.
www.gmail.google.com

The error that I get is:
Cannot log into mailbox 12029
Unable to connect to server.

The other email accounts are accessed fine
Ie: hotmail and yahoo

On further investigation it appears that the reason why this is happening is because if the explanation below:
If you still receive this error message after following the above steps, your firewall or proxy setting might be interfering . Please verify that ports 80 and 443 are open, and that the Gmail is not blocked from accessing the internet in your firewall’s settings.

How do I do this as I have doe programming but am clueless when it comes to firewalls and networking

The operating system is Windows XP

If someone can please assist I will very much appreciate it.

I just need to open these two ports.

Correction on that the firewall that is being used is Zone Alarm

Any one know what port(s) you need to open on a firewall to allow a mapping to a shared drive on a server on the inside of the wall from a device on the outside?

Please add port 4444 to the list. AdSubtract popup and cookie-management software (local TCP proxy) uses it to talk to the browser.

=[ d

I'm not sure what you mean by "in use". Under Linux, an excellent command is nmap. This shows what ports are available on a server (or subnet). To find what ports are actually connected in Linux, try
"netstat -a | grep ESTABLISHED".

Carl Carstenson
Snowbird Systems
(512) 794-8334


< replied-to message removed by QT >

Good Morning,
  In windows and Linux, what command can I use to find what tcp/ip ports are in use. Thanks

Some applications seem to use different ports every time. Is it possible to allocate ports dynamically? If yes, who allocates the ports? Does the application have to specify a range for such a dynamic allocation?

Thanks in advance!

Khalid Ansari

Hi,

In UNIX Environment one port can we use for different services.I mean for different URL's. Please let me know.

Here are my e-mail id: jvs_prasad@yahoo.com

what is the value of source port and destination port when we access any web page.

How Do I check
1 . The router settings
2 . To make sure TCP Port 1723 and IP Protocol 47 (GRE) are opened.
3. That the router has the PPTP enabled and not firewall block the traffic.
4. the DHCP settings.

Thanks,

/m341 port 2869

Port 2869 is used for SSDP Event Notification (part of Universal Plug and Play - UPnP) for Microsoft XP SP2.

It is IANA-registered to Microsoft, but the name registered is ICSLAP.

See

http://support.microsoft.com/default.aspx?scid=kb;en-us;832017

and

http://support.microsoft.com/?kbid=886257&SD=tech

I have a small home network behind a LinkSys BEFSX41 Firewall Router connected to a cable modem. I also run ZoneAlarm on my system to catch unusual outbound traffic. This morning I started getting multiple inbound connection attempts reported by ZoneAlarm from the router IP (192.168.128.1) to my system to port 2869. I've not seen that behavior before. No other system on the network was powered on at that time. I changed the router default password when I first put it in and have remote administration turned off. Any ideas what's going on?

Century Tiny Term Terminal Emulation and SCO Vision Lite SQL Retreiver TCP ports used to operate through a firewall to connect to a SCO Open Server 5.0.6 using an Informix Standard Engine database? Please can you help me to identify which ports are actually being used so that the firewall can be configured to allow access externally for these two applications

salam

/m337 determine process using ports on Solaris

For versions after Solaris 8, you can use the "pfiles" command.

For other versions of Solaris, you will need to get the "lsof" command.

http://www.akerman.ca/trojan-port-table.html#Protect-Portview

I have a Unix box running Solaris that has a few applications running on it including CiscoWorks and a Cisco Syslog and configuration utility. I've been asked to track down what is using ports 51917 and 11351 but know very little about this and how to do this. Can anyone point me in the right direction?

/m334 ESP

You most likely are referring to the ESP *protocol* used by IPsec. Protocols run on the IP layer, they are different from ports. See

http://www.akerman.ca/port-table.html#Protocols

A less likely possibility is you mean SGI ESP HTTP

sgi-esphttp 5554/tcp SGI ESP HTTP
sgi-esphttp 5554/udp SGI ESP HTTP
# Vladimir Legalov [legalov@sgi.com]

This is the SGI Embedded Support Partner (ESP) web server.
Port 5554 is also used by the Sasser.B malware.

Edited by author 13-01-2005 09:08
/m333 mail server protocol

The main protocols used are SMTP, POP3 and IMAP4.
See

http://www.akerman.ca/port-table.html#email-ports

(This assumes you are not referring to an Exchange mail server. Exchange communicates using the above standard protocols, but also uses lots of Microsoft protocols to communicate with MS servers and clients.)

What is tcp port ESP?

Edited by author 29-12-2004 02:50
can any one tell me which kind of tcp/ip is used on mail server

does anybody know about w32.spybot.worm and download.trojan spread from which port ? B'cause i found that almost all user pc in my office infected by this viruses. I ever found a file (c.bat) and it will run ftp to get file called .pif and system.exe
if pc infected, it will run slow as a dog.
I will appreciated ...
anyway..happy holiday 2 u all..

can u plz tell me what do we exactly do in masking????

The ip address defines a host (although you can have multiple addresses on one host). A port is used for a specific service or application. A server might be hosting a web service (port 80) and an ftp service (ports 20 and 21). The same ip address is used for these two services. If a client wants to uses these services (e.g. your browser or ftp client), they connect to the proper port number at the host's ip
address.

Happy Holidays.


< replied-to message removed by QT >

can u plz anyone tell me what exactly the port number is needed for? and what's the difference between port number and IP address

hi ya can any one help me and tell me what a tcp/udp port is because for some reason mines stop working

I need any specific information on udp port 17707. Falls under RTP (transport protocol for real-time aplications. Appears to be P2P traffic. Any Trojan exploits know? The udp packets are so vast, they are affecting network. Please help! Thanks in advance!

please let me know which ports are used for network traffic blocking all other

/m309 add NNTP port 119?

My list is not intended to cover all standard ports.
You can use the IANA list for that

http://www.akerman.ca/port-table.html#IANA

Or you can contribute to the Wiki project to have hyperlinked descriptions of common ports.

http://en.wikipedia.org/wiki/List_of_well-...rts_%28computing%29

Network Sourcery also has an excellent, RFC-linked, reference to common protocols.

http://www.networksorcery.com/enp/protocol/nntp.htm

/m311 broadcasting TV over the Internet (in Canada)

I am not a lawyer.
In Canada, the regulatory agency, the CRTC, has decided not to regulate Internet broadcasts.

http://www.media-awareness.ca/english/reso...ad_act_internet.cfm

/m316 MSN Messenger Mac port

For text chat (IM) it uses port 1863, the same as the Windows version.

/m317 Yahoo Chat Room Port

I think it is the same port as for messages, 5050.

http://help.yahoo.com/help/us/mesg/use/use-17.html

Can anybody give me an information on the port that Visual studio uses when connecting to projects? This is kinda urgent...


Thanks

Mugs

udp 24.43.50.xx 1026 203.115.192.163 8889
udp 24.43.50.xx 1026 211.134.188.189 8889

Does anyone have any idea what this is?

The source ip is my firewall and the destiniation ip's are from numerious locations. The ports seems to be associated with

Desktop Data TCP 1 (TCP).
NewsEDGE server broadcast (UDP).

thanks

Hay How Are You Man i Want To Yahoo Chat rooms Port No:
Hope You Repply Me Thanks Alot

How can I know what port is used by MSN Messenger on Macintosh ?

how can I connect to a workstation over a workgroup network?

THANKS Carl Carstenson for your answer and i brachiated your reply.

smtp 25/tcp mail
smtp 25/udp mail
pop3 110/tcp pop-3 # POP version 3
pop3 110/udp pop-3
x11 6000/tcp X # the X Window System
I hope that I got them in the correct order!

< replied-to message removed by QT >

Please could anyone List me the services associated with the following TCP/IP port numbers in the correct order
Services
i. 25
ii. 110
iii. 6000

does the law regulates brodcasting films or regular tv by ip ports

i want know the port to connect to ir 192.168.1.13
by sub7

Hey I was reading through the list and I didn't notice the typical news server port, port 119 on there. Just wondering if it should be listed?

/m306 TCP/IP ports open in Windows

TCP/IP ports are service based. Various services will open various ports. There are therefore two ways to protect a system.

1. (preferably) Disable any services you don't need.
2. Use a firewall to protect any open ports.

You are mostly correct: "All TCP/UDP ports (for running services) are open by default on a Windows system without a local enabled firewall."

Disabling services or enabling a firewall is the only way to block these ports.

For built-in Windows firewalls, see

http://www.akerman.ca/trojan-port-table.ht...ct-Soft-Win-Builtin

For add-on software firewalls (mostly free) see

http://www.akerman.ca/trojan-port-table.html#Protect-Soft-Win

Are all TCP UDP ports open by default on a windows system without a local enable firewall installed!?!
If not is there a file where I can enable/add/change TCP / UDP ports!?!

hi all, when i start my computer i get a message that says, "tcp/ip not installed" where do i go to correct this. i cannot get on line nor check my email. if i do a restore i'm ok untill i have to restart my computer again. please help. thank you.

/m303 Kazaa with WinXP SP2

You can try the following:
1 add Kazaa to the Windows Firewall "program exceptions"
2 if that doesn't work, try specifically added port 1214 to the Windows Firewall allowed inbound ports
3 if that doesn't work, you may need to update your version of kazaa

See
http://www.akerman.ca/trojan-port-table.ht...ct-Soft-Win-Builtin

and
http://support.microsoft.com/default.aspx?scid=kb;EN-US;878485

I am having trouble with kazaa. For some reason and I can't connect and when I went to the help site it said something about port 1214 on my firewall needing to be opened up? And...I don't know how to do that. I am using windows xp SP2. Please help! Thanks

/m301 ports for Exchange

I assume that your Exchange server is outside your firewall.

Exchange is a mess.
You're pretty much stuck having to allow unlimited access in/out from your Exchange servers. The problem is that Exchange wants to have all sorts of RPC conversations with Outlook on dynamic ports.

There is Exchange ports info in the MS-RPC section of my site

http://www.akerman.ca/port-table.html#MS-RPC

Also note that the ports required for Exchange depend to some extent on the version you're using.

If your Exchange server is INSIDE your firewall, you probably have some other issues, for example you may have blocked the DNS ports, preventing needed name lookup services.

Hello,

I am trying to secure our internet from hackers and outside sources. I wanted to allow only the bare minimum of TCP and UDP ports. Everytime I try I can't access Exchange. What do you think the problem is, and what ports do you need to keep open? thanks

Thanks Richard,

I have now applied to IANA. Their question on op code threw me. It appears that their examples are based on FTP and based on the example all I could provide are the message types.

I presume they will email me if they have any issues.

I imagine I will still need to provide the facility to change the port as people will continue to cause conflicts.

/m296 net2phone

http://www.akerman.ca/port-table.html#net2phone

should give you a starting point.

/m297 port conflict

IANA is only organization for the registration of TCP/UDP ports, the registration applies globally, regardless of whether it is a LAN or WAN.

Unfortunately some organizations don't register with IANA, but it is the right thing to do, in order to reduce conflicts as you say.

G'day all,

Just recently I have discovered a conflict with VNC on port 5900 for my companies software. Now I used the port 5900 cause I knew it wasn't allocated to anyone (re: IANA).

The problem I have is that IANA is focused on allocation of ports used on the net. Our software is only used on LANS or WANS.

Should I go through the process to get two ports registered via IANA or is there a seperate organisation for LAN based port assignement?

I have noticed that VNC isn't registered via IANA.

I know this wont garentee any conflicts, but should hopefully reduce the posibility.

how do i get to know of the open ports for my net 2 phone software?
i require urgent help
thanks all

Dear All,

Could somebody help me ? When connecting my Unisys Source NDP Scanner on my network, it sends a message dealing with the fact that there is some applications which are using the same TCP 50005 port and the 500003 UDP port.

How can I change my scanner TCP port ? Is there a special command that can be applied at DOS prompt ?

Many thanks.

What detination port should be used for a VOIP application being used on a website that is also using IM?

can you tell the portno for nettelephon

Hi, I need a help. In our LAN it seems everybody is downloading Yahoo Messenger update, and it makes the connection to slow down. what ports should I block to let people to use the Yahoo messenger but not allow them to download things.

/m288 /m289 printer ports

515 is traditional LPR, but 9100 is common with HP

See the printer ports section of my page

http://www.akerman.ca/port-table.html#printing

I'm not sure where you got the port 515 information. HP print servers that I've worked with accept jobs on port 9100. HTH.

< replied-to message removed by QT >

I'm a little weak on TCP/IP and haven't bought the book yet. We're sending a printjob from a Unix server on port 515. When it gets to the firewall (or so says the FW admin), it is hitting it on port 9100. Why would the print job be on port 9100? We don't list that port in /etc/services on our servers. Proxy on a router? Something else? Thoughts?

i am trying to capture port 80 and port 25 message. but i cannot send mail using smtp

hi,
 am trying to configure a linux machine for internet browsing and telephony but dont want phone bandwith to chop into the browsing bandwith. plz can anyone help me out

kaazzman@yahoo.com

hi,
 am trying to configure a linux machine for internet browsing and telephony but dont want phone bandwith to chop into the browsing bandwith. plz can anyone help me out

Edited by author 31-07-2004 09:44
Hey
I'm desperate for MSN Messenger, but my dad refuses to let me have it unless he can control which computer the open port applies to.
He doesn't want to open the port 1863 for both of our computers as the threat of hackers is big, and he has important files on his computer. Please help! If you could find a way of opening the port for just my computer, I'd be extremely grateful

hi,
I want to understand why there is always open the application explorer.EXE named KIOSK WHICH USED THE REMOTE PORT 1061.
My personal firewall says it.
thanks for help
lorenzolegolas@yahoo.it

Can anyone tell me what udp ports in windows 2000 need to be open to allow me to access web sites as well as the ones required by windows to access lan shares?

I use tcp/ip filtering on my network card and if I block all incoming udp traffic I cant get on websites or my lan. I think I have the tcp part down.

Thanks for help

gungadin_stocks@yahoo.com

I would like to open Port:3050 which is used by Interbase Server. For some reason, my interbase server unable to open. Exausted all other options. Interbase suppose to start by itself from its server program called ibserver.exe / ibguard.exe. Pls help me
cheers

I've already found the book you suggested me in Amazon and I'll be visiting a local bookstore to browse some Perl books they have. It seems it's time to brush up my low level programming basic skills !! :-)
Again, thanks for your kind advise.
Regards.

I don't use Perl a whole lot, but I think it is fantastic. I don't know anything about Magic, but Perl is certainly not a 4GL. I think that Perl is very similar to C, but not so rigid.

< replied-to message removed by QT >

Edited by author 15-07-2004 12:26
Thaks a lot, Carl. I'm needing to craft the server side of the application; I have no idea about Perl, and I used to program in C more than 15 years ago!! Is Perl something suitable for someone who's just been programming in Magic (a 4GL RADD) and accessing Oracle tables for the last 10 years????

That is a pretty broad topic. Perl and C should be readily available for this. Are you just needing the client or server side of an existing apllication, or are you needing both sides? The O'Reilly book "Advanced Perl Programming" devotes two chapters to writing network applications. For C, a must have is "Advanced Programming in the Unix Environment" by W. Richard Stevens.

< replied-to message removed by QT >

Can someone tell me what can I do to handle a TCP port as a sequential device, which I can read and write to, under Linux?
I mean, what should I use to write a script or program to work this way?
Thanks a lot in advance!

/m271 /m272 /m273 how do i open port X on machine Y

I covered this in message /m262, viz.

Contact your Internet Service Provider (ISP) for support.
Ports may be blocked at:
- your computer
- your home Internet connection
- your ISP's network
- the destination ISP network
- the destination home Internet connection
- the destination home computer

On your Windows computer, the only thing that can be preventing ports from being accessed is a software firewall. By default, all of your ports will be open. In Windows XP this will change in Service Pack 2, which will enable the built-in Windows Firewall by default.

The bottom part of

http://www.akerman.ca/trojan-port-table.html#Protect-Soft-Win

covers the various built-in Windows firewall capabilities. However you probably don't need to touch these unless you deliberately turned them on. They are off by default.

You may also want to use software to view the ports that are open on your computer, you can find various programs to use at

http://www.akerman.ca/trojan-port-table.html#Protect-Portview

Hi Hi Hi,
         When ever i transfer or receive files in msn messenger "it will say that i need to open Ports from 6891-6900" but i don't know how to open it.Can you teach me???
And also i'm using Windows 98,if can't open those ports in Windows 98, do you have any more idea how to open it???
               
                    "hunchengli@hotmail.com"

Hi all,
This maybe a stupid question for you boffs. I require port 2001 on my xp machine to be opened. I need it for av eScan. All other pc's are fine only mine - I would hate to do a recovery. CAN ANYONE HELP - I need to know how to open port 2001 on my machine .!!!! Appologies if this sounds very stupid. naresh_sa@yahoo.com

I'm using winME and I dunno where to add all these ports...can anyone tell me? For example emule...they asked me to 'add port' but how?

Does anyone have experience with MTS TestStar II? I'm trying to set up a data accqusition program using LabVIEW, but I need the TCP port number to use VISA commands. MTS refused to tell me the port number, but they said I can purchase their pre-written LabVIEW VI's (for $30K). Is there any way I can get around this, or determine the TCP port number another way? Also, the MTS controller is not VXI-11 supported. Thanks in advance...

/m267 open ports

Open for incoming connections? Open for outgoing connections?
Open to do what, from where to where?

I'm wondering how can I find out whether a port is open? I was given 3 ports: 2427 TCP/UDP, 16384UDP and 32767 UDP and asked to verify if they are open...but I have no clue how to do this! Can anyone help me?!

/m265 BitTorrent ports

BitTorrent uses TCP (only) 6881-6999

QuickTime 4 and RealAudio/Video use ports in their range, but only UDP ports.

So if you only block TCP that should be ok, unless you use one of the following IANA-registered services

# 6851-6887 Unassigned
muse 6888/tcp MUSE
muse 6888/udp MUSE
# Muse Communications Corporation
# [howard@muse3d.com]
# 6889-6960 Unassigned
jmact3 6961/tcp JMACT3
jmact3 6961/udp JMACT3
jmevt2 6962/tcp jmevt2
jmevt2 6962/udp jmevt2
swismgr1 6963/tcp swismgr1
swismgr1 6963/udp swismgr1
swismgr2 6964/tcp swismgr2
swismgr2 6964/udp swismgr2
swistrap 6965/tcp swistrap
swistrap 6965/udp swistrap
swispol 6966/tcp swispol
swispol 6966/udp swispol
# Yutaka Ono [ono@saint.nm.fujitsu.co.jp]
# 6967-6968 Unassigned
acmsoda 6969/tcp acmsoda
acmsoda 6969/udp acmsoda
# Daniel Simms [dsimms@acm.uiuc.edu]
# 6970-6997 Unassigned
iatp-highpri 6998/tcp IATP-highPri
iatp-highpri 6998/udp IATP-highPri
iatp-normalpri 6999/tcp IATP-normalPri
iatp-normalpri 6999/udp IATP-normalPri
# John Murphy [john.m.murphy@mci.com]

Richard, you are a wealth of info. Thank you!!!

My question is - My company is (probably illegally) using bit-torrent for file sharing (I think anyway), I know this because browsing my checkpoint firewall I see the ports being used. The VP of infrastructure(boss' boss) wants to close these ports. Do you know of any other app that uses the same ports??? I don't want to block legit traffic to/from my company.

I couldn't find any info on it but I thought I would ask. Thanks,
Lee

/m263 ports for FTP, HTTP, TELNET

The IANA list provides the port numbers for all basic services.

http://www.iana.org/assignments/port-numbers

FTP is a bit of a mess as it uses two ports, 20 and 21, plus traditionally it would want to use randomly chosen ports for the data stream.

HTTP is on 80 but that is a privileged port, so also commonly on 8000, 8080, 8888 etc.

TELNET is on port 23.

what are differnet port addresses used commonly for FTP,HTTP,TELNET

/m260, /m261 how do I get port(s) X

Contact your Internet Service Provider (ISP) for support.
Ports may be blocked at:
- your computer
- your home Internet connection
- your ISP's network
- the destination ISP network
- the destination home Internet connection
- the destination home computer

Edited by author 30-05-2004 04:53
I need help. I don't know anything about PC or any ports etc... I just wanna play "CounterStrike: Condition Zero" online, but I can't connect. Someone said that the following ports must be "open":
UDP 1200
UDP 27000 to 27015 inclusive
TCP 27030 to 27039 inclusive
 
But How do I do that?
I use Windows XP. Please e-mail me! (lucianang@sbcglobal.net)

how do i get port number 4 bt broadband anyone

/m258 Yahoo Games, ccproxy

I don't know how to resolve this problem.

please can someone help me i am connected to the internet via my husbands broadband but i cant get into yahoo games i got through ccproxy anyone know how to resolve this problem i would be very grateful for any help :)

/m253 /m254 /m255 blocking a port or IP address

You can do this either using network hardware

http://www.akerman.ca/trojan-port-table.html#Protect-Hard

or by using a software firewall

http://www.akerman.ca/trojan-port-table.html#Protect-Soft

In UNIX/Linux you would do this with access control at any of a number of points in the system - xinted, iptables, ipchains, pf, portsentry, pam etc. etc.

/m252 unable to connect

I can't resolve this problem, you need to work with your ISP.

I got a scan of my computer ports from Symantec Security Check. The answer is that the ICMP Ping is open. How do I close that? Thanks for read/answer

How do i block a TCP Port?????????

hey there.
i have made one of my computer as internet server by installing winproxy on it, however every thing was fine when i came to know that one of our collegue is using internet without authorising him or giving him the permission (internet connection).
he uses ANALOG-X(proxy software) on one of our client machine and with the help of that client machine and analogx proxy server he is able to use our internet server.
he uses the port 6885 for internet connection.
pls give me some fix how should i stop him from using this port, i have used couple of software such as PORTBLOKER and PORTMAPPER from analogx(company) however non of the software was able to solve my problem.
Its gone be great if u will help me with this problem.
waiting for ur reply.

i am using a p2p file sharing program emule. when i try to connect to a server, it says that my 4662 port is not reacheable or any other port for tht matter and asks me to review my network config. due to this i have really slow download speeds.i guess am under a firewall as my connection is a cable one. the isp guys dont know jack... is there any way to get around the firewall ? thanks in advance ...

/m249 Please read message /m90 for "what is a tcp/ip port?"

hi.. this is going to sound... a bit... amateur amongst all you pros... but.. what exactly is a tcp port!?... cause .. i am experiencing really slow file transfers, and it told me to open lots of tcp ports, ... can someone please help me?!?...

/m245 preventing Windows from binding to a port

You should find out what applications are bound to that port.
You can use tools from my information on Software to List Open Ports

http://www.akerman.ca/trojan-port-table.html#Protect-Portview

Beyond that you are getting into the realm of Windows startup and programming.

/m244 ISP blocking port

I agree with your theory that your ISP may be blocking the port.
You should try contacting their support.

Is it possible to prevent windows2000/XP (winsock) to
give the port to some client application if I would like to use this particularly port for my service program (listener). My service/listener program could start long time after machine start and some time it happens that port is already in use! Port number is 5015.
 Thank you!

hi i need open tcp port 13000 of one aplication.
I have 2 pcs in diferents towns, conective whit adsl (fixed ip).

into my land the conection to port 13000 works fine, but when I work in internet the conections not is posible.

in both i disable the firewall of windows XP
I try changing the port, but its imposible.

my isp have one firewall ?

/m238 tcp port assignment

Each TCP connection is actually a host:port PAIR.
source host:source port to destination host:destination port

Every TCP packet sent contains both the source and destination information it its "envelope", the TCP header.

You can see this table in many different operating systems by using the command line

netstat -an

This information is provided in the Port Viewing section of my home broadband security page

http://www.akerman.ca/trojan-port-table.html#Protect-Portview

So lets use the example of a web server. This can accept large numbers of connections on port 80. So you would typically have a service listening on port 80. That port is essentially a fixed rendezvous point. We're saying "by convention, if you want to connect to an HTTP server, send a packet to port 80 on the destination machine".

So the next part is, how does the web server distinguish between all of the incoming connections? It will use the source host:source port pair to identify each connection uniquely. When you make your connection, your computer's operating system (its TCP stack specifically) will choose an emphemeral port, a temporary port in the range 1024-65535, to be the source port for your connection.

so e.g. you would have

192.168.1.1:1033 (your source IP address, source ephemeral port 1033)
connecting to
10.0.1.1:80 (destination IP address, standard HTTP port 80)

I also recommend reading Chapter 5. Transport Layer Protocols, Section 5.1 Ports and Sockets, from an IBM RedBook about TCP/IP

http://www.redbooks.ibm.com/redbooks/GG243376.html

You can find additional resources in the Understanding TCP/IP section of my TCP/IP ports page

http://www.akerman.ca/port-table.html#Understanding

Yes, DB, I would agree that this is "reasonable". A client app can do just about anything its programmer told it to do. This could include keeping a table of ip addresses and which processes connect to which ip. My question is how does it get its initial ip addresses?

Anyway, you will probably be getting over my head for anything past this point. It no longer becomes a networking problem. To network, a client simply needs an ip address (or host name) and a port. The server at that ip address will be "listening" for a connection to that port.

Ok, I think I get it. How's this sound? Reasonable?
When a connection is requested, the TCP stack stores perhaps the WindowsPID, the Connection IP Address and then maps the port.
If multiple sessions are active, the TCP stack is responsible for routing packets to the calling client.
Each TCP 'session', if you will, is responsible for passing packets to and from the host.
If you have opened port 2150 from your pc to 3 ip's, 1.1.1.2, 1.1.1.4, 1.1.1.7, then the TCP stack knows what packets go with which client app.
Does this sound reasonable?

Reply to DBenson:

The answer is that it doesn't. Ports don't "know" hosts. Hosts know ports.

One of two things are happening to you. Either host 1.1.1.50 also has a server listening on port 2150, or your client app is still communicating with 1.1.1.45.

Question regarding tcp port assignments in windows:
I have a database client app that connects via a port defined in the 'services' file of my windows2K box.
Lets say this connection is using port 2150/tcp connecting to 1.1.1.45.
Now I open the same application to a differnt host, 1.1.1.50, and utilizing the same port, 2150/tcp, I can run both applications at once.
How does the port assignment work in this manner? How does the port know what host to send packets and request to?
thanks...
dbenson@mycfs.com

/m235 is UDP port safe if TCP port has known trojan?

It's an interesting question.
The short answer is, it would depend on the trojan.
Some of them use exclusively TCP for communication. Others may use both TCP and UDP.

It's important to understand the trojan concept though.
A trojan is some code running *on your machine* that accepts connections on a particular port, or makes outgoing connections on that port. The best solution then is to simply remove the trojan.

The port that a trojan uses for communication is not necessarily related to the attack vector(s) it used to get on your machine.

So just because e.g. Skun uses TCP 107, that doesn't mean it is unsafe to have TCP and UDP 107 open. It just means you should have good security measures to 1) prevent your systems from getting trojans in the first place and 2) detect trojans if they do get on your systems.

In general, the best security policy for a firewall is to fireall - block all ports except a small number needed for your business processes (e.g. web, email).

/m234 port 2326 IDCP

IDCP is InterDAQ Control Protocol.
It's from a company called KGC in Japan.
The page (in Japanese) is at
http://www.kgc.co.jp/products/interdaq/idcp.html

The registered email associated with the port is
Keisokugiken Corp. <adda@kgc.co.jp>

If a TCP port is vulnerable to a known trojan, would it poses a security risk if I open its UDP port?

For example, port 107 (TCP) has a known trojan "Skun", is there any risk if I open port UDP 107? Please advise. Many thanks.

udp port 2326 - IDCP.
What's this mean? Where can I find information regarding IDCP?
When program use udp port 2326, what's the purpose?

We have a firewall, but every port IP are blocked. I need to chat but i don't know which port we have to free.
Thanks

I just want to block open ports in Windows 2000 server infrastructure , and as i blocked the ports we faced a problem that the servers services were also blocked.How can i know which port i have to open and which one to close.The Infarstructure contains Domain Controller, DNS, Exchange, Proxy.

Edited by author 09-10-2003 03:30
i should add that it is on the PC's ports because my other pc's can still access the internet.

i have an xp pro machine and all of my tcp/ip ports are all closed or blocked and i want to open them. how do i open them to acess the internet.

I am absolutely frustrated trying to look for information
on how to figure out who is blocking a port on one of our
servers in another country.

ISPs at both ends claim that they are not blocking the
Windows File Sharing port 139, however I am unable to access
this port although I am pretty sure that the port on the
destination server is open because I can connect to it from
other countries.

Could you pls. tell me how do I figure out where is the
port being actually blocked ? Is there a way to do something
like a TRACEROUTE on a TCP port ?

Would greatly appreciate your help.

/m226 HTTP ports

It's probably useful to mention that port numbers are only recommendations. Anyone with root or administrator access can put any protocol on any port. The only way you could really be sure would be to filter at layer 7, examining the packet contents to see if they were part of an HTTP session.

That being said, common HTTP ports are 80, 8000, 8001, 8080, 8088, 8888...

If you also want to filter HTTPS you should include 443.

As I have said before, if you're trying to e.g. prevent internal users from accessing the web, the only way to do that enforceably is through written organizational policy. Otherwise they will just find a tool that goes around your blocking, e.g. they might point at a proxy service on port 3128 that would then allow them to access regular websites.

I'm trying to configure a server based web filter..it filters only /all http traffic... What ports should I include for filtering?

/m224 virus on computer

This is most likely the W32 Blaster Worm at the current moment.
I have specific links on that at

http://www.akerman.ca/blaster.html

In particular the Microsoft and Anti-Virus pages give guidance on clearing up this problem.

In general, to block specific TCP and UDP ports, you will need a software or hardware firewall.

There is more information on software firewalls for Windows (including the built-in firewalls in newer versions) at

http://www.akerman.ca/trojan-port-table.html#Protect-Soft-Win

and a small amount of information on hardware firewalls at

http://www.akerman.ca/trojan-port-table.html#Protect-Hard

I am running windows xp and have cable as an internet provider. I recently received a virus on my comp and all the info I have read says to block specific TCP's and UDP's from my comp but I have no idea how to do this...

/m221 MSN Messaging 6

Obviously the first test is to see if MSN Messaging works with the Sygate firewall disabled. If it does, then you should contact Sygate support to see what configuration they recommend to support MSN Messaging.

If MSN Messaging still doesn't work, you should try asking for help in the USENET group microsoft.public.msn.messenger

http://groups.google.com/groups?&group=mic...ublic.msn.messenger

You should also check with your ISP support to ensure these applications are supported, although it would be a bit unusual if they weren't.

You might also want to check out the Messenger support resources at

http://messenger.jonathankay.com/

I am not aware of any differences in firewall behaviour between earlier versions of MSN Messenger and version 6 other than it is supposed to be more aggressive about trying to get through firewalls.

In addition to my last message I am running Windows 98SE and my ISP is ntlworld

I have Sygate installed and I am attempting to download and enable MSN Messaging 6. After downloading I don't seem to be able to sign in as it says I am not connected to the internet when I am. Also I do not seem to be able to send or receive files via Yahoo messaging although I can chat. What should I do to rectify these problems please? I am almost a complete novice
Help and thanks

/m219 "how do I open a port"

I have no idea.
It depends on your operating system, your local network (routers, firewalls), and your ISP.

Without any of that information, there's no way to answer the question.

How do I open UDP 138 port

/m204 SoulSeek

port added

/m212 what ports are open, what ports should be closed etc.

Without a security framework, focusing on open and closed ports is not really ideal, but it is better than nothing. You should be checking enterprise-class security resources and training.

I have some information on port security, but it is really targetted at consumers using broadband.

Anyway, you can see a list of services to remotely scan your machine for open ports at

http://www.akerman.ca/trojan-port-table.html#Protect-Scan

just after that is a list of tools that you can run locally on your machine to see what ports are open

Neither of these is going to help you much if you don't know what services (and hence what ports) you need to have active.

Some of the other material on the above page will give you pointers to other guides and books to get you started on learning about securing your systems.

/m212 Exchange Server security

There are several aspects to a defense-in-depth security strategy. First, at the edge of your network, you should have a firewall installed and properly configured. Second, on the Exchange Server there should be a host-based (software) firewall installed and configured. Thirdly, the Microsoft Windows operating system should be up-to-date with all relevant security patches. Fourthly, the Exchange Server should also have all relevant security patches applies. Lastly, the Exchange server configuration itself should be modified with security in mind.

Each of these, as you can imagine, is quite a complex security task in itself.

You should start by
1. familiarizing yourself with general computer security principles
2. getting specific knowledge / training on Exchange security specifically

For the latter, go through all of the material on the Microsoft Exchange Server Security Center

http://www.microsoft.com/technet/treeview/...ailexch/default.asp

You should probably also contact Microsoft support and have them assist you with basic security measures for your server.

/m207 reconfigure a firewall

Again, there is insuffient detail for me to be able to answer that question. What firewall? What application? For what purpose?

/m206 music on hold (MOH) in VoIP Telephony via Checkpoint NG

I would need to know the specific VoIP solution being used. In any case the VoIP vendor and/or Checkpoint would be better technical support starting points.

/m205 TCP port 6346

In order to answer this question, I would need to know much more detail. Open it in Microsoft Windows? Open it on a router? A firewall? In any case, for any of these systems, the technical support for the particular system would be the best place to start.

This is all somewhat new to me. There must be a port open on my computer because my exchange server is filling up with spam that is not be sent from or too anyone in the company. How do I find out what ports are open on my server, and if you are feeling very helpful, how do I close any that should not be open, if there is even a way for me to know what ones should and should not be open. Please help, any comments would be greatly appreciated.

/m208 MS SQL ports

I list the MS SQL ports 1433 and 1434 in the dangerous ports section of my broadband security page, due to the significant security risk posed by opening them.

http://www.akerman.ca/trojan-port-table.html#danger-ports

I have read your list of TCP ports and would like to suggest adding tcp/1433 for MS-SQL Server SQL request. This is the port that applications or ODBC sends requests for the SQL server. The reply goes to a dynamic address on the client machine.

Hello!

Anyone knows how to reconfigure a firewall that allows connection to tcp/ip ports 7000-8000?

Hi,

Anyone know how to allow the music on hold (MOH) in VoIP Telephony via Checkpoint NG.It allow to call in but if the Hold button is pressed it disconnect the converation.

Regards

Joel

How do I open TCP port 6346?

Edited by author 17-06-2003 04:38
Hey, just thought you could add port 2234 which is used by Soul Seek.

cheers, Jamie

/m202 block streaming audio

If you are in charge of an enterprise firewall, the way to block stream audio is...

to have a policy that there should be no streaming audio used by your users.

You will never be able to enforce a denial of any particular technology through purely technological means. Users treat service blocks as damage and route around them. If you block program X, they will use program Y. It doesn't help that now many applications actively seek holes in the firewall, first trying their designated port and then falling back on HTTP web port 80 as a last option, since almost everyone has port 80 open for web access. You can try blocking the destination addresses, but there are ways around that as well.

You could try asking in comp.security.firewalls

http://groups.google.ca/groups?&group=comp.security.firewalls

You could also try

http://directory.google.com/Top/Computers/...l_1_Resources/?il=1

and

http://www.geocrawler.com/lists/3/Security/98/0/

I don't know of a complete list of ports and destination IPs to block, although it is a bit surprising there isn't one.

How can I block streaming audio? Is there a complete list of ports that I could block via access list on the router or block using checkpoint?

/m198 port number of MSN

For information about MSN, try asking in
microsoft.public.msn.discussion

http://groups.google.com/groups?&group=mic...blic.msn.discussion

/m199 ethernet wire

That question doesn't mean anything in this context.
It appears you may be asking a question about hardware ports. I'm not sure.

What it the port number of an ethernet wire directly from the modem to the port?

what is the port number of msn?
if not then help me understand this

/m196 service running on a port

It depends how active or passive you want to be.

You could use network sniffing software like tcpdump and Ethereal to watch just traffic to and from port 25 on that particular machine on your network. Examining the communications should let you determine what protocol is running, or at least allow you to eliminate most common protocols.

If you want to be more active, you could use nmap or nessus and have it scan that particular port only on that machine.

The easiest way however would be to just log on to the machine and see what process is attached to that port. For this you can use software to list open ports

http://www.akerman.ca/trojan-port-table.html#Protect-Portview

If i know that a port is open on one of the machines of our network, lets say 25. Its not a mail server, so we know that its possibly another service running on port 25 to reduce chances of discovery. Is there any software that will probe that listening port and tell me what service is running. If you don't know of any please say 'i don't know'. I've had too many people saying, telnet into it and if its a pop3 server, the headers will tell you...
i know that.

/m193 pcAnywhere

That's actually two separate questions:

1. What ports does pcAnywhere use.

For that, go to my TCP/IP port table

http://www.akerman.ca/port-table.html#pcanywhere

2. How do you configure your router to open those ports.

For that, check the documentation for your router.

I am trying to configure a computer to use pcAnywhere and I have to open certain ports on my router. Any help to tell me where to start would be appreciated.

Edited by author 01-05-2003 13:02
/m191 port 80 open on my machine

There are many ways to do this, one of which is software you run on your machine to list open ports

http://www.akerman.ca/trojan-port-table.html#Protect-Portview

The above tools assume that by "open", you mean "in use", i.e. there is an application (or process etc.) listening on that port.

I need to find out if TCP/IP port 80 is open on my win2k pro machine. Is there an easy way to find this out? Thanks!

/m189 performance

I don't know.

Try

http://groups.google.com/groups?hl=en&lr=&...microsoft.public.vc

http://groups.google.com/groups?hl=en&lr=&...microsoft.public.vb

I am running two applications built in VC which are communicating via TCP/IP on 80 port. They are processing with 1.5msg/sec. But when I run the applications (built in VB) using HTTP they are processing 3 msgs/sec.

Actually the applications which are communicating on TCP/IP should process more.. Can you tell me what may be the problem. There is no problem in the applications :)

/m187 Medal of Honor Allied Assault

According to

http://www.codegoat.com/lanage/guides_servers_mohaa.php

the main two are

UDP 12203 MOH Default Server Port *
UDP 12300 GameSpy Monitoring Port *

but you can read on that page there are also quite a few others you may want to open as well if just those two don't work.

Both of these ports are in an IANA unassigned range.

does anyone know the ip-port for the EA game Medal of Honour Allied Assault???

thnx in anticipation

/m185

Thank you
Mendel

Edited by author 10-04-2003 12:57
/m184 lpr/lpd

lpr/lpd uses port 515

printer 515/tcp spooler
printer 515/udp spooler

Port for lpr/lpd printing.

I need to put a Intel Netport print server behind a NAT router and I want to use port forwarding to allow printing to that printer.

I can't find which port is used for that. I looked through the iana list and there are number of print related ports. which one is used by lpr/lpd?

/m159 MSN chat and ISA

Try one of the Microsoft support groups

http://groups.google.ca/groups?&group=microsoft.public

specifically the isaserver or isa.* groups

http://groups.google.ca/groups?hl=en&lr=&i...ft.public.isaserver

http://groups.google.ca/groups?hl=en&lr=&i...icrosoft.public.isa

/m162 DLink and ICQ file transfer

Try the DLink forum at DSLreports

http://www.dslreports.com/forum/dlink

/m164 port 12764

I don't know what service uses this port.

/m165 ports 63744, 63745, 63746

I don't know what services use these ports.

/m168 Yahoo Messenger - Voice

For the ports needed, see the appropriate section in

http://www.akerman.ca/port-table.html#Table

/m170 ports 8220 8814 9631

This may be the pattern for a variant of a particular SMTP trojan.

It sits on the victim's machine and is used by a spammer to send out junk email.

The SMTP mailer identifies itself as "jeem.mail.pv"

See

http://archives.neohapsis.com/archives/postfix/2002-11/0727.html

Symantec calls it "Backdoor.Jeem"

http://securityresponse.symantec.com/avcen.../backdoor.jeem.html

McAfee calls it "Backdoor-AML"

http://vil.nai.com/vil/content/v_99793.htm

/m173 port 5100

There are no major security implications to opening port 5100.

Also see this thread from comp.security.firewalls

http://groups.google.ca/groups?&th=bfad427...sonic.net&frame=off

Edited by author 31-03-2003 09:23
/m174 IP messages

If you mean Microsoft NET SEND popup messages, it uses RPC on port 135, or in older versions the regular NetBIOS ports 137-139, 445.

See

http://www.akerman.ca/trojan-port-table.html#netsend

Hi guys!

does anybody know which port is used for those annoying IP messages?

Hi,

Just want to know the implications of opening Port 5100 for Yahoo Webcam facility. Can someone help me to know the problem if any that could be encountered.

yahoo.msn.

my friend's isp suspended his service for using ports 8220, 8814, and 9631. they are unassigned ports according to iana listings. what's up?

Edited by author 27-01-2003 10:07
If anyone can help: I need 2 things for a guidence source(uncopyrighted) on 1.) The Primary IP Ports used by Web Servers and the programs that use them. 2.) Compiled list of IP Port numbers used by Trojan Horses, Hackers, and Backdoors that would leave your computer volunerable...


I need this information as of 31st of January 2003: for USF homework-reports

Please and thank you send it to my email: or the links to where I can gather the data: Thanks!!


My email addy is lil_romeo_poet@yahoo.com

hi
i use isa server
i have not voice in yahoo messanger
bye

gi_topogigo@hotmail.com

How can I (in my house) create a TCP Port? I have a small net with three computers, all three have the same IP for internet. So At least one of the three I can make a TCP PORT and the IP of my computer is the same that the IP of Internet ...How ??

Hi

i have a NAT configuration
some station use these ports (63744-6)
which protocol use these ports ?

thanks

Hi Guys -

I have an application that normally rquiresx pport 8999 to be open to work. On a squid server, the application would not work until port 12764 was opened - can anyone tell me what port 12764 is used for?

I have a rh based firewall and will using citrix. The firewall based on ipchains. I have forwarding port 1494 and 1604 and get a request retourn at testing the connection with telnet >>fw-ip 1494<< as ICAICAICA...and so on, but the citrix client does not work. Now i have reading that citrix used dynamic ports 1023 above. How i can realized dynamic port forwarding on my firewall for citrix, especially for the one ip of the citrix-server?
Have any a idea?

I want to enable file transfers on ICQ and need to know what port settings to use for my DI-614+ router....I am new to this and need to know either what settings are necessary or where I can find the information

MY QUESTION IS
I USE (ISA)SERVER IN MY NETORK I TRIED TO CONNECT TO CHAT.MSN.COM BUT ICAN'NT, ANY ONE GIVE ME THE MSN CHAT PORT SO ICAN CONFIGURE IT IN MY ISA SERVER TO START CHAT.
THANKS

/m157 webcam

There isn't enough information for me to answer this question. Really, as with all "I want to get through my office firewall" questions, my answer is: talk to your office firewall administrator.

Hello, I am trying to view my webcam from outside my office. My office has a firewall. Is there a way that I can view the web cam without using Netmeeting or any of those programs. I want to use it like a webcam with a built in web-server. Can you please recommend software and steps that I should use in order to make this happen.

In addistion to this forum please respond to kbccenglish24@hotmail.com

Thanks,
Sam

/m154 WinXP AIM

I'm unable to help with this problem.
Try one of the Windows XP USENET groups.

http://groups.google.ca/groups?&group=microsoft.public.windowsxp

Before I started messing with my network connections, I could sign onto AIM okay, now I can't, what could be the problem? I have 4 computers in my home all connected to a Router/Hub going through a cable modem. All the other computers can sign on to AIM okay, except my WinXP computer that I "think" I messed the settings up on. I can browse the web, get my email etc. I've tried un-installing AIM, cleaning the registry, and re-installing, it still comes up with the error, "connection unavaiable" What could be the problem? My ISP tech support was no help.

/m152 port 3

I don't know why anyone would be using port 3.

Edited by author 20-11-2002 10:47
I have a customer with a SonicWall firewall that was just bombarded over the last 12 hours with an attack.

Message: IP Spoof Detected
Source: 68.42.40.198,3, LAN
Destination: 207.1622.100.225,3, WAN (the destination changes and appears random)
MAC: 00 A0 C9 A7 3D 00

The firewall is configured to allow anything outbound but only Mail (25 and 110) and VPN/PPTP (1723) in.

I believe the MAC is a fake address and I am certain the IP on the source side (LAN) is fake. I have scoured what might use port 3 but my best knowledge is something called CompressNet and I find no further information on that.

Are there any tips/tricks to tracking down which machine on the LAN might be doing this? Is it an actual attack from within the network? Is anyone familiar with this attack?

Thanks in advance.

/m150 SOCKS shim

Just Google on: socks shim

http://www.google.ca/search?q=socks+shim

you will find a number of implementations e.g.

http://www.hummingbird.com/products/nc/socks/

I haven't tried any of these, so I can't provide any info beyond that.

/m143...I know there isn't a 'sockified' version of my app available - I wrote it in VBA (Access 2000 Project). What's this 'general shim' you spoke of that will sockify my TCP/IP connection?

/m148 DMZ

A DMZ is typically one of two zones:
either it sits between your gateway router and your firewall, or it sits as a third network off of your firewall.

In either case, you have to consider two sets of filtering rules: from the "outside" insecure net in/out and from the "inside" secure net in/out.

gateway router -- DMZ -- firewall

external net -- firewall -- internal net
                              |
                           DMZ

What firewall? The DMZ is not a firewall and should be allowing all ports in to that ip address.

< replied-to message removed by QT >

You have to control the firewall and be able to open a port that can let everyone communicate. However, I don't know how to do that (I haven't worked with firewalls before).

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I'm not sure exactly how it's done but I have seen where you can set an 'Alias' for a specific instance through the Client network Utility (look in the Windows System file for 'cliconfg.exe'). You can then setup the port for that TCP/IP instance - at least in theory...I haven't tried it yet myself since I'm trying to go through a proxy besides a port.


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How do I open and close tcp ports? Is it possible to choose a port to run a specific aplication threw like a game?

How can I Host a internet game from behind a firewall? My system is in a DMZ zone, but Still my friends can,t connect?

/m139 proxy

There are two types of proxy - application specific and general. An app specific example would be squid for http proxy.

The most common general proxy is SOCKS

http://www.socks.nec.com/

If they are using SOCKS, check to see if there is a "socksified" version of your application available. Otherwise, I think there may be a generic shim you can use that will socksify your TCP/IP connection.

/m138 MS messenger and /m140 Yahoo messenger

See the information on my ports table

http://www.akerman.ca/port-table.html

Sorry, looking for my own solution and no one seems to have the answers....
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