TCP ports open or used?

[DJW]

I am running windows 98SE and trying to use PC to PC calling in Yahoo
messenger 8. As soon as I try to accept a call from someone running XP
with a firewall Yahoo messenger crashes. I crash but not the other
person.
I went to yahoo messenger help and I quotethem:
What ports are used by Yahoo! Voice services?
Yahoo! Messenger will work if any one of these TCP ports are open:
5061
443
80
At least ONE of these ports must be open in order to make PC-to-PC or
PC-to-phone (Phone Out) calls, or to receive calls (Phone In).
Where on do I find if theses ports are open and how could I open one if
I need to?

 

[Robert Aldwinckle]

(cross-post added to Win98 Networking)

I am running windows 98SE and trying to use PC to PC calling in Yahoo
messenger 8. As soon as I try to accept a call from someone running XP
with a firewall Yahoo messenger crashes. I crash but not the other
person.
I went to yahoo messenger help and I quotethem:
What ports are used by Yahoo! Voice services?
Yahoo! Messenger will work if any one of these TCP ports are open:
5061
443
80
At least ONE of these ports must be open in order to make PC-to-PC or
PC-to-phone (Phone Out) calls, or to receive calls (Phone In).
Where on do I find if theses ports are open and how could I open one if
I need to?

Does that OS have netstat? (I think so but I suspect it is less capable than NTx's.)

netstat -abo

in XP would show me listening ports, the module name and PID
of the program doing it.


FWIW

Robert Aldwinckle
---

 

[DJW]

Robert,
I am running Windows 98SE not NT or XP and yes I found netstat version
5.00.1515.1 in my windows folder. What is it and what do I do with it I
did not double click on it yet to see it run or is it an application
that runs always at start up?

 

[Robert Aldwinckle]

Robert,
I am running Windows 98SE not NT or XP and yes I found netstat version
5.00.1515.1 in my windows folder. What is it and what do I do with it

You use it as a command in a command window.

Does your OS have a Help facility?
E.g. in XP you would press Win-F1 and then search for netstat

Hmm.. in order to actually see how to use it XP users would then have
to use the Related link in the article that finds. The article itself assumes
that anybody reading it would know enough to open a cmd window.


HTH

Robert
---

 

[James Egan]

Robert,
I am running Windows 98SE not NT or XP and yes I found netstat version
5.00.1515.1 in my windows folder. What is it and what do I do with it I
did not double click on it yet to see it run or is it an application
that runs always at start up?

If you want to look for listening ports try sysinternals (recently
bought out by Microsoft) TCPview
http://www.microsoft.com/technet/sysinternals/networkingutilities.mspx
That, however, won't necessarily identify the problem.

If the program you are using isn't working then it is likely that a
firewall is blocking the listening port or maybe you need to enable
port forwarding on a router? To determine this, you need to post more
information about what equipment is used to connect your computer to
the Internet.


Jim.

 

[Robert Aldwinckle]

If you want to look for listening ports try sysinternals (recently
bought out by Microsoft) TCPview
http://www.microsoft.com/technet/sysinternals/networkingutilities.mspx
That, however, won't necessarily identify the problem.

Thanks, James. Good tip.

http://www.microsoft.com/technet/sysinternals/utilities/tcpview.mspx

<quotes>
TCPView works on Windows NT/2000/XP and Windows 98/Me.

On Windows NT, 2000 and XP TCPView also reports
the name of the process that owns the endpoint.

TCPView Pro, a Winternals Software product, has a number of features
that make it much more powerful and useful than TCPView:
See what process has each endpoint opened (on Win9x as well)

TCPView Pro is available as part of Winternals Administrator's Pak.
</quotes>

Does the Win9x version at least have the netstat -o (PID) equivalent?

If the program you are using isn't working then it is likely that a
firewall is blocking the listening port or maybe you need to enable
port forwarding on a router? To determine this, you need to post more
information about what equipment is used to connect your computer to
the Internet.

Good stuff! That's why I cross-posted this thread. ; )


Robert
---

 

[DJW]

Ok guys you are starting to speak a bit of Greek to me.
I looked in the help under the start menu for netstat and it said no
topics were found. I also looked for TCP ports with the same results.
Like I said above I found netstat version 5.00.1515.1 in my windows
folder. Still not sure what to do with it as the above refer to: You
use it as a command in a command window
But I still have not started it up for I just don't run or change
things with windows for that has gotten me in trouble before. I am a
Mac user by trade not into PCs much.
My sister is the user I am trying to communicate via yahoo messenger
with web cams that work ok. But when we try to voice chat is when I
crash just yahoo messenger nothing else. She knows less than me when it
comes to PCs. She is using XP home addition with a cable broad band
connection hard wired but through cable modem and a wireless router.
The wireless router is used with a laptop not related to this problem
running windows 98. If it is her fire wall or router giving us the
problem would I be the one crashing while running a dial up internet
connection running windows 98SE here at my end?
I down loaded TCPView and the demo of Port Explorer demo for 30 days of
use. I have not installed either yet however.
Any suggestions as to there use as in which one would be best to see my
TCP ports. And should I have my sister download and install one at her
end to see what is what. Or does window XP home have a TCP port or
firewall utility that she could see what is set. Are there any online
step by step help for her or me in trying to track down the above
mentioned applications.

 

[James Egan]

comes to PCs. She is using XP home addition with a cable broad band
connection hard wired but through cable modem and a wireless router.
The wireless router is used with a laptop not related to this problem
running windows 98. If it is her fire wall or router giving us the
problem would I be the one crashing while running a dial up internet
connection running windows 98SE here at my end?

Why your computer is crashing, I couldn't say, but in simple tcp
connectivity terms the program will open and use whatever tcp ports it
needs and unless you have installed a third party firewall which is
misbehaving, you should be okay at the 98se end.

At the other end, the computer may well be listening okay, but you are
not connecting directly to it. You are connecting (correctly) to the
(ip address of) the router. The router then has to determine what to
do with those received packets. Which of the computers on the local
network to pass them onto. By default the packets will be dropped (ie
not passed anywhere) unless you configure the router to forward them
on to a specific lan ip address (ie the wired xp machine).

First off, I would look for more information about setting up yahoo
messenger behind a nat router. It might be a requirement to give the
pc a static local ip address so that the router can be configured to
forward the necessary packets to it.


Jim.

 

[James Egan]

First off, I would look for more information about setting up yahoo
messenger behind a nat router. It might be a requirement to give the
pc a static local ip address so that the router can be configured to
forward the necessary packets to it.

I should have added that you might traverse the router automatically
by enabling universal plug and play if the router supports it, though
some people (including me) prefer manual configuration because of the
potential security issues of allowing remote configuration of such
devices.


Jim.