Network Port Being Locked Up - Isa Server Causing Problems

[butcherman]

I recently installed a phone system into a customers site. We have a soft phone application that we loaded on a few of the customers PCs. When we open one it works fine. When we open the second we get an error, Server.exe.config Only one usage of each socket address.

In this Server.exe.config file on the local pc it is set to point to url=tcp://localhost:8000/MyApp/. Working with tech support we found that the software uses tcp port 8000 to open up the GUI for the application on the localhost, and this is somehow being blocked.

The customer has an ISA server, we have found that when we remove the computers with the soft phone application from the domain or disconnect the ISA server from the network the problem goes away.

What Im trying to find out is how if one computer starts the software it ties up port 8000 for all the other computers and how the ISA server is involved. From my understanding the ISA server should only block external traffic. I know that I dont have a lot of information to give, Im sorry for that. Im just trying to find things that might help, things that I can test or tools that I can use to identify this problem.

Thanks guys.

 

[ICTCity]

Hi there

You can do a sniff with wireshark to understand which port Are involved .

the strange thing is that in your config file you point at localhost which means you should have another exe which opens a connection.

Can't you see anything from ISA log?