Windows 7 TCP Connection Problem

[tod]

I have a Windows GUI application that communicates with the embedded TCP server in a NetBurner 5272. The client recently tried to run the GUI under Windows 7 and can no longer establish a connection. I haven't installed Windows 7 on any computer yet and I was wondering if anyone has troubleshooting tips. I did have the client disable the firewall both from the standard control panel and the admin version. The instrument can be seen by AutoUpdate and it can be pinged. However, when trying to make a connection on port 23 it just immediately returns with the System.Net.Socket marked as disconnected (takes 1-2 seconds). Is there some other security widget that's new to Windows 7 that has to be disabled?

[pbreed]

Can you ping it?

What are the IP addresses and netmasks of the pc and netburner in this case?

[tod]

Yes I can ping it and AutoUpdate can see it.

The PC is at 192.168.1.109 and the instrument is at 192.168.1.106. I was about to say the NetMask was 255.255.255.0 but I just checked and for some reason it is coming up all zeros and I imagine that is the problem. I remember seeing a thread about this so I'll go search the forum. Thanks Paul

[tod]

This particular project always uses
if (EthernetIP == 0) GetDHCPAddress();

I would have suspected that GetDHCPAddress() would set the IP and NetMask. Is this no longer the case? Does XP not care about the NetMask and Windows 7 does?

[tod]

Remote troubleshooting has its challenges. Turns out the customer had installed a new NetBurner (didn't tell me) and forgot to download my firmware. With the right firmware installed it works fine. Sorry for the wasted bandwidth.