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I try CAsyncSocket, yes, same result. But now the problem is solved. With the latest Win7 Update the problem disappeared.
I don't know what it was, but it works now.
Thanks for your help.

It's a blocking Socket and WSAGetLastError() return the same value: 10060

I use my own CSocket Class since Years in a lot of difference Apps and it works on every System i ever installed my Apps.
But since a couple of weeks i have this problem only on my own System.

It does't matter if i connect to "localhost", "127.0.0.1" or my own IP-Address 192.168.0.6, it works.
Only if i try to connect to p.e. 192.168.0.5 it fails, but only when i try with my App using...

Hallo
I have a problem with MFC CSocket.
Trying to Connect a Client works with “localhost” and fails with all other systems.
The same address and port is reachable with telnet in any case.
I...