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See more: VB threads VB.NET Sockets
We have developed a mail server. Server is connected with more than one network. So the server should listen on all the IPs. So we are iterating through the loop of all the IPs. But we are facing the following error :

System.Net.Sockets.SocketException: A blocking operation was interrupted by a call to WSACancelBlockingCall

And because of this error, the server is listening only on the first IP in the loop. So can anyone explain in detail why is this error coming and what should be done to resolve this error??

Thanks and Regards,
Patel Riddhi
Posted 28-Apr-11 20:37pm
Rick Shaub 29-Apr-11 9:15am
Hi, some code snippets would be helpful here.

1 solution

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Solution 1

One problem might be in case you the passive port set 1400 - 1410. Try opening it up in the router.

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