listeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
However, if I start the webserver with the network cable unplugged and then plug it in after the above line of code has run, there is never a problem.
I run the v4.1.1.0 b1 with extra RAM firmware.
Anybody who has an idea what could be the issue?