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UDP ports 500 and 4500 are busy? v_iv13-Nov-12 18:46 v_iv 13-Nov-12 18:46  My application must work on a remote computer with ports 500 and 4500 on UDP-protocol, but it doesn't work. I tried to test these ports by this udp-server. http://www.codeproject.com/Articles/11740/A-simple-UDP-time-server-and-client-for-beginners Antivirus is switched off, Firewall too. When I start udp-server as "timeserver 500" or as "timeserver 4500" I get message: "Could not bind name to socket". But with other ports it works. Why? (In the source code I do not see any restrictions for port-numbers.) On my local home computer - the same behavior! Can anyone explain this? Re: UDP ports 500 and 4500 are busy? Richard MacCutchan13-Nov-12 22:34 Richard MacCutchan 13-Nov-12 22:34  See http://www.speedguide.net/port.php?port=500[^]. One of these days I'm going to think of a really clever signature.

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