Report TCP Listener: can it fail? in Remote Control, Monitoring and the Internet Posted September 26 4 hours ago, Rolf Kalbermatter said: And together with the SO_EXCLUSIVEADDRUSE flag this makes new requests to create a socket on the same port fail with an according error, since the port is technically still in use by that half dead socket. That socket gets eventually deleted and then a new Create Listener call on that port will succeed, unless someone else was able to grab it first. Are Listener ports affected by this "half-dead" issue? I would have thought this is just and issue of TCP Connections (with a connected remote party) rather than a Listener.