I have no idea where you got the idea about binding all (any) of those listening ports on the client, but that is incorrect. anecdotally: % lsof -i4 -T s

I have no idea where you got the idea about binding all (any) of those listening ports on the client, but that is incorrect. anecdotally: % lsof -i4 -T s COMMAND PID USER FD TYPE DEVICE imagent 158 mh 6u IPv4 0x2969ca78b2e9b6bb 0t0 TCP mac:52812->pb-in-f125.1e100.net:5223 (ESTABLISHED) authoritatively: http://wiki.xmpp.org/web/SRV_Records#Ports http://wiki.xmpp.org/web/SRV_Records#Ports