This is to anyone interested ...
Based on over 3 years experience with hub/router/firewall configurations, and the same amount of time with dcc chat and/or dcc send/receive:
(unable to connect) is a problem on the sender's end, not the person receiving (generally a router problem, but sometimes nothing more than "use random ports" checked in Options .. Connect .. Options .. Advanced).
Transfer timed out is a problem on the receiving end, either an extension in your ignore list, or a firewall problem (mIRC not allowed in Norton's or XP's firewall usually). It is NOT a normal router problem.
If you can receive ANY dcc chat connection then the problem is either ignore list, or not on your end.
Last edited by CtrlAltDel; 28/04/05 10:09 PM.