When you are behind a NAT firewall, there are a few things you have to do to ensure that you can use IRC. There are several ways of managing this. I'm a former Linksys router user, and I found that when using mIRC, this is the best way:
1. In your mIRC options, under "Local Info", change IP method from "Normal" to "Server". (This gets your actual remote IP, rather than your NAT'd IP, which is sent in a DCC chat request if you don't change it. What would happen then, is in effect, you'd be trying to tell the other person to establish a connection to 192.168.1.3, which is probably an invalid IP for them, since it's reserved for local IP's.)
2. Set the ports DCC will use in DCC options. (1050->1100 should suffice.)
3. Go into your router firmware, and forward the port range of 1050 -> 1100 to the machine's ip you want to allow DCC access to.
4. For all other computers, set DIFFERENT port ranges and forward those as well.
by XJester edited by KeysCapt
last modified: 2002-07-22 23:25:46