This is inaccurate. /dcc chat from within your LAN works with the vast majority of routers- there are only a very small number of exceptions, and they're usually older models, that don't do proper NAT in some cases. /dcc send'ing yourself a file is actually a fairly reliable way to test if your DCC is configured correctly.

Are you connecting to IRC through a BNC or proxy?

- argv[0] on EFnet #mIRC
- "Life is a pointer to an integer without a cast"