- Configuring mIRC
1) The guide says, I can use a single port or as many as ten ports for downloading/uploading. mIRC defines ports 1024-5000 by default. Should I change it so mIRC only defines 10 ports? If so, what ports should I use?
File transfers in mIRC (DCC) work backwards from what you might expect. When you attempt
to send someone a file, it actually results in an incoming connection attempt. What happens
is that your client (mIRC) sends your IP address and a port number to the party on the other
end over the IRC server. Using that information, the other party initiates a direct connection
to your client over the Internet, independent of any IRC server. The file is then transmitted
to the other party. I use a port range of 8990-8999 for this purpose, and have created an
appropriate inbound firewall rule.
I also allow incoming connections on port 113 for ident server.