To connect to DareNET, you can simply use irc.darenet.org, which should automatically choose the best server for you based on your geographic location and current user load for all servers on the network. All of our servers accept connections on ports 6660 - 6669. SSL-enabled connections are supported on ports 6697 and 9999 (verify certificates).
For those of you who can't, or simply don't want to use an IRC client, give our WebChat client a try, which can be found here.
If you're interested in contributing to the network by providing a server, please see our Linking Guidelines.