The IRC server is currently down for some scheduled maintenance. This shouldn't take more than 6 hours. The server should be running again around 19:00 PM (CEST).
We apologize for the delay and any inconvenience this may have caused. Will keep you updated.
Edit (19:45 PM CEST): The servers are running normal again. If you cannot connect. Flush your DNS cache as we provide native ipv6.