You can also connect to redbrick chat with your own client using ssh forwarding.
Putty on Windows
Irc runs on irc.redbrick.dcu.ie port 6667. To connect to irc you need to use putty to forward this port to your own computer.
Go into the tunnels option on putty, and enter the source port as 6667 and the destination as irc.redbrick.dcu.ie:6667
Then click add. It should then appear like it's shown below.
Now, to connect. Don't click the RedBrick button, instead go back to the session tab. Enter the hostname as login.redbrick.dcu.ie, and click open.
Enter your username and password as normal to login to RedBrick. You'll need to keep that window open while you use irc.
ssh -L 6667:irc.redbrick.dcu.ie:6667 email@example.com
This is based on using mIRC, cause apparently it's popular, but this should work for any client.
In the options add a new server. Use hostname localhost and port 6667.
Select this server to connect to. Enter your nickname and other details, and hit connect.
If you've followed all the steps right then you should now be connected :)