Just enter mc.techfurs.net:36565 or techfurs1.dyndns.org:36565  on your client and it should connect to our servers.The servers may not be up 24/7 everyday. 
Anyone is allowed to join it, but some hardware upgrades would help.
If you can afford it, please help with software, hardware and power costs. Click the ChipIn! button below [PayPal].
Or donate Bitcoin's to: 1GxEZULiBFJVfpYLjehf7VVgBazRBnizwG

We now have our own Xonotic Server! Download the free game for Windows, Mac or Linux at http://www.xonotic.org/ 
Look for TechFurs.net on the multiplayer game list! Game Mode: Assault.