Install mumble server
From Andreida
Install the server
apt-get install mumble-server
Configure the server: (remember the password you give here)
dpkg-reconfigure mumble-server
Set a server password in /etc/mumble-server.ini if you don't want everyone to be able to join. Restart the server:
/etc/init.d/mumble-server restart
If you want user registrations via email:
vi /usr/lib/cgi-bin/mumble-server/register.cgi
set the emailfrom and use ' not " around the email.
our $emailfrom = 'here@bla.de';
Then goto http://www.HOST.de/cgi-bin/mumble-server/register.cgi