Download Plugin http://forum.teamspeak.com/showthread.php/54113-Teampeak3-Nagios-Plugin

“Install the Plugin”

cp file check_teamspeak3 to /usr/lib/nagios/plugins/
chmod 755 check_teamspeak3

add the following lines to /etc/nagios3/commands.cfg:

define command{
    command_name check_teamspeak3
    command_line /usr/lib/nagios/plugins/check_teamspeak3 -H $ARG1$ -u $ARG2$ -p $ARG3$
}

create a corresponding service

define service{
  use generic-service
  host_name myTeamspeakHost
  service_description TeamSpeak3 
  servicegroups front_end_services
  check_command check_teamspeak3!ServerIP!TS3UserName!TS3Password
  notifications_enabled 1
}