Configuration Of Trixbox Behind A NAT Firewall Setup

1. Be sure the LAN/Private address is statically assigned to the Trixbox server.
2. Check the following ports on your firewall:
   
   
   • UDP Port 5060 is for SIP communication.
   • UDP Port 5060-5082 range, SIP communications.
   • UDP Port 10000 - 20000 is for RTP - the media stream, voice/video channel.
3. Check etc/hosts file, put the same name as you gave the Trixbox server in the hosts file under the address 127.0.0.1 - ie.:

   127.0.0.1 localhost asterisk.localhost mytrixbox.mytrixbox.com (name of your server)

4. Trixbox setup:
   
   If your Trixbox is behind a Nat firewall you must also edit the sip_nat.conf file. Go to the Trixbox home page, then select administrator mode. Select from PBX -> Config File Editor , click on sip_nat.conf and insert the following lines:

   externip = your_external_ip_address
   localnet = internal.network.address_of_your machine/255.255.255.0

   Click on update and then restart the machine!