Usage Example: H.323 Proxy

You can use GnuGks proxy function to tunnel your VOIP traffic through firewalls.

If you are using Netmeeting or other H.323 clients internally, you can install GnuGk on your firewall and proxy your calls including T.120 data.

Example Configuration

Suppose GnuGk runs on the firewall and the firewall has three network interfaces:
  • WAN: ADSL IP
  • LAN1: IP=10.0.1.1 Network=10.0.0.0/8
  • LAN2: IP=192.168.0.1 Network= 192.168.0.0/16

Endpoints may register with the gatekeeper from WAN, LAN1 or LAN2. For calls from WAN to WAN or LAN1/LAN2 to LAN1/LAN2, the gatekeeper only routes the call signaling as a normal gatekeeper. If a call comes from WAN to LAN1/LAN2, or vice versa, the gatekeeper routes all traffic between caller and callee (proxy mode) and tunnels it through the firewall. 

[Gatekeeper::Main]

[RoutedMode]
GKRouted=1
Q931PortRange=30000-39999
H245PortRange=40000-49999

[Proxy]
Enable=1
InternalNetwork=10.0.0.0/8,192.168.0.0/16
T120PortRange=50000-59999
RTPPortRange=50000-59999



Last updated: 25. Dec 2020