ZyXEL Communications 200 Series User Manual
Chapter 18 ALG
ZyWALL USG 100/200 Series User’s Guide
328
For example, you configure firewall and virtual server rules to allow LAN IP address A to
receive calls through public WAN IP address 1. You configure different firewall and port
forwarding rules to allow LAN IP address B to receive calls through public WAN IP address
2. You configure corresponding policy routes to have calls from LAN IP address A go out
through WAN IP address 1 and calls from LAN IP address B go out through WAN IP address
2.
receive calls through public WAN IP address 1. You configure different firewall and port
forwarding rules to allow LAN IP address B to receive calls through public WAN IP address
2. You configure corresponding policy routes to have calls from LAN IP address A go out
through WAN IP address 1 and calls from LAN IP address B go out through WAN IP address
2.
Figure 235 VoIP with Multiple WAN IP Addresses
Finding Out More
• See
for related information on these screens.
• See
for a tutorial showing how to use the ALG for peer-to-peer
H.323 traffic.
• See
for ALG background/technical information.
18.1.3 Before You Begin
Configure and enable NAT in the ZyWALL before you use the ALG.
18.2 The ALG Screen
Click Network > ALG to open the ALG screen. Use this screen to turn ALGs off or on,
configure the port numbers to which they apply, and configure SIP ALG time outs.
configure the port numbers to which they apply, and configure SIP ALG time outs.
"
If the ZyWALL provides an ALG for a service, you must enable the ALG in
order to perform bandwidth management on that service’s traffic.
order to perform bandwidth management on that service’s traffic.