ZyXEL Communications ZyWALL 1000 18.3 ALG Screen

Chapter 18 ALG

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.

Figure 174 VoIP with Multiple WAN IP Addresses

18.3 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.

"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.

Figure 175 Network > ALG

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ZyWALL USG 1000 User’s Guide