Chapter 18 ALG
ZyWALL USG 300 User’s Guide
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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