Chapter 15 ALG
ZyWALL 110/310/1100 Series User’s Guide
236
Figure 138
VoIP with Multiple WAN IP Addresses
for ALG background/technical information.
15.1.3 Before You Begin
You must also configure the firewall and enable NAT in the ZyWALL to allow sessions initiated from
the WAN.
15.2 The ALG Screen
Click Configuration > 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.
Figure 139
Configuration > Network > ALG