ZyXEL Communications ZyWall ATP series - 14.2 The ALG Screen

Chapter 14 ALG
ZyWALL ATP Series User’s Guide
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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 239 VoIP with Multiple WAN IP Addresses
14.1.2 Before You Begin
You must also configure the security policy and enable NAT in the Zyxel Device to allow sessions initiated
from the WAN.
14.2 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.
Note: If the Zyxel Device provides an ALG for a service, you must enable the ALG in order to
use the application patrol on that service’s traffic.