Before You Begin; The Alg Screen - ZyXEL Communications ZyWall USG20-VPN User Manual

Figure 179 VoIP with Multiple WAN IP Addresses

14.1.2 Before You Begin

You must also configure the security policy and enable NAT in the USG 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.
Figure 180 Configuration > Network > ALG
Chapter 14 ALG
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