Before You Begin; The Alg Screen - ZyXEL Communications ZyWALL USG 300 User Manual

• See Section 21.3 on page 439

21.1.3 Before You Begin

You must also configure the firewall and enable NAT in the ZyWALL to allow
sessions initiated from the WAN.

21.2 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 ZyWALL provides an ALG for a service, you must enable the ALG in order
to use the application patrol on that service's traffic.
Figure 329 Configuration > Network > ALG
ZyWALL USG 300 User's Guide
for ALG background/technical information.
Chapter 21 ALG
437