Chapter 5 Managing Traffic
ZyWALL USG 20-2000 User’s Guide
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5.7.1.3 Set Up a Firewall Rule For H.323
Configure a firewall rule to allow H.323 (TCP port 1720) traffic received on the WAN_IP-for-H323 IP
address to go to LAN IP address 192.168.1.56.
1 Click Configuration > Firewall > Add.
In the From field select WAN.
In the To field select LAN1.
Configure a name for the rule (WAN-to-LAN_H323 here).
Set the Destination to the H.323 device’s LAN1 IP address object (LAN_H323). LAN_H323 is
the destination because the ZyWALL applies NAT to traffic before applying the firewall rule.
Set the Service to H.323.
Click OK.
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