ZyXEL Communications unified security gateway 7.11.5 Set Up a DMZ to LAN Firewall Rule for SIP

Chapter 7 Tutorials

1Click Configuration > Firewall > Add. Set the From field as WAN and the To field as DMZ. Set the Destination to the IPPBX’s DMZ IP address object (DMZ_SIP). IPPBX_DMZ is the destination because the ZyWALL applies NAT to traffic before applying the firewall rule. Set the Access field to allow and click

OK.

Figure 101 Configuration > Firewall > Add

7.11.5 Set Up a DMZ to LAN Firewall Rule for SIP

The firewall blocks traffic from the DMZ zone to the LAN zone by default so you need to create a firewall rule to allow the IPPBX to send SIP traffic to the SIP clients on the LAN.

144
	ZyWALL USG 20/20W User’s Guide