ZyXEL Communications unified security gateway User Manual
Chapter 7 Tutorials
ZyWALL USG 20/20W User’s Guide
144
1
Click 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
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.
need to create a firewall rule to allow the IPPBX to send SIP traffic to the SIP
clients on the LAN.