Set Up A Wan To Dmz Firewall Rule For Sip - ZyXEL Communications ZYWALL USG 20 Manual

• Click OK.
Figure 100 Configuration > Network > NAT > Add

7.11.4 Set Up a WAN to DMZ Firewall Rule for SIP

The firewall blocks traffic from the WAN zone to the DMZ zone by default so you
need to create a firewall rule to allow the public to send SIP traffic to the IPPBX. If
a domain name is registered for IP address 1.1.1.2, users can use it to connect to
for making SIP calls.
ZyWALL USG 20/20W User's Guide
Chapter 7 Tutorials
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