Chapter 7 Tutorials

• Click OK.

Figure 109 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.

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ZyWALL USG 50 User’s Guide