Setup A Nat Policy For The Ippbx - ZyXEL Communications ZyWALL USG 200 Series User Manual

Create a host address object named IPPBX-Public for thepublic WAN IP address
2
1.1.1.2.
Figure 138 Creating the Public IP Address Object

7.13.3 Setup a NAT Policy for the IPPBX

Click Configuration > Network > NAT > Add.
• Configure a name for the rule (WAN-DMZ_IPPBX here).
• You want the IPPBX to receive calls from the WAN and also be able to send calls
to the WAN so you set the Classification to NAT 1:1.
• Set the Incoming Interface to wan1.
• Set the Original IP to the WAN address object (IPPBX-Public). If a domain
name is registered for IP address 1.1.1.2, users can use it to connect to for
making SIP calls.
• Set the Mapped IP to the IPPBX's DMZ IP address object (IPPBX-DMZ).
• Set the Port Mapping Type to Port, the Protocol Type to UDP and the
original and mapped ports to 5060.
• Keep Enable NAT Loopback selected to allow the LAN users to use the IPPBX
(see NAT Loopback on page 423
ZyWALL USG 100/200 Series User's Guide
for details).
Chapter 7 Tutorials
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