ZyXEL Communications 1000 Manuel D’Utilisation

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 Chapter 7 Tutorials
ZyWALL USG 1000 User’s Guide
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for ge2 IP address 10.0.0.8 to a H.323 device located on the LAN and using IP 
address 192.168.1.56. 
Figure 108   WAN to LAN H.323 Peer-to-peer Calls Example
7.10.1  Turn On the ALG
Click Configuration > Network > ALG. Select Enable H.323 ALG and Enable 
H.323 transformations
 and click Apply.
Figure 109   Configuration > Network > ALG 
7.10.2  Set Up a NAT Policy For H.323
In this example, you need a NAT policy to forward H.323 (TCP port 1720) traffic 
received on the ZyWALL’s 10.0.0.8 WAN IP address to LAN IP address 
192.168.1.56.
10.0.0.8
192.168.1.56