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over the existing telephone network using the gateway (ip-gateway)
connected to the ordinary telephone network.
Head Office Firewall Configuration
The head office has placed a H.323 Gatekeeper in the DMZ of the corporate
D-Link Firewall. This D-Link Firewall should be configured as follows.
Chapter 18. Application Layer Gateway (ALG)
Figure 18.7: H.323 Scenario 5.
D-Link Firewalls User's Guide