D-Link DFL-2500 User Guide - Page 188
Rules, IP Rules, IP Rule, Action, Service, Source Interface, Destination Interface, Source Network,
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18.4. H.323 169 Rules → IP Rules → Add → IP Rule: Enter the following: Name: H323In Action: Allow Service: H323 Source Interface: any Destination Interface: core Source Network: 0.0.0.0/0 (all-nets) Destination Network: ip-wan (external IP of the firewall) Comment: Allow incoming calls to H.323 phone at ip-phone. Then click OK To place a call to the phone behind the D-Link Firewall, place a call to the external IP address on the firewall. If multiple H.323 phones are placed behind the firewall, one SAT rule has to be configured for each phone. This means that multiple external addresses have to be used. However, it is preferred to use a H.323 gatekeeper as in the "H.323 with Gatekeeper" scenario (see 18.4.5), as this only requires one external address. Example: H.323 with Gatekeeper Figure 18.5: H.323 Scenario 3. In this scenario, a H.323 gatekeeper is placed in the DMZ of the D-Link Firewall. A rule is configured in the firewall to allow traffic between the D-Link Firewalls User's Guide
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