D-Link DFL-260E User Manual for DFL-260E - Page 305
The H.323 ALG, Example 6.4. Protecting Phones Behind NetDefend Firewalls
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6.2.9. The H.323 ALG Chapter 6. Security Mechanisms Example 6.4. Protecting Phones Behind NetDefend Firewalls In the first scenario a H.323 phone is connected to the NetDefend Firewall on a network (lannet) with public IP addresses. To make it possible to place a call from this phone to another H.323 phone on the Internet, and to allow H.323 phones on the Internet to call this phone, we need to configure rules. The following rules need to be added to the rule set, make sure there are no rules disallowing or allowing the same kind of ports/traffic before these rules. Web Interface Outgoing Rule: 1. Go to: Rules > IP Rules > Add > IPRule 2. Now enter: • Name: H323AllowOut • Action: Allow • Service: H323 • Source Interface: lan • Destination Interface: any • Source Network: lannet • Destination Network: 0.0.0.0/0 (all-nets) • Comment: Allow outgoing calls 3. Click OK Incoming Rule: 1. Go to: Rules > IP Rules > Add > IPRule 2. Now enter: • Name: H323AllowIn • Action: Allow • Service: H323 • Source Interface: any 305
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