D-Link DFL-1600 User Manual page 193

18.4. H.323
WebUI
:
1. Outgoing Gatekeeper Rule
Rules IP Rules
Enter the following:
Name: H323Out
Action: NAT
Service: H323-Gatekeeper
Source Interface: LAN
Destination Interface: any
Source Network: lan-net
Destination Network: 0.0.0.0/0 (all-nets)
Comment: Allow outgoing communication with a gatekeeper.
Then click OK
There is no need to specify a specific rule for outgoing calls. The D-Link
Firewall monitors the communication between "external" phones and the
Gatekeeper to make sure that it is possible for internal phones to call the
external phones that are registered with the gatekeeper.
Example:
This scenario is an example of a more complex network that shows how the
H.323 ALG can be deployed in a corporate environment. At the head office
DMZ a H.323 Gatekeeper is placed that can handle all H.323 clients in the
head-, branch- and remote offices. This will allow the whole corporation to
use the network for both voice communication and application sharing. It is
assumed that the VPN tunnels are correctly configured and that all offices
use private IP-ranges on their local networks. All outside calls are done
Add
Note
Using the H.323 ALG in a Corporate Environment
D-Link Firewalls User's Guide
IP Rule:
173