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Chapter 4 - Advanced Configuration for your Network Environment
© Polycom, Inc. 2003 91
Configuring Firewall and LAN Connection Settings
The Firewall & LAN Connection screen allows the LAN manager
to configure firewall options.
To access the Firewall & LAN Connection screen:
Select System Info > Admin Setup > LAN/H.323 > LAN/Intranet >
Firewall/LAN Connection. The following screen appears:
Figure 4-3. Firewall & LAN Connection Screen
In this screen, you can configure the following options:
❑ Use Fixed Ports—Specify the fixed ports assigned to the system
when working with a firewall. For information on port
assignments in multipoint calls, refer to Multipoint Calls and
Firewall Information on page 186.
❑ System is Behind a NAT—This option instructs the system to
use the IP address that appears in the NAT Outside (WAN)
Address field as its external IP address. When using a Virtual
Private Network (VPN) for your network connection, make
sure that System is Behind a NAT is not selected.
If your system is behind a NAT device that is not H.323 aware,
then select this option. If your system is behind an H.323-aware
NAT device, make sure the option is not selected or your system
will not be able to make and receive calls.
❑ Auto Discover NAT—When this option is selected, the system
can get its IP address from the NAT device.