Polycom QDX 6000 Administrator's Manual page 16

Networks
2
Setting
Fixed Ports
TCP/UDP Ports
Enable H.460
Firewall Traversal
NAT Configuration
NAT Public (WAN)
Address
NAT is H.323
Compatible
Address Displayed
in Global Directory
H.460 NAT Firewall Traversal
You can configure QDX 6000 systems to use standards-based H.460.18 and
H.460.19 firewall traversal, which allows video systems to more easily
establish IP connections across firewalls.
To use this traversal, Polycom QDX 6000 systems and firewalls must be
configured as follows:
2-6
Configure these settings in the Firewall screen:
Description
Lets you specify whether to define the TCP and UDP ports

If the firewall is not H.323 compatible, enable this setting.
The Polycom QDX 6000 system assigns a range of ports
starting with the TCP and UDP ports you specify. The
system defaults to a range beginning with port 3230 for
both TCP and UDP.

If the firewall is H.323 compatible or the system is not
behind a firewall, disable this setting.
Lets you specify the beginning value for the range of TCP
and UDP ports used by the system. The system
automatically sets the range of ports based on the beginning
value you set.
Note: You must also open the firewall's TCP port 1720 to
allow H.323 traffic.
Allows the system to use H.460-based firewall traversal. For
more information, refer to H.460 NAT Firewall Traversal.
Lets you specify whether the system should determine the
NAT Public WAN Address automatically.

If the system is not behind a NAT or is connected to the IP
network through a Virtual Private Network (VPN), select
Off.

If the system is configured behind a NAT that allows HTTP
traffic, select Auto.

If the system is behind a NAT that does not allow HTTP
traffic, select Manual.
Displays the address that callers from outside the LAN use
to call your system. If you chose to configure the NAT
manually, enter the NAT Public Address here.
Specifies that the system is behind a NAT that is capable of
translating H.323 traffic.
Lets you choose whether to display this system's public or
private address in the global directory.
Note: You must open the corresponding ports in the
firewall. You must also open the firewall's TCP port
1720 to allow H.323 traffic.