Polycom VSX 3000 Administrator's Manual page 67

Setting Description
TCP Ports Lets you specify the beginning value for the range of TCP
and UDP ports used by the system. The system
UDP Ports
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.
NAT Configuration Lets you specify whether the system should determine the
NAT Public WAN Address automatically.
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NAT Public (WAN) Displays the address that callers from outside the LAN use
Address to call your system. If you chose to configure the NAT
manually, enter the NAT Public Address here.
NAT is H.323 Specifies that the system is behind a NAT that is capable of
Compatible translating H.323 traffic.
Address Displayed Lets you choose whether to display this system's public or
in Global Directory private address in the Global Directory.
Visit the Polycom Security Center at
information. Systems deployed outside a firewall are potentially vulnerable to
unauthorized access. You can also register to receive periodic email updates and
advisories.
If the system is behind a NAT that allows HTTP traffic,
select Auto.
If the system is behind a NAT that does not allow HTTP
traffic, select Manual.
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 behind a firewalled NAT router that is
UPnP (Universal Plug and Play) certified, select UPnP.
Many routers used in homes and small businesses
support UPnP NAT traversal. If this is your situation, try
selecting UPnP first. If this selection does not work for
your router, select Auto or Manual.
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Configuring Network Use
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