Polycom VSX Series Administrator's Manual page 73

Setting
TCP Ports
UDP Ports
3. Select and configure these settings:
Setting
Enable
NAT/Firewall
Traversal
NAT Configuration
NAT Public (WAN)
Address
NAT is H.323
Compatible
Address Displayed
in Global Directory
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information. Systems deployed outside a firewall are potentially vulnerable to
unauthorized access. You can also register to receive periodic email updates and
advisories.
Description
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.
Description
Allows the system to use H.460-based firewall traversal. For
more information, refer to
page 3-18.
Lets you specify whether the system should determine the
NAT Public WAN Address automatically.
• 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.
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.
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Configuring Network Use
H.460 NAT Firewall Traversal
for timely security
on
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