HP R100 User's Guide Page 103

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ALG settings 103
Client PC IP Address
The IP address of the DMZ computer on the local LAN.
ALG settings
The Application-Layer Gateway (ALG) feature enables Session Initiation Protocol (SIP) and
H323 VoIP traffic to pass through the router without being blocked by its firewall features.
The ALG feature works with the router's NAT feature to control and monitor SIP and H323
sessions, dynamically opening ports as required between SIP/H323 servers on the Internet and
clients on the local network. Note that only SIP server ports can be configured on the router. A
maximum of eight SIP server ports can be defined.
This page includes the following settings:
Enable H323 ALG
Enables H323 traffic priority passthrough on the router.
Enable SIP ALG
Enables SIP traffic priority passthrough on the router for the listed ports.
SIP server ports
The SIP ports on which to provide ALG support. Up to eight ports can be configured. The
default SIP server ports are 5060 and 5061.
Port number
Specifies a SIP port number to add to the server port list.
Port trigger settings
Some applications such as games, video conferencing, remote access applications, and others
require that specific ports in the router’s firewall be opened for access by the applications. You
can configure the port settings from this screen.
Caution Opening ports in your firewall can pose a security risk. You can enable and disable settings
easily. HP recommends that you disable the settings when you are not using a specific
application.
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