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Trigger Port Start
Enter the starting trigger port number (when you select
custom application). When an application is selected, the
port ranges are automatically configured.
Trigger Port End
Enter the ending trigger port number (when you select
custom application). When an application is selected, the
port ranges are automatically configured.
Trigger Protocol
TCP, TCP/UDP, or UDP.
Open Port Start
Enter the starting open port number (when you select
custom application). When an application is selected, the
port ranges are automatically configured.
Open Port End
Enter the ending open port number (when you select
custom application). When an application is selected, the
port ranges are automatically configured.
Open Protocol
TCP, TCP/UDP, or UDP.
6.3.3
DMZ Host
The DSL router will forward IP packets from the WAN that do not belong to any of
the applications configured in the Virtual Servers table to the DMZ host computer.
To
Activate
the DMZ host, enter the DMZ host IP address and click
Save/Apply
.
To
Deactivate
the DMZ host, clear the IP address field and click
Save/Apply
.
6.3.4
ALG
Session Initiation Protocol (SIP - RFC3261) Application Layer Gateway (ALG) is the
protocol of choice for most VoIP (Voice over IP) phones to initiate communication.
If the user has an IP phone (SIP) or VoIP gateway (SIP) situated behind the router,
the SIP ALG can help VoIP packets pass through when NAT is enabled.
Tick the
SIP Enabled
checkbox
;
to enable SIP ALG. The text box defines the UDP
port to be used (see NOTE below). Adjust settings and then click
Save/Apply
.
