Sip Alg; Table 34 Port Forwarding Rule Setup - ZyXEL Communications P-2602R-DxA Series User Manual

The following table describes the fields in this screen.

Table 34 Port Forwarding Rule Setup

LABEL
Active
Service Name
Start Port
End Port
Server IP
Address
Back
Apply
Cancel

9.5.2 SIP ALG

Some NAT routers may include a SIP Application Layer Gateway (ALG). A SIP ALG allows
SIP calls to pass through NAT by examining and translating IP addresses embedded in the
data stream. When the ZyXEL Device registers with the SIP register server, the SIP ALG
translates the ZyXEL Device's private IP address inside the SIP data stream to a public IP
address.
Use this screen to enable and disable the SIP (VoIP) ALG in the ZyXEL Device. To access
this screen, click Network > NAT > ALG.
Chapter 9 Network Address Translation (NAT) Screens
Click this check box to enable the rule.
Enter a name to identify this port-forwarding rule.
Enter a port number in this field.
To forward only one port, enter the port number again in the End Port field.
To forward a series of ports, enter the start port number here and the end port
number in the End Port field.
Enter a port number in this field.
To forward only one port, enter the port number again in the Start Port field above
and then enter it again in this field.
To forward a series of ports, enter the last port number in a series that begins with
the port number in the Start Port field above.
Enter the inside IP address of the server here.
Click Back to return to the previous screen.
Click Apply to save your changes back to the ZyXEL Device.
Click Cancel to begin configuring this screen afresh.
P-2602R/RL-DxA Series User's Guide
DESCRIPTION
117