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Chapter 8 NAT
P-2302HWUDL-P1 Series User’s Guide
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Each field is described in the following table.
8.2.5 NAT ALG Screen
Use this screen to enable and disable SIP (VoIP), FTP (file transfer), and H.323 (audio-visual)
ALG in the ZyXEL Device. To access this screen, click Network > NAT > ALG.
Figure 67 Network > NAT > ALG
Each field is described in the following table.
Table 53 Network > NAT > Trigger Port
LABEL DESCRIPTION
Name Enter a name to identify this rule. You can use 1 - 15 printable ASCII characters,
or you can leave this field blank. It does not have to be a unique name.
Incoming
Start Port
End Port
Enter the incoming port number or range of port numbers you want to forward to
the IP address the ZyXEL Device records.
To forward one port number, enter the port number in the Start Port and End Port
fields.
To forward a range of ports,
• enter the port number at the beginning of the range in the Start Port field
• enter the port number at the end of the range in the End Port field.
If you want to delete this rule, enter zero in the Start Port and End Port fields.
Trigger
Start Port
End Port
Enter the outgoing port number or range of port numbers that makes the ZyXEL
Device record the source IP address and assign it to the selected incoming port
number(s).
To select one port number, enter the port number in the Start Port and End Port
fields.
To select a range of ports,
• enter the port number at the beginning of the range in the Start Port field
• enter the port number at the end of the range in the End Port field.
If you want to delete this rule, enter zero in the Start Port and End Port fields.
Apply
Click this to save your changes and to apply them to the ZyXEL Device.
Cancel Click this to discard your changes.
Table 54 Network > NAT > ALG
LABEL DESCRIPTION
Enable SIP ALG Select this to make sure SIP (VoIP) works correctly with port-forwarding and port-
triggering rules.
Enable FTP ALG
Select this to make sure FTP (file transfer) works correctly with port-forwarding
and port-triggering rules.