LinkMAX
HSA300 User Manual
63
If you have multiple WAN (PPP) interfaces, this rule will not be
enforced for data that arrives on other PPP interfaces. This rule
will not be enforced for data that arrives on WAN interfaces not
specified here.
If you have multiple WAN interfaces and want the rule to be
enforced on more than one of them (or all), type the starting
and ending IP addresses of the range.
6. In the Destination Port From and Destination Port To fields,
enter the port ID (or a range) that you expect to see on
incoming packets destined for the LAN computer for which
this rule is being created.
Incoming traffic that meets this criteria will be redirected to the
Local Port number you specify in the next field.
For example, if you grant public access to a Web server on
your LAN, you would expect that incoming packets destined for
that computer would contain the well-known web server port
number, 80. This setting serves as a filter; data packets not
containing this port number would not be granted access to you
local computer.
7. If the LAN computer that you are making publicly available is
configured to use a non-standard port number for the type of
traffic it receives, type the non-standard port number in the
Local Port field.
This option translates the standard port number in packets
destined for your LAN computer to the non-standard number
you specify. For example, if your Web server uses (non-
standard) port 2000, but you expect incoming data packets to
refer to (standard) port 80, you would enter 2000 here and 80 in
the Destination Port fields. The headers of incoming packets
destined for port 80 will be modified to refer to port 2000. The
packet can then be routed appropriately to the web server.
8. Follow steps 7-12 under "The napt rule" on page 59 to
submit your changes.
