How to add NAT rules
With the SAR-110 you can use NAT to forward a single port to the same port on a LAN computer, or to a different port. You can do the same for ranges of ports.
Below is the basic NAT rule you need to add to get a webserver running on Port 80 of the computer which has the LAN address of 192.168.7.2.
Rule Flavour: Set this to RDR
Rule ID: Set this to any number. Rules are applied in the order of their ID number, so it is a good idea to increment the ID by 10 each rule, so if at a later date
you want to add a rule before an existing one, you can.
IF Name: This stands for Interface Name. You can leave this set to ALL.
Protocol: Set this to TCP.
Local Address From/To: Put in both of these the local address of the computer you are running the web server on.
Global Address From/To: Leave these both set at 0.0.0.0 This way, traffic from any IP address will be affected.
Destination Port From/To: Set these both to HTTP (80).
Local Port: Set this to HTTP (80) as well.
Then click submit, and the rule will be added.
It is also possible to forward the traffic to a different port on your local computer. So if you had your webserver running on port 1234, then you would
want externatl traffic asking for port 80 to be forwarded to that port. So you just put 1234 in the Local Port box:
You can also forward a range of ports, useful for playing games etc that require a selection of ports to be open. If your game needed various 12 different open in the range of 12203-12257, you can do this with 1 rule, rather
than filling up the routers NAT table with 12 different rules. Just enter it like the picture below. Make sure that you select the right protocol though, or leave it set to all.
It is not that obvious that it will in fact forward all these ports to their respective local port, but it does if you set Local Port to 0. If you want a range of ports forwarded to a single port, then put that port number in the Local Port box.
When you click Submit the rule will be added, and will appear in the list or rules
