NetComm NB702 User Manual page 42

3.4.2 NAT (Network Address Translation)
Click on the NAT (Network Address Translation) link on the top of the page. You will
then see the NAT Setup table.
You may enable NAT one any existing interface by placing a check in the box next to
the interface name. Then click on the Submit button to confirm the configuration.
You can also set up PAT (Port Address Translation) by clicking on the PAT link next
to the interface name. Refer to the next section if you would like to configure PAT.
Note: When using NAT/PAT a 'Portforward' or 'Incoming Table' entry will be
automatically generated for port 23 (Telnet). This will allow you to log-in
from the WAN side of the NB702/4. If you do not want to allow Telnet
service via the WAN port (Internet) you should delete the table entry for
port 23.
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NB702/NB704 User Guide