Configure Nat For Internal Servers - ZyXEL Communications P-334WT Support Notes

Configure NAT for Internal Servers

Some tips for this application:
Generally, without IPSec, to configure an internal server for outside access, we need to configure the
server private IP and its service port in SUA/NAT Server Table. The NAT router then will forward the
incoming connections to the internal server according to the service port and private IP entered in SUA/
NAT Server Table.
However, if both NAT and IPSec is enabled in P-334WT, the edit of the table is necessary only if the
connection is a non-secure connections. For secure connections, none SUA server settings are required
since private IP is reachable in the VPN case. Remember, IPSec is an IP-in-IP encapsulation, the internal
IP header is not translated by NAT.
For example:
Internal Server----P-334WT(NAT+IPSec)-----ADSL Modem----Internet----Remote Network