ZyXEL P-791R v2 Guia Do Utilizador

P-791R v2 Support Notes

It is because SUA makes your LAN appear as a single machine to the outside
world. LAN users are invisible to outside users. So, to make an internal server
for outside access, we must specify the service port and the LAN IP of this
server in Web configurator. Thus SUA is able to forward the incoming packets
to the requested service behind SUA and the outside users access the server
using the P-791R v2's WAN IP address. So, we have to configure the internal
IPsec client as a default server (unspecified service port) when it acts a server
gateway.

Note: The NAT type should be SUA only, then you can edit port
forwarding.

22. What is Traffic Redirect?

Traffic Redirect forwards WAN traffic to a backup gateway when the
Prestige cannot connect to the Internet through its normal gateway.
Thus make your backup gateway as an auxiliary backup of your WAN
connection. Once Prestige detects its WAN connectivity is broken,
Prestige will try to forward outgoing traffic to backup gateway that users
specify in traffic redirect configuration menu.

23. What is Dial Backup?

It is Auto Fail-over and Fall-back WAN Backup Solution.

The P-791R v2 features a Fail-over and Fall-back WAN Backup Solution for
complete reliability. When the DSL connection fails, traffic is forwarded to
either a backup ISDN or analog modem to maintain data exchange. When the
DSL connection is re-established, traffic will be fully restored. The WAN
Backup Solution saves device maintenance cost and reduces loss from daily
operation.

In addition, P-791R v2 also performs backup functions by redirecting traffic to
a specific gateway to ensure availability of the Internet connection.