User guide

Configuring a Backup Internet Connection
Chapter 5: Configuring the Internet Connection 191
Configuring a Backup Internet Connection
You can configure both a primary and a secondary Internet connection. The secondary
connection acts as a backup, so that if the primary connection fails, the Safe@Office
appliance remains connected to the Internet.
You have full flexibility in deciding which port to use for each Internet connection. You
can assign the primary connection to use any of the following ports:
• WAN port (on Non-ADSL models)
• DSL port (on ADSL models)
• Serial port (for use with an RS232 modem)
• DMZ/WAN2 port
• USB ports (for use with a USB modem)
• ExpressCard slot
You can assign the secondary connection to use any of the above ports that is not being
used by the primary connection.
Note: You can configure different DNS servers for the primary and secondary
connections. The Safe@Office appliance acts as a DNS relay and routes requests
from computers within the network to the appropriate DNS server for the active
Internet connection.
Note: You can easily swap the roles of the primary and secondary connections, while
simultaneously shifting all relevant port assignments between the primary and
secondary connections, by using the swap wanconn CLI command. For information,
refer to the Embedded NGX CLI Reference Guide.