Watchguard Firebox SOHO 6 User Manual page 114

Chapter 9: VPN—Virtual Private Networking
IPSec-compatible appliances include the Firebox SOHO 6, the Firebox
II/III, and the Firebox Vclass.
• The data from your ISP about the Internet connections for each
of the two IPSec-compatible appliances:
- IP address
- Primary DNS IP address (optional)
- A secondary DNS address (optional)
- Domain name (optional)
• The network addresses and subnet masks for the two trusted
networks.
The trusted networks at the either ends of the VPN tunnel must have
different network addresses.
If the appliances that connect through the VPN tunnel are not
configured correctly, the VPN tunnel will not function.
WatchGuard recommends that you make a record of the
configuration information in the following format.
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WatchGuard Firebox SOHO 6