Watchguard Firebox SOHO 6 User Manual page 118

Chapter 9: VPN—Virtual Private Networking
4 Type the Name and Shared Secret for the VPN tunnel.
The shared secret is a passphrase used by two IPSec-compatible
appliances to encrypt and decrypt the data that goes through the VPN
tunnel. The two appliances use the same passphrase. If the appliances do
not have the same passphrase, they cannot encrypt and decrypt the data
correctly.
5 Use the default Phase 1 settings or change the settings as
necessary.
To modify Phase 1 settings, complete the following steps:
The Phase 1 settings must be the same on both appliances.
6 Select the negotiation Mode for Phase 1 from the drop-down
list. The mode selections are Main and Aggressive. If the
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WatchGuard Firebox SOHO 6