Check Point UTM-1 Edge User Manual page 521

Adding and Editing VPN Sites
Complete the fields using the information in VPN Network Configuration Fields
on page 501, and then click Next.
•
If you chose Specify Configuration or Route All Traffic, the Backup Gateway
dialog box appears.
In the Backup Gateway IP field, type the name of the VPN site to use if the
primary VPN site fails, and then click Next.
Chapter 16: Working with VPNs 507