ProSafe 802.11g Wireless VPN Firewall FVG318 Reference Manual
Advanced Virtual Private Networking 6-9
v1.0, September 2007
VPN Consortium Scenario 1: Gateway-to-Gateway with Preshared Secrets
The following is a typical gateway-to-gateway VPN that uses a preshared secret for authentication.
Gateway A connects the internal LAN 10.5.6.0/24 to the Internet. Gateway A’s LAN interface has
the address 10.5.6.1, and its WAN (Internet) interface has the address 14.15.16.17.
Gateway B connects the internal LAN 172.23.9.0/24 to the Internet. Gateway B’s WAN (Internet)
interface has the address 22.23.24.25. Gateway B’s LAN interface address, 172.23.9.1, can be
used for testing IPsec but is not needed for configuring Gateway A.
The IKE Phase 1 parameters used in Scenario 1 are:
•Main mode
• TripleDES
• SHA-1
• MODP group 2 (1024 bits)
• pre-shared secret of “hr5xb84l6aa9r6”
• SA lifetime of 28800 seconds (eight hours) with no kilobytes rekeying
The IKE Phase 2 parameters used in Scenario 1 are:
• TripleDES
• SHA-1
• ESP tunnel mode
• MODP group 2 (1024 bits)
• Perfect forward secrecy for rekeying
• SA lifetime of 3600 seconds (one hour) with no kilobytes rekeying
• Selectors for all IP protocols, all ports, between 10.5.6.0/24 and 172.23.9.0/24, using IPv4
subnets
Figure 6-4