Fortinet FortiGate 1U Quick Start Manual page 205

Now select Create Phase 2, set it to use
the new Phase 1, and expand the Advanced
options.
Specify Source address as the Branch
subnet and Destination address as the HQ
subnet.
Adding firewall addresses
for the local and remote
LAN on HQ
Go to Firewall Objects > Address >
Addresses.
Create a local address. Set Type to Subnet,
Subnet/IP Range to the Branch subnet,
and Interface to an internal port.
Using IPsec VPN to provide communication between offices 185