Chapter 11 IPsec VPN for FortiOS 5.0 : Internet-browsing configuration : Creating an Internet browsing security policy
  
Creating an Internet browsing security policy
On the FortiGate unit that acts as a VPN server and will provide secure access to the Internet, you must create an Internet browsing security policy. This policy differs depending on whether your gateway-to-gateway configuration is policy-based or route-based.
To create an Internet browsing policy - policy-based VPN
1. Go to Policy > Policy > Policy and select Create New.
2. Select the Policy Type as VPN and leave the Policy Subtype as IPsec.
3. Enter the following information and then select OK:
Local Interface
The interface to which the VPN tunnel is bound.
Local Protected Subnet
All
Outgoing VPN Interface
The interface to which the VPN tunnel is bound.
Remote Protected Subnet
The internal range of address of the remote spoke site.
VPN Tunnel
Select Use Existing and select the tunnel that provides access to the private network behind the FortiGate unit.
Allow traffic to be initiated from the remote site
Enable
Inbound NAT
Enable
4. Enable inbound NAT in the CLI.
config firewall policy
edit <policy_number>
set natinbound enable
end
To create an Internet browsing policy - route-based VPN
1. Go to Policy > Policy > Policy and select Create New.
2. Leave the Policy Type as Firewall and leave the Policy Subtype as Address.
3. Enter the following information and then select OK:
Incoming Interface
The IPsec VPN interface.
Source Address
All
Outgoing Interface
The interface that connects to the Internet. The virtual IPsec interface is configured on this physical interface.
Destination Address
The internal range of address of the remote spoke site.
Action
ACCEPT
Enable NAT
Enable
The VPN clients must be configured to route all Internet traffic through the VPN tunnel.