Fortinet FORTIOS V3.0 MR7, User Manual, Page: 62 / 90

FortiOS v3.0 MR7 SSL VPN User Guide
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SSL VPN dropping connections Configuring a FortiGate SSL VPN
SSL VPN dropping connections
When a FortiGate unit has multiple internet connections, the SSLVPN client can
connect to the SSLVPN web portal, but when attempting to click Connect to start
tunnel mode SSLVPN, the tunnel will start up for a few seconds, then shut down.
This issue occurs when there are multiple interfaces connected to the Internet, for
example, a dual wan configuration.
To resolve this issue, upgrade the FortiGate unit to at least 3.0 MR4 or higher.
Use following commands in CLI to resolve the issue:
config vpn ssl settings
set route-source-interface enable
end
Destination wan1
Destination address remote VPN subnet
Action ipsec
VPN tunnel <vpn phase1 name>
Note: This CLI command is only available in FortiOS 3.00 MR4 and higher.