Chapter 11 IPsec VPN for FortiOS 5.0
:
GRE over IPsec (Cisco VPN)
GRE over IPsec (Cisco VPN)
This section describes how to configure a FortiGate VPN that is compatible with Cisco‑style VPNs that use GRE in an IPsec tunnel.
The following topics are included in this section:
•
Overview
•
Configuring the FortiGate unit
•
Configuring the Cisco router
•
Troubleshooting