GRE IPSec between Cisco 2811 and FortiGate 110C

[laotalax579]

Hello,

Does anybody know if it is possible to configure GRE IPSec tunnel between Cisco 2811 router and FortiGate 110C firewall? I know that FortiGate supports IPSec and GRE tunnels, but maybe somebody succeeded in establishing an IPSec GRE between those routers? Could you also give a link to the appropriate documentation if it is possible?

[spremkumar]

Hi

Is there any specific reason for planning to have GRE over there ? I would suggest checking the below links and the links embedded inside the link.

https://learningnetwork.cisco.com/thread/5400

regds

[laotalax579]

Hello,

the reason why I need GRE over IPSec is to pass RIP routing updates via VPN tunnel. I don't know if it is possible in Cisco IOS to configure IPSec VPN using crypto maps and pass routing updates via that tunnel.

[Federico Coto Fajardo]

Hi,

You can configure the GRE tunnel on the 2811.

I'm aware that you can configure sort of a GRE tunnel on the Fortinet as well, but I have not seen a GRE tunnel between a Cisco and other vendor.

I've only seen GRE tunnels between Cisco devices (however I have not tried it to assure you that it will not work :-()

Federico.

[Kevin Morales]

Fortigate support Tunnel GRE!!,

[Rejohn Cuares]

Refer to this configuration guide.

http://docs.fortinet.com/fgt/handbook/fortigate-ipsec-40-mr1.pdf

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