GRE IPSec between Cisco 2811 and FortiGate 110C

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Jun 18th, 2010
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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?

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laotalax579 Fri, 06/18/2010 - 07:44
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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 F... Fri, 06/18/2010 - 08:31
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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 :-()



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