[strongSwan] GRE encapsulation within IPSec

[Florin Andrei]

Running strongSwan on Linux, connecting with various IPSec appliances at 
the other end - Cisco ISR, VPN concentrators, etc.

In some cases, it would help if I could create a GRE tunnel inside 
IPSec, terminated on a virtual interface on my end. If the tunnel was 
Cisco / Cisco, this would be trivial. But it's Linux (strongSwan) / 
Cisco.

Is there a way to terminate GRE tunnels with Linux, assuming GRE is 
within the IPSec tunnel?

-- 
Florin Andrei
http://florin.myip.org/