IPSec VPN Routing

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Old 01-12-2011
IPSec VPN Routing


I'm trying to setup a gateway VPN between two routers across an unsecured network between two local networks. The routers are both linux and I'm using the ipsec tools, racoon and setkey. So far hosts from either local net can successfully ping hosts on the other local net without issue.

I'd like to also be able to ping from either of the routers to any host on the remote lan, including the remote router. This currently won't work.

My SPD policies on one of the routers is this:

spdadd[any][any] any -P out ipsec esp/tunnel/;
spdadd[any][any] any -P in ipsec esp/tunnel/;

Where my local networks are an with external IP's and respectively.

I've tried to add a route from the router to the remote network such are:
$ ip route add dev eth0

but this doesn't work for me. I'm clearly missing something with the routing.

Any tips would be most appreciated.
Rob Smith
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