Hi Daryl

Thanks for that. However my the problem isn't running OSPF over IPsec but instead how to get the IPsec routes from the kernel to bird. From there on to OSPF it's trivial. In the first place Bird needs to learn the routes somehow...

Cheers

Michael

On 08/07/13 18:19, Daryl Turner wrote:

Hi Michael

Have looked at something like OSPF over GRE over IPsec? You may need to play around with MTU/MSS so you don't run into fragmentation issues.  I've never done this myself in BIRD but it's pretty common on other network kit.

Daryl

On 8 Jul 2013 05:57, "Michael Ludvig" <mludvig@logix.net.nz> wrote:
Hi

I've got a handful of Linux IPsec gateways, some running OpenSwan some
with ipsec-tools. Each gateway handles a number of tunnels with dozens
of remote subnets. Unfortunately these remote subnets don't show up in
the Linux routing table, i.e. "ip route show" only comes up with the
standard two records for the link subnet and for the default route.
Obviously bird doesn't see the ipsec routes either.

Now I've got a script that parses the output of "ip xfrm policy show"
and exports them as static routes but that involves a manual rebuild
every time the tunnels change and "birdc configure" to propagate the
changes.

Is there any way to automatically export these ipsec routes to OSPF?

Thanks!

Michael