Re: [Users] ipsec stop causes total connection loss

From: Philip Burrow (phil.burrow_at_blueyonder.co.uk)
Date: Wed Oct 02 2002 - 01:08:38 CEST


> > When I bring down a set of ipsec tunnels between two hosts, it causes
all
> > connectivity between those hosts to be lost altogether meaning I have to
> > restart my systems to get it back online again. I have no idea why, and
the
> > routing table is the same. Is it these 'eroutes' ive seen you guys on
about?
> >
> > Phil.
> >
>
> If you bring down one side of the tunnel, the other side thinks it's still
> up until rekeytime + (a few secs) happens, and the other side expires the
> SA. This means it tries to respond on ipsec# interfaces, which won't work
> too well if one side has stopped FreeS/WAN.

Yep, that's exactly what I've been experiencing. Are you saying that if I
wait long enough it will automagically start working?

> If you do this often, you may wish to apply the Delete/NotifySA patches
> from http://open-source.arkoon.net - if applied, when you nicely tear down
> ipsec connection (ipsec setup stop, etc...) the other side will delete the
> SA + eroute.

That would be useful, thanks for the link!

Phil.

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