[Openswan Users] Where did routes go with Openswan 2.6.31?

Scott T. Cameron routehero at gmail.com
Mon Mar 14 10:16:36 EDT 2011

That's a problem with Windows, and most likely the bug around the number of
routes with non-default MTU routes incrementing but never decrementing.
 Over time, this caused Windows machines to become unresponsive over the

There was a hotfix for this released by Microsoft.


On Mon, Mar 14, 2011 at 10:12 AM, Greg Scott <GregScott at infrasupport.com>wrote:

> > I never heard of tunnels crashing because of a bad MTU. I would not know
> which bug number that could relate to.
> It goes back to 2006 and version 2.4.something and by now it's ancient
> history.  One customer was doing a Windows RDP session over an IPSEC tunnel.
>  I shouldn't have said the tunnel crashed - the RDP session crashed.  The
> whole tunnel didn't drop, just the RDP session.  From the sending PC's point
> of view, I made its MTU smaller and the RDP sessions worked after that.  So
> I posted a question about it in this forum and the suggestion was made to
> put in an updown script that reduced the MTU size on the route for the
> tunnel.  I've been running all my tunnels that way since then.  All with
> netkey - but I only noticed the routes were no longer there last week.
> - Greg
> _______________________________________________
> Users at openswan.org
> http://lists.openswan.org/mailman/listinfo/users
> Micropayments: https://flattr.com/thing/38387/IPsec-for-Linux-made-easy
> Building and Integrating Virtual Private Networks with Openswan:
> http://www.amazon.com/gp/product/1904811256/104-3099591-2946327?n=283155
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