this is a known bug.

http://m0n0.ch/wall/list/showmsg.php?id=305/02

On Feb 4, 2007, at 12:12 PM, David Kitchens wrote:

> Hey everyone,
> I initially saw no issues with 1.3 beta but today I happened to  
> look at
> Diagnostics: IPSEC and on the SAD page I see under the Source  
> column the
> word Invalid, and in the Destination column I see the word  
> extension. The
> other columns are all blank. Looking at the SPD page, everything looks
> normal for the 5 VPN's I have running. I was checking this after  
> working on
> a couple clients servers last nite and one of the sessions kept  
> dropping and
> re-connecting. I just did a reboot and get the same thing. The logs  
> don't
> show anything useful, all VPN's came up within 4 pings after reboot  
> so I
> don't think they are actually dropping.
>
> Dave