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Date:      Mon, 7 Jul 2008 18:30:09 GMT
From:      Alexander Motin <mav@FreeBSD.org>
To:        freebsd-net@FreeBSD.org
Subject:   Re: kern/123200: [netgraph] Server failure due to netgraph mpd and dhcpclient
Message-ID:  <200807071830.m67IU9ZG008237@freefall.freebsd.org>

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The following reply was made to PR kern/123200; it has been noted by GNATS.

From: Alexander Motin <mav@FreeBSD.org>
To: bug-followup@FreeBSD.org, zaulychny@yahoo.com
Cc:  
Subject: Re: kern/123200: [netgraph] Server failure due to netgraph mpd and
 dhcpclient
Date: Mon, 07 Jul 2008 21:27:58 +0300

 If I understand right, you are receiving route to you VPN server using 
 DHCP. I think you could get in trouble when DHCP lease time ended and 
 you loose that route making VPN connection route default. In it's place 
 it could cause routing loop by wrapping tunnel inside itself, causing 
 in-kernel recursion loop.
 
 I have some feedbacks that stack protection mechanisms added to stable 
 allow system better handle such case. Could you upgrade you system to 
 the 6-STABLE and try again?
 
 -- 
 Alexander Motin



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