From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antony Stone Subject: Re: VPN behind Linux Firewall Date: Mon, 24 Jun 2002 18:09:08 +0100 Sender: netfilter-admin@lists.samba.org Message-ID: <200206241709.SAA16948@slate.rockstone.co.uk> References: <00ff01c21b9e$fafe0790$0327a8c0@kayegee> <200206241657.RAA16900@slate.rockstone.co.uk> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <200206241657.RAA16900@slate.rockstone.co.uk> Errors-To: netfilter-admin@lists.samba.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii" To: netfilter@lists.samba.org On Monday 24 June 2002 5:57 pm, Antony Stone wrote: > I think it might be interesting to add a logging rule, or use tcpdump / > ethereal etc, to look for UDP packets from source port 500 to source port > 500, and see if these appear soon before the connection goes downj ? Obviously that was supposed to read "...look for UDP packets from source port 500 to destination port 500..." > UDP 500 is the Internet Key Exchange (IKE) protocol, and the two end > systems might be trying to re-key (although 10-15 minutes is a bit quick), > and something might be blocking that ? > > Just a thought. > > > > Antony.