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To: Abraham Pearson <apearson,AT,atlantiscasino,DOT,com>
Subject: Re: Periodically losing connection
From: Les Mikesell <les,AT,futuresource,DOT,com>
Date: Thu, 10 Jun 2004 20:13:58 -0500
Cc: cipe-l,AT,inka,DOT,de
In-reply-to: <6900FF01AE7ACB4185D6B8B96A5C9E7B01E7C3@atex1.corp.atlantiscasino.com>
References: <6900FF01AE7ACB4185D6B8B96A5C9E7B01E7C3@atex1.corp.atlantiscasino.com>

On Thu, 2004-06-10 at 19:06, Abraham Pearson wrote:
> We are using Cipe through a Pix firewall and a Microsoft ISA server. 
> We can get the connection up, but we are losing the connection 
> periodically.  The connection lasts anywhere from three minutes
> to twenty minutes.  Any ideas?

If one end or the other is doing dynamic NAT, the UDP entries
are timing out in periods of no activity. If possible, make
the NAT static - if not, set up a ping or something to generate
traffic often enough to maintain the NAT table entry.  If you
aren't using NAT you can have a similar issue with firewalls
that dynamically allow return packets to the source of UDP
packets.  You can fix that by configuring it to always allow
the CIPE packets based on source, destination and port.

---
  Les Mikesell
   les,AT,futuresource,DOT,com


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