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 From:  Lee Sharp <leesharp at hal dash pc dot org>
 To:  m0n0wall at lists dot m0n0 dot ch
 Subject:  Re: [m0n0wall] PPTP VPN problem
 Date:  Thu, 19 Aug 2010 15:14:41 -0500
Mikael Bak wrote:
> Mikael Bak wrote:
>> Hi list,
>>
>> In the most recent version of m0n0wall (v1.32) there seem to be a
>> problem with PPTP VPN connections.
>>
>> If I connect, work and then disconnect it seem the connection does not
>> hang up. I have to wait about 10 minutes until I can connect again.
>>
>> I have been able to reproduce this of two different locations both
>> running v1.32. It's ALIX hw if that matters.
>>
>> I have another site running an earlier version of m0n0wall (v1.3) and
>> I'm not able to reproduce the problem on that one.
>>
>> Have I found a bug perhaps?
>>
> 
> To clarify,
> 
> The problem described above appears to happen only if two different
> computers try to connect to the same VPN one after the other.
> 
> Connecting from the same computer after hangup seems to work OK.
> 
> I have tested client machines running Ubuntu 8.04 and WinXP SP3 both
> with latest patches applied.
> 
> I would be very happy if anyone can confirm if they can reproduce this
> problem or not.

That is a built in limitation of the pptp protocol.  There really is no 
fix possible.

			Lee