Rejected protocol messages and dropped connections

[Michael St. Laurent]

I have one site that is experiencing TCP connection drops over their
PPTP VPN connection to our Poptop server.  What I see in the logs are a
whole lot of rejected protocol errors when this happens.  Since their
ISP connection is over ATM my theory is that one of the packet fragments
gets dropped and throws off the data stream sync.

Does this make sense?  If so is there any way to mitigate?

--
Michael St. Laurent
IT Department
Hartwell Corporation



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[Michael St. Laurent]

No feedback on this?  Am I not providing enough information to comment
on?

> -----Original Message-----
> From: Michael St. Laurent [mailto:mikes@...]
> Sent: Wednesday, April 22, 2009 3:47 PM
> To: poptop-server@...
> Subject: [Poptop-server] Rejected protocol messages and dropped
> connections
>
> I have one site that is experiencing TCP connection drops over their
> PPTP VPN connection to our Poptop server.  What I see in the logs are
a
> whole lot of rejected protocol errors when this happens.  Since their
> ISP connection is over ATM my theory is that one of the packet
fragments
> gets dropped and throws off the data stream sync.
>
> Does this make sense?  If so is there any way to mitigate?
>
> --
> Michael St. Laurent
> IT Department
> Hartwell Corporation

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[James Cameron-2]

On Mon, Apr 27, 2009 at 11:08:47AM -0700, Michael St. Laurent wrote:
> No feedback on this?  Am I not providing enough information to comment
> on?

It is a bit vague, yes.

My guess on a second reading ... the ends lose synchronisation at PPP
level, resulting in rejected protocol errors, resulting in TCP
connection drops.  I've no ATM theory.

--
James Cameron                         http://quozl.netrek.org/
HP Open Source, Volunteer             http://opensource.hp.com/
PPTP Client Project, Release Engineer http://pptpclient.sourceforge.net/

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