[vpn-help] Fwd: Internet connection dies after some minutes of heavy download traffic

[Uracs Tamás]

Hi Matthew,

I testing the lwf9 build and no connection loss so far.
Should I step forward to the lwf 10?
Is it normal, if I try to connect a VPN the result is BSOD?

Best,

Tamas.

-----Original Message-----
From: Matthew Grooms [mailto:mgrooms at shrew.net] 
Sent: Saturday, June 12, 2010 7:44 PM
To: Uracs Tamás
Cc: vpn-help at lists.shrew.net
Subject: Re: [vpn-help] Fwd: Internet connection dies after some minutes of heavy download traffic

On 6/11/2010 7:55 AM, Uracs Tamás wrote:
> Hi Matthew,
>
> I just had a network loss with the lwf8 build.
>

Hi Tamas,

Thanks for testing. I'm a little disappointed that we aren't closer to fixing this issue yet. Here are three new builds to try. I went back to the Microsoft example driver and copied the send receive path functions into our driver for testing ...

http://www.shrew.net/download/vpn/vpn-client-2.1.6-lwf-9.exe
http://www.shrew.net/download/vpn/vpn-client-2.1.6-lwf-10.exe
http://www.shrew.net/download/vpn/vpn-client-2.1.6-lwf-11.exe

lwf9 - Both the send and receive functions are replaced with MS sample passthru functions. If we still see a problem with this build, then we need to consider that the problem may not be the fault of our driver.

lwf10 - The receive functions are replaced with MS sample functions. If we see a problem with this build, there may be an issue with breaking up the send NBLs before processing ( completely legal according to MS docs ).

lwf11 - The send functions are replaced with MS sample functions. If we see a problem with this build, there may be an issue with breaking up the receive NBLs before processing ( completely legal according to MS docs but re-linking is required when ownership is returned to a caller under low resource conditions ).

I also left the driver debug output enabled so it can be captured with a utility such as debugview ...

http://technet.microsoft.com/en-us/sysinternals/bb896647.aspx

If lwf9 works correctly, but lwf10 or lwf11 exhibits the issue, please capture the output and forward it to me. I would advise against doing this until you determine which package ( 10 or 11 ) is suspect. It will slow down your system and potentially alter the outcome of your tests. 
With any luck, we may see something interesting in the logs.

Thanks again for your help. I look forward to hearing the results.

-Matthew