Hi Matthew,<br><br><div class="gmail_quote">2010/5/16 Matthew Grooms <span dir="ltr"><<a href="mailto:mgrooms@shrew.net">mgrooms@shrew.net</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On 5/16/2010 4:11 PM, <a href="mailto:wosgien@gmail.com" target="_blank">wosgien@gmail.com</a> wrote:<br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Matthew,<br>
<br>
2010/5/16 Matthew Grooms <<a href="mailto:mgrooms@shrew.net" target="_blank">mgrooms@shrew.net</a> <mailto:<a href="mailto:mgrooms@shrew.net" target="_blank">mgrooms@shrew.net</a>>><div class="im"><br>
<br>
<br>
A few more questions ...<br>
<br>
1) What type of connection are you using ( local ethernet, internet<br>
dsl, cable, fiber )?<br>
<br>
</div></blockquote>
<br>
Ok. So the bulk of the traffic is NNTP ( TCP:119 ) traffic?</blockquote><div><br></div><div>Yes, exactly.</div><div><br></div><div>Just a further note: When I'm downloading binary files from the usenet, i have configures NewsLeecher to use 50 connections to the server in parallel.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I have a VDSL line with 50 Mbps, and I have a router Telekom Speedport W<br>
722V. My PC is connected to the router via devolo dLAN powerline.<br>
<br>
2) What is the nature of your IP traffic during high utilization (<br>
ftp http, torrent )?<br>
<br>
</blockquote>
<br></div>
Nice :) I wish I had a 50Mbps connection to my house. In any case, does this involve some sort of PPP negotiation between your router and the telco edge?</blockquote><div><br></div><div>Yes, I think so.</div><div> </div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> If so, that would lend credence to my theory that the issue is related to our kernel mode IP fragment cache code. I'm setting up a test system for this at the moment, but you can also try setting the soft MTU of your workstations network adapter to 1400 bytes or so ...<br>
<br>
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\{AdapterID}\Tcpip\Parameters<br>
<br>
Name : MTU<br>
Data Type: DWORD<br>
<br>
Set it to equal the required MTU size in decimal (default 1500)<br>
<br>
... and disable/re-enable the adapter. This will cause TCP to use a MSS of 1380 or so which should avoid any IP fragmentation. After your done testing, you can just revert the MTU change.</blockquote><div><br></div><div>
Hmm, there are a huge number of entries under HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\ and it's not so easy for me to find {AdapterID}. For the time being, I would like to avoid that test. However, if you are not able to find and fix the problem without me doing that test, let me know and I will try it.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Downloading binary files from the usenet by means of NewsLeecher. Usenet<br>
provider is Giganews. NOT using encrypted server connection (SSL).<br>
<br>
3) Does the problem still occur if all Shrew Soft services are<br>
stopped in the computer management console?<br>
<br>
<br>
After stopping all three Shrew Soft services (but with the Shrew Soft<br>
Lightweight Filter still enabled), the problem still occurs.<br>
<br>
</blockquote>
<br></div>
Ok, definitely an issue isolated to the driver code. Thanks for testing.<br><font color="#888888">
<br>
-Matthew<br></font></blockquote><div><br></div><div>Best regards,</div><div>Andreas </div></div><br>