Re: [squid-users] download.windowsupdate.com

Yes, this helps. As you can see, the Windows client attempts to
fetch a subrange. This causes the Squid proxy to query its parent,
which in turn does a TCP_REFRESH_HIT and downloads the ENTIRE FILE
(which is often several megabytes) to the child cache. Massive
network congestion results.

--Brett Glass

At 10:09 PM 7/15/2004, Lizzy Dizzy wrote:
  
>Does this helps?
>
>
>TCP_MISS/206 2417 GET http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/IE6.0sp1-KB823353-x86-ENU_5ee60d6c9b9464c7ddf332147ebd16f.exe - DIRECT/210.184.108.125 application/x-msdownload
>TCP_MISS/206 2441 GET http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/WindowsXP-KB839645-x86-enu_5e25e12b9c6a95d6067ad6b7a85ff8e.exe - DIRECT/210.184.108.125 application/octet-stream
>TCP_MISS/206 2419 GET http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/IE6.0sp1-KB823353-x86-ENU_5ee60d6c9b9464c7ddf332147ebd16f.exe - DIRECT/211.39.137.158 application/x-msdownload
>TCP_MISS/206 2537 GET http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/Windows2000-KB835732-x86-ENU_7b7d1dffd9347af2c166bfcecc4782c.EXE - DIRECT/211.39.137.158 application/x-msdownload
>TCP_MISS/206 2417 GET http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/WindowsXP-KB841873-x86-enu_adc2732501999ebd990a8ec34b5eeb0.exe - DIRECT/211.39.137.158 application/x-msdownload
>TCP_MISS/206 2416 GET http://download.windowsupdate.com/msdownload/update/v3-19990518/cabpool/WindowsXP-KB842773-x86-enu_8c1e3eb9fde8821f40c1aa9cc6e3259.exe - DIRECT/210.184.108.125 application/x-msdownload
>
>
> GET /msdownload/update/v3-19990518/cabpool/WindowsXP-KB839645-x86-enu_5e25e12b9c6a95d6067ad6b7a
> 85ff8e.exe HTTP/1.0..Accept: */*..If-Unmodified-Since: Sat, 03 Jul 2004 16:56:48 GMT..Accept-En
> coding: identity..Range: bytes=3247378-3249377..User-Agent: Microsoft BITS/6.2..Host: download.
> windowsupdate.com..Via: 1.0 cache1.aabb.net.au:80 (squid/2.5.STABLE4)..X-Forwarded-For: xxx.
> 24.255.74..Cache-Control: no-cache, max-age=259200..Connection: keep-alive....
>
>T 192.169.41.47:40820 -> 210.184.108.125:80 [AP]
> GET /msdownload/update/v3-19990518/cabpool/WindowsXP-KB841873-x86-enu_adc2732501999ebd990a8ec34
> b5eeb0.exe HTTP/1.0..Accept: */*..If-Unmodified-Since: Thu, 17 Jun 2004 06:19:03 GMT..Accept-En
> coding: identity..Range: bytes=569173-571172..User-Agent: Microsoft BITS/6.2..Host: download.wi
> ndowsupdate.com..Via: 1.0 cache1.aabb.net.au:80 (squid/2.5.STABLE4)..X-Forwarded-For: xxx.24
> .83.83..Cache-Control: no-cache, max-age=259200..Connection: keep-alive....
>
>T 192.169.41.47:40825 -> 210.184.108.125:80 [AP]
> GET /msdownload/update/v3-19990518/cabpool/IE6.0sp1-KB823353-x86-ENU_5ee60d6c9b9464c7ddf332147e
> bd16f.exe HTTP/1.0..Accept: */*..If-Unmodified-Since: Sun, 27 Jun 2004 21:36:59 GMT..Accept-Enc
> oding: identity..Range: bytes=1155018-1157017..User-Agent: Microsoft BITS/6.2..Host: download.w
> indowsupdate.com..Via: 1.0 cache1.aabb.net.au:80 (squid/2.5.STABLE4)..X-Forwarded-For: xxx.2
> 4.234.46..Cache-Control: no-cache, max-age=259200..Connection: keep-alive....
>
>
>>From: Robert Collins <robertc@squid-cache.org>
>>To: Brett Glass <brett@lariat.org>
>>CC: Lizzy Dizzy <lizzy_99@hotmail.com>,Squid Users <squid-users@squid-cache.org>
>>Subject: Re: [squid-users] download.windowsupdate.com
>>Date: Fri, 16 Jul 2004 07:13:23 +1000
>>
>>On Fri, 2004-07-16 at 03:13, Brett Glass wrote:
>>> Squid does NOT handle Windows Update properly. In fact, it multiplies
>>> the traffic by a factor of 1000 in some cases! This is a serious bug
>>> in Squid that really should be fixed.
>>
>>Got some details?
>>
>>Rob
>>--
>>GPG key available at: <http://www.robertcollins.net/keys.txt>.
>><< signature.asc >>
>
>_________________________________________________________________
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Received on Fri Jul 16 2004 - 14:36:13 MDT