Re: Proxy Autoconfig Problem

"Geoff Varney" <GeoffVarney@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:D286C4F7-2523-4740-A046-A7D762086D50@xxxxxxxxxxxxxxxx
>
> "Robert Aldwinckle" wrote:
>
>> "Geoff Varney" <GeoffVarney@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
>> news:07200BB6-7F45-4E49-9E24-B94EBE89E7C2@xxxxxxxxxxxxx
>> ....
>> > If, however, I try to use the "automatically detect settings" option in IE
>> > it doesn't apply the settings.
>> ....
>> > Any suggestions?
>>
>>
>> Is OS NT5x? Have you tried experimenting with proxycfg too?
>>
>> Apparently in some cases it helps to explicitly execute the command
>> even when you think the defaults should be in effect. YMMV.
>>
>> <title>KB896221 - Windows-based client computers behind a proxy server cannot access the Windows Update Web site</title>
>>
>> (MSKB Boolean search for
>> proxycfg AND wpad
>> )
>
> OS is Windows XP SP2 (5.1.2600). I have also had the same problem testing
> Windows Server 2003. IE *is* 6.0 SP1 or SP2 in all cases.
>
> Can you explain just what I should do with proxycfg?

Not really. I just know that it can be used to resolve problems
with proxy servers in unintuitive ways. At least that's my impression
from seeing how it has been used when resolving problems with WU.


> I see that it can be used to place proxy settings into registry, etc.

I'm not sure but I think it's the -d switch which resolves the most problems
but then again I don't know how closely their cases would match yours.


> What I am trying to do is
> impose proxy settings on computers throughout a school district. There are 4
> sites and 4 proxies. I was trying to make this as automated as possible. I
> have in the past used Group Policy to set proxy. However, not all computers
> are in Active Directory, not all are IE.

Oh. Are the settings in Internet Properties exclusively IE ones?
Does FireFox require you to duplicate them somewhere?
(Mark mentioned FireFox as something which didn't have the problem.)

Ah. When are you making the proxy settings?
I remember in NT4sp6a being convinced that using Tools, Options,...
never worked. I had to use Internet Properties instead (e.g. Run...
control inetcpl.cpl,,4
)

Here's an article which sort of confirms what I remember seeing

<title>KB835456 - When you change your proxy server settings, the change
does not take effect in Visual Studio .NET</title>

(TechNet search for
"internet properties" proxy
)


> I was hoping to use Automatic
> Detection to pick up those that don't have GP available to them. I can still
> use proxy.pac if I use GP to set the path to the pac file, I think that may
> work reliably enough, but still miss a number of browsers this way. I don't
> know how to troubleshoot the breakdown in the process, using either the
> Ethereal captures or any other methods.

No kidding. I tried to find how script debugger could be used to watch
a proxy script work and got nowhere. FileMon and RegMon would
probably show you at least if an attempt was being used to use it
or related files.


>
>
>>
>>
>> Hmm... what version of wininet.dll do you have?
>>
>> <title>KB829643 - Internet Explorer 6.0 Service Pack 1 cannot use the
>> Automatic Detect Settings feature in a Windows XP-based computer
>> to find a WPAD server</title>
>>
>> (MSKB Boolean search for
>> wpad AND kbiesearch
>> )
>>
>
> My wininet.dll is ver. 6.0.2900.2180 dated 8/4/2004.

Is that base XPsp2? I wouldn't want to place any bets on hotfix inclusions
in it. Who knows when the source cutover would have been done?


> Hopefully versions newer than the one in the KB article don't have
> the old problem, but I think that's happened before.

Exactly. A related problem now is that hotfixes are no longer being
integrated into security patches by default. You get the hotfixed version
only if you already have a hotfix. E.g. in the latest cumulative update

http://www.microsoft.com/technet/security/Bulletin/MS05-025.mspx

there's this
<extract>
Wininet.dll 6.0.2900.2668 02-May-2005 20:52 657,920 SP2GDR
</extract>
or this
<extract>
Wininet.dll 6.0.2900.2668 02-May-2005 20:57 658,944 SP2QFE
</extract>

Note that they both have the same version number but different sizes
and File Versions. E.g. I know that I don't have the hotfixed version
because my FileVersion contains GDR (whatever that means.)

<example>
F:\WINDOWS\system32>filever wininet.dll -v | find "FileVersion"
FileVersion 6.00.2900.2668 (xpsp_sp2_gdr.050430-1553)
</example>

(plus the size matches the SP2GDR size.)


FWIW

Robert
---



.

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