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Http 1.1 Settings - 4.Jan.2007 6:51:50 PM

longman

Posts: 44
Joined: 7.Feb.2005
Status: offline

Running Isa 2004 sp2. I have noticed since we installed sp2 a few months ago
that accessing certain sites fail, basically won't load the page in internet
explorer. One setting that appears to effect this behavior is the http 1.1
settings in internet explorer. If I select both settings (Use http 1.1 and
Use http 1.1 through proxy connections) the problem occurs. If I deselect
one or the other the web pages of the problematic sites load correctly.
Any thoughts?

Post #: 1

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RE: Http 1.1 Settings - 4.Jan.2007 8:36:04 PM

abqtech

Posts: 216
Joined: 9.Mar.2004
Status: offline

Are the sites your having problems with setup in the Direct Access list or are they sites on the Internal side of you network? If so, you'll want to review this posting.
http://blogs.isaserver.org/pouseele/2006/07/21/solving-the-directly-access-these-servers-or-domains-issue-in-isa-server-2004-sp2/

(in reply to longman)

Post #: 2

RE: Http 1.1 Settings - 4.Jan.2007 8:43:58 PM

longman

Posts: 44
Joined: 7.Feb.2005
Status: offline

All external sites with one being microsoft.com. I think it is an issue with http compression. It is very consistent. With http 1.1 and use http 1.1 through proxy connections on www.microsoft.com will not load. Turn either setting off or both off and it loads fine.

(in reply to abqtech)

Post #: 3

RE: Http 1.1 Settings - 5.Jan.2007 2:41:33 PM

abqtech

Posts: 216
Joined: 9.Mar.2004
Status: offline

Do the following post SP2 fix's released by Microsoft, apply to your problem?
ISA 2004 Standard @:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=2aa53ee6-527c-4398-ab7c-fcf8e8dde8ce

ISA 2004 Enterprise @:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=ebc32d50-2e9f-4d55-aeff-eeba511827b0

(in reply to longman)

Post #: 4

RE: Http 1.1 Settings - 5.Jan.2007 2:44:21 PM

longman

Posts: 44
Joined: 7.Feb.2005
Status: offline

Already installed. Another forum has suggested the following patch:

http://support.microsoft.com/default.aspx?scid=kb;en-us;921937

(in reply to abqtech)

Post #: 5

RE: Http 1.1 Settings - 5.Jan.2007 3:24:33 PM

abqtech

Posts: 216
Joined: 9.Mar.2004
Status: offline

In Interet Explorer, do you have "Show friendly HTTP Error messages" disabled? If so what error is displayed in your browser?

If you monitor the traffic in ISA, what does ISA report?

(in reply to longman)

Post #: 6

RE: Http 1.1 Settings - 5.Jan.2007 3:39:54 PM

longman

Posts: 44
Joined: 7.Feb.2005
Status: offline

It is enabled. No error message appear on the client at all - the web page just doesn't load. The Isa Logs show nothing beyond the attempt to access the specific url and the rule that allowed it.

(in reply to abqtech)

Post #: 7

RE: Http 1.1 Settings - 5.Jan.2007 4:33:00 PM

abqtech

Posts: 216
Joined: 9.Mar.2004
Status: offline

I assume your client is a web proxy client, correct? Does the access rule that's supposed to engage this request require user authentication? If so have you tried to create a rule for this scnenario, that allows all users?

(in reply to longman)

Post #: 8

RE: Http 1.1 Settings - 5.Jan.2007 5:46:57 PM

longman

Posts: 44
Joined: 7.Feb.2005
Status: offline

Yes the browser is configured as a web proxy client. My rules do require authentication. And yes I have tried anonymous rules with both a securnat client and web proxy client - results are the same. The only thing that changes the behavior at the client is by unchecking one of the http 1.1 settings within ie. This tells me it is an http compression issue with Isa.

(in reply to abqtech)

Post #: 9

RE: Http 1.1 Settings - 9.Jan.2007 7:21:10 AM