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  • ISA Server: The HTTP message includes an unsupported header or an unsupported....

    We recently upgraded our ISA Server 2004 to 2006. The error now ocurrs when browsing to an internal web server:

    The HTTP message includes an unsupported header or an unsupported combination of headers

    This is due to a new feature (???) which is introduced by ISA Server 2006. This problem occurs if a Web server response contains an HTTP header that begins with a space or with a TAB character (? Questionable! ?).

    The intended resolution is to obtain the hotfix KB935882 which M$ will send to you. I tried installing the hotfix and kept getting the error:

    Internal Error 2727. FBA_SET_ISA_XHTML_NLS_ZHTW

    I found a post at http://www.bibble-it.com/2007/10/18/...xhtml_nls_zhtw which stated that the poster had the same error and found that it was due to kb939455 already being installed on the server.

    I thus uninstalled kb939455 and installed KB935882 and it installed without error!

    But the hotfix did NOT solve the problem. What I did find was this.....

    I used the address:

    http://10.16.1.41/cms/ioRD.asp?Actio...Mask&LngId=ENG

    to access the internal web server. The IE7 browser gives me the error:

    X
    Network Access Message: The page cannot be displayed


    Explanation: There is a problem with the page you are trying to reach and it cannot be displayed.

    ....
    ....

    Technical Information (for support personnel)

    * Error Code: 502 Proxy Error. The HTTP message includes an unsupported header or an unsupported combination of headers. (12156)
    * IP Address: 10.16.1.41
    * Date: 11/15/2007 12:47:31 AM [GMT]
    * Server: cla-isa.scl.signet.com.au
    * Source: proxy
    Using FireFox V2.0.0.9 works fine and gives me the page I'm after.

    However, if I replace the IP "10.16.1.41" with the host name "crs-cm", IE7 works fine! The same goes for IE6. And I have tested this on more than one workstation. This was not a problem when we were using ISA Server 2004.

    This problem occurrs on our ISA Server CLA-ISA (10.3.0.4 V5.0.5721.240. Interestingly, the problem is not apparent when the user is using our second ISA Server CRS-ISA (10.16.1.100) V5.0.5721.240. The web server is local to the CRS-ISA server.

    CLA-ISA & CRS-ISA Internal Network addressing:
    10.0.0.0 to 10.255.255.255
    172.16.0.0 to 172.31.255.255
    192.168.0.0 to 192.168.255.255
    Anyone know what's happening here??
    |
    +-- JDMils
    |
    +-- Regional Systems Engineer, DotNet programmer & Jack of all trades
    |

  • #2
    Re: ISA Server: The HTTP message includes an unsupported header or an unsupported....

    Reported for movement to General Security.

    Did you seen the following articles?

    http://support.microsoft.com/kb/935693/
    http://support.microsoft.com/kb/939455/
    http://forums.isaserver.org/ISA_Erro...2046592/tm.htm
    http://www.microsoft.com/technet/isa...col_issue.mspx

    Edit: Also a blog of Thomas Shinder
    http://blogs.isaserver.org/shinder/2...and-sun-sites/
    Last edited by Dumber; 15th November 2007, 22:46.
    Marcel
    Technical Consultant
    Netherlands
    http://www.phetios.com
    http://blog.nessus.nl

    MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
    "No matter how secure, there is always the human factor."

    "Enjoy life today, tomorrow may never come."
    "If you're going through hell, keep going. ~Winston Churchill"

    Comment


    • #3
      Re: ISA Server: The HTTP message includes an unsupported header or an unsupported....

      Thread moved.
      Regards,
      Jeremy

      Network Consultant/Engineer
      Baltimore - Washington area and beyond
      www.gma-cpa.com

      Comment

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