500 Internal Server Error. The data is invalid. (13)


  • Hello

    When our users visit a certain website ( they get an error:

      Error Code: 500 Internal Server Error. The data is invalid. (13)

    On the TMG I see this in the log:

    Compression: client=No, server=Yes, Internet SecureNAT From cache http Failed Connection Attempt Inspected 13 The data is invalid.  anonymous Web Proxy Filter Allowed Response Originated from Proxy Server

    Malware scanning is disabled.  I have inserted in the Sites Exempt from Malware Inspection, Sites Exempt from HTTPS Inspection and Sites Exempt from Network Inspection System.

    I have a two node EMS controlled array with version 7.0.9027.441

    Does anyone else behind a TMG array get this error from that exact site?

    Kind regards, Søren


    Monday, April 18, 2011 9:18 AM


All replies

  • Hi again

    This seems to be caused by the HTTP comression, as the site loads fine when compression is disabled.

    Is there any way I can disable compression for a single site/url set without disabling it for my network object External?



    Monday, April 18, 2011 10:29 AM
  • Hi,


    Thank you for the post.


    As far as I know, HTTP compression is a global HTTP policy setting. It applies to all HTTP traffic that passes through TMG/ISA to or from a specified network or network object, rather than to traffic handled by a specific rule.  To configure HTTP compression, please refer to this:




    Nick Gu - MSFT
    Monday, April 25, 2011 5:58 AM