HTTP403 Error caused by server update: August 11, 2020-KB4569746 Cumulative Update for .NET Framework 4.8 for Windows 10 version 1607 and Windows Server 2016RSS

2 replies

Last post Oct 15, 2020 06:44 AM by Jalpa Panchal

  • HTTP403 Error caused by server update: August 11, 2020-KB4569746 Cumulative Update for .NET Frame...

    Oct 14, 2020 10:25 AM|Cathal1|LINK

    When the update 2020-08 was installed on our Windows 2016 server we were unable to access a system on the server for a number of days. We encountered the HTTP403 error whenever we tried to access the system. Once we reset the server to a state prior to the update the access to the system was back. I'm wondering if this was a common problem with this update? What element of the update would have caused the HTTP403 error?

    Note: We are not 100% sure whether it was the 2020-08 update, it may have been a previous version. Nevertheless, any info on what could cause a HTTP403 error from these types of errors would be greatly appreciated. Also, access to the system is granted through Okta Authentication. Would this have caused an issue?

    Thanks in advance.

  • Re: HTTP403 Error caused by server update: August 11, 2020-KB4569746 Cumulative Update for .NET F...

    Oct 14, 2020 04:41 PM|lextm|LINK

    It is pointless to first focus on the updates, instead of collecting the basic information about such 403 errors via FRT https://docs.microsoft.com/en-us/iis/troubleshoot/using-failed-request-tracing/troubleshooting-failed-requests-using-tracing-in-iis

    Dig what FRT says and the culprit should be clear.

    Lex Li
    Affordable IIS Consulting Services at https://support.lextudio.com/services/consulting.html
    ---------------------------
    This posting is provided "AS IS" with no warranties, and confers no rights.
  • Re: HTTP403 Error caused by server update: August 11, 2020-KB4569746 Cumulative Update for .NET F...

    Oct 15, 2020 06:44 AM|Jalpa Panchal|LINK

    Hi,

    Could you please provide more detail about the issue? you are getting this error on all the sites or any particular site? what kind of site you are using? what your configuration of the site and application pool? are you using an SSL certificate with your site? what is the sub status code? you will get the more detail by running failed requests tracing and check the iis log for the error sub status code.

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