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  • Chester Campbell 61 posts 99 karma points
    Dec 09, 2019 @ 16:35
    Chester Campbell
    0

    Random 404s in Umbraco 7 on Win Server 2012 R2 IIS 8.5

    I need help with an odd problem. I have a collection of Umbraco 7 sites (various different versions) that run just fine on my local machine and on their production servers.

    But on the staging server they all exhibit the same problem. Both front-end and backoffice requests will experience random 404 errors. Sometimes the 404 is for a physical file that I know exists: css, js files or an image.

    But other times it's a request to an API endpoint. And upon refresh different requests will 404. Sometimes, rarely, there are no 404s. But each refresh is a gamble.

    I have double-check the Umbraco configurations and the file permissions. On my test site I even went so far as to grant the local "Everyone" account full Modify permissions.

    The App Pools are configured with .NET CLR version 4.0.30319 and Integrated pipeline mode.

    When I run aspnet_regiis.exe -lv in the command line I get back:

    aspnet_regiis.exe -lv
    Microsoft (R) ASP.NET RegIIS version 4.0.30319.0
    Administration utility to install and uninstall ASP.NET on the local machine.
    Copyright (C) Microsoft Corporation. All rights reserved.
    2.0.50727.0 C:\Windows\Microsoft.NET\Framework64\v2.0.50727\aspnet_isapi.dll
    4.0.30319.0 C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll
    4.0.30319.0 C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll
    

    So it appears the .NET framework is installed and registered properly.

    I'm at a loss here. This problem is making the staging sites unusable at this point.

    Anyone seen this before or have any suggestions?

    Thanks!

  • Yakov Lebski 287 posts 1133 karma points
    Dec 13, 2019 @ 15:24
    Yakov Lebski
    0

    I see similar issue when security tools installed on server, please check that you have no tool like UrlScan or similar installed. You can see it handler list in IIS

  • Chester Campbell 61 posts 99 karma points
    Dec 16, 2019 @ 14:38
    Chester Campbell
    0

    Thank you for the suggestion! Unfortunately, we do not have anything like URLScan installed on the server.

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