IIS ApplicationHost.config - Request Filtering (e.g. Filetype *.mdb)

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If you want to allow a filetype like e.g. *.mdb it's not enough to allow that type within SharePoint.

You've to allow it as well within IIS (if request filtering is enabled)

 

That can be done manually

 

 

OR: if you've multiple IIS Servers within your SharePoint Farm via PowerShell Script:

 

 

$servers = "server1","server2","server3","server4"

foreach ($server in $servers)

 {

 

 

 Invoke-Command -computername $server -ScriptBlock {

 

        import-module webadministration

 

        Function Enable-IISFileExtension

        {

            PARAM(

                 $ConfigFile,

                 $FileType,

                 $Flag

        

                 )

            $xml = [XML](Get-Content -Path $ConfigFile -ErrorAction STOP)

            $item = $xml.configuration."system.webServer".security.requestFiltering.fileExtensions.add | Where-Object {$_.fileExtension -match "$FileType"}

            $item.allowed = $Flag

            $xml.Save($ConfigFile)

   

            return $xml.configuration."system.webServer".security.requestFiltering.fileExtensions.add | Where-Object {$_.fileExtension -match "$FileType"}

   

        }

        Enable-IISFileExtension -ConfigFile "C:\Windows\System32\inetsrv\config\applicationHost.config" -FileType ".mdb" -Flag "True"

 

 

  Exit-PSSession

  }

 }