500.19 Internal Server Error - RequestFilteringModule config error

Question

I'm working on a site built on the Telligent Community platform. It comes with a zip of the site that I need to setup and build from. I've setup the site and have been working on it, except the default web.config has one thing that breaks the site, unless I comment it out. The line is <requestFiltering allowDoubleEscaping="true" /> in the following section:

<system.webServer>
  <validation validateIntegratedModeConfiguration="false" />
  <security>
    <requestFiltering allowDoubleEscaping="true" />
  </security>
  ... continues ...

If I comment out the line, my site works. If not, I get this error:

Config Error
This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".

One thing I read was to go to applicationHost.config file located in windows\system32\inetsrv\config and change the following values in <sectionGroup name="system.webServer"> to "Allow":

<section name="handlers" overrideModeDefault="Deny" />
<section name="modules" allowDefinition="MachineToApplication" overrideModeDefault="Deny" />

I've made the above changes and done an iisreset and I still get the same error. Does anyone have any ideas that will allow this line in my config to work?

Answer 1

You'd actually want to check applicationHost.config (and possibly machine.config) and verify this is set: <section name="requestFiltering" overrideModeDefault="Allow" />