Version 1

    When using IIS as source repository for Alert Central's updates, you must consider that IIS by default blocks HTTP requests which contains escaped characters. Thus, when downloading the file libstdc++-4.4.7-3.el6.x86_64.rpm, IIS converts it to libstdc\\+\\+-4.4.7-3.el6.x86_64.rpm. This will trigger the following error message:


    Error IIS double-escaped sequence for libstdc sec.png


    In order to fix this, we need to edit the web.config file located in the application root directory and add the bold text lines in configuration > system.webServer, as you can see in this simple example:


    web.config modification

    <?xml version="1.0" encoding="UTF-8"?>



            <directoryBrowse enabled="true" />



                  <requestFiltering allowDoubleEscaping="true" />






    Website needs to be restarted in order to read the new configuration. After the modifications, download works successfully.