If packages (including DeployAnywhere DriversDB) which contain files with the extensions ".resources" and/or ".config" or hidden segments like "bin" folders, the Package Server will return a 404 error instead of allowing the download from the SMP Server.
HTTP Error 404.7 - Not Found
The request filtering module is configured to deny the file extension.
Microsoft IIS Request Filtering defaults deny the following extensions. This is a security feature in IIS.