Blocked file types in SharePoint 2007 – Custom web services 2.0 in SharePoint 2007 – Part 3

Please read the post "Add a Web service 2.0 in SharePoint 2007 step by step " before
continue here.

I think, most of the people don't know about blocked file types and where can
we set them. SharePoint by default, won't allow all the file extensions because
of some security issues.

Why the SharePoint team didn't allow them by default. There is a strong
reason behind it. i.e. not other than Security reasons. For example, EXE
extension file, script files etc.

How to remove a blocked file type?

  • Open central administration site.
  • Go to Operations tab.
  • Find a section named "Security Configuration".
  • Under this section, you can find a link for "Blocked file

    Blocked file types

  • On this page, you can see a text box area which displays all the file
    extensions one per line, which SharePoint blocked by default.


  • You can edit and delete the extension. Then SharePoint allows user to upload
    the file or access the file.

So, if you are facing the problem of not able to upload the files of type
.asmx, .exe, .chm etc.. This is the place where you set it. Happy