how to block flash content?

Hi

what you can do is blocking on mime base which means:

Check the mime header of flash with wireshark like following example for youtube:

       Hypertext Transfer Protocol
       HTTP/1.0 200 OK\r\n
       Request Version: HTTP/1.0
       Response Code: 200
       Server: DCLK-AdSvr\r\n
       Content-Type: video/x-ms-asf\r\n
       X-Google-Inred-Content-Type: video/x-ms-asf\r\n
       Content-Length: 410\r\n
       Content-Encoding: gzip\r\n

       Hypertext Transfer Protocol
       HTTP/1.1 200 OK\r\n
       Request Version: HTTP/1.1
       Response Code: 200
       Last-Modified: Mon, 14 Sep 2009 00:40:51 GMT\r\n
       Content-Type: video/x-flv\r\n
       Content-Length: 200994\r\n
       Connection: close\r\n
       Content-Disposition: attachment; filename="video.flv"\r\n
       Expires: Thu, 29 Oct 2009 09:06:24 GMT\r\n
       Cache-Control: public,max-age=3600\r\n
       Date: Thu, 29 Oct 2009 08:06:24 GMT\r\n
       Server: gvs 1.0\r\n


For mime based blocking use the Content-Type information in our example:

       Content-Type: video/x-ms-asf\r\n
       Content-Type: video/x-flv\r\n

Configure a content-header for our example like following (you have to uncomment special character on regex based which means \\ does uncomment "/"):

      # config webfilter content-header
      # edit [Use a proper Integer for content-header example "1"]
      # set comment [Use a description exmaple "Block Video"]
      # config entries
      # edit "video\\/.*"
      # set action [allow | block | exempt]
      # next
      # end
      # set name [Name for "content-header" example "video-audio-block"]
      # next
      # end

This content header can be afterwards used in webfiler profile:

      # config webfilter profile
      # edit [Name of WebFilter Profiles]
      # config web
      # set content-header-list [Integer for the  "content-header" example "1"]
      # end
      # next
      # end

After that use the webfilter in the correspoding Policy Rule with the proxy profile and/or ssh sshl proxy profile for encrpiton (HTTPS).

hope this helps

have fun

Andrea