The way IM works - its now very difficult to implement blocking with the current version of DLP. You can do it but you need to see the traffic through wireshark to detect which all protocols the IM is using and what are the ports! But it's really hard to say - even you do that, current version of DLP can block the files 100%.
May be in DLP 9.1..!!
- Amiya Bisoi
Thank for the exhaustive answer, I appreciate that.
Let's hope in DLP 9.1, hoping also that other browsers will be supported for Web Posting Rules!!!!
Thanks a lot