Layer 7 protocol

RouterOS General
1

Hi to all,
I would to drop Windows Live Messenger connections. In which way Can I use layer 7 protocol?

Where I get the correct regular expression of messenger protocol?

And for others protocols?

2

http://wiki.mikrotik.com/wiki/L7
the list of regular expressions,
http://l7-filter.sourceforge.net/protocols

3

Thanks a lot.
I’m blocking messenger connection but I would to block also video or audio streaming. I used regexp of RTSP, FLASH, RtP but the traffic isn’t blocked.

Can you help me?

4

the L7 filter doesn’t work perfectly with so many traffics, in the sites suggested above you will find a list of protocol that tested works perfect, but i prefer dont use L7 it’s “EAT” a lot of cpu, i allways try to block some traffics with “triks” maybe, some ports, some ips, some content with “content” match..

5

Content? Can I have more informations about content matching please?