Hi, i'm try to build linux box for blocking unauthorized access and i decided to use layer7 to do this.
 
I'm using debian (sarge) with 2.6.14.3 kernel. I have patched the kernel and the iptables source with the instructions of the site http://l7-filter.sourceforge.net/HOWTO  and after that, all patterns that i'm trying its working but only one it's not working the msnmessenger.pat
 
When i try:
iptables -t mangle -A PREROUTING -p tcp -m layer7 --l7proto msnmessenger -j DROP
 
and then
iptables -t mangle -L -v
 
Its show me that zero packets are matched.
 
Please anyone can help me?
 
PS. Sorry for my bad english.

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Alain Dellon Brito
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