I've to set a router to use the QoS servive.
But i need to know with of these band service is used by LFS.
Can u help me ?

qos is notorious for screwing with many things, normally i tell people to turn it off...

looking at your options, there aren't many to start with. i'd go with the user-define tcp and udp, and set the ports to your lfs server (if any)... if you're just running a client, i'd just turn it off altogether.