Thanks to all for your help.
Starting a single connection (upload or download) traffic is limited correctly but if I start two connection (one in upload and the other in download) I note that the one in upload runs correctly (how in the previous test) but the one in download stalls and then send some packets and then stalls alternatively.
I solve using sfq to htb leaves, in this way this two flows share the bandwidth correctly.
Fabio -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html