This is what I did to filter outbound UDP packets with the desination port number 6003 thru HTB queue 1:1. tc filter add dev eth0 parent 1: protocol ip prio 1 \ u32 match ip dport 6003 0xffff flowid 1:1 However, it only worked for TCP port, not UDP. Does anyone know why this happens and how to solve it? Your help would be greatly appreciated.. thanks in advance! Q-ha Park _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/