Hello, I have used the example found in SYN-DoS rate limit found in iproute examples directory. However I get the following error: RTNETLINK answers: Invalid argument This is from calling the tc filter add dev eth0 parent ffff: protocol ip prio 50 handle 1 fw police rate 1kbit burst 40 mtu 9k drop flowid :1 command. Any ideas what I am doing wrong ? I did read the man page but it is not too informative. Thanks, Darko