I'm tryting to prioritize interactive traffic, working from cookbook section 15.4. I have inserted the requisite chains: iptables -A PREROUTING -t mangle -p tcp --dport telnet -j TOS --set-tos Minimize-Delay iptables -A PREROUTING -t mangle -p tcp --dport ftp -j TOS --set-tos Minimize-Delay iptables -A PREROUTING -t mangle -p tcp --dport ftp-data -j TOS --set-tos Maximize-Throughput iptables -A PREROUTING -t mangle -p tcp --dport smtp -j TOS --set-tos Minimize-Cost iptables -A OUTPUT -t mangle -p tcp --dport telnet -j TOS --set-tos Minimize-Delay iptables -A OUTPUT -t mangle -p tcp --dport ftp -j TOS --set-tos Minimize-Delay iptables -A OUTPUT -t mangle -p tcp --dport ftp-data -j TOS --set-tos Maximize-Throughput iptables -A OUTPUT -t mangle -p tcp --dport smtp -j TOS --set-tos Minimize-Cost Simple enough, right? Now to see if it's working, I adapt another example from section 9.5.3.2 of the HOWTO, sample configuration for the PRIO qdisc. tc qdisc add dev ppp0 root handle 1: prio tc qdisc add dev ppp0 parent 1:1 handle 10: sfq perturb 5 tc qdisc add dev ppp0 parent 1:2 handle 20: sfq perturb 5 tc qdisc add dev ppp0 parent 1:3 handle 30: sfq perturb 5 No matter what I do, the only counter that ever gets incremented is 20:, and I can verify with tcpdump that the ToS bits are being set. This is the result of sending a short email message: # tc -s qdisc show dev ppp0 qdisc sfq 30: quantum 1514b perturb 5sec Sent 0 bytes 0 pkts (dropped 0, overlimits 0) qdisc sfq 20: quantum 1514b perturb 5sec Sent 1514 bytes 20 pkts (dropped 0, overlimits 0) qdisc sfq 10: quantum 1514b perturb 5sec Sent 0 bytes 0 pkts (dropped 0, overlimits 0) qdisc prio 1: bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1 Sent 1514 bytes 20 pkts (dropped 0, overlimits 0) With the chains I'm using, the smtp session should have gone to 30:, right? I'm running iptables v1.2.6a, iproute 20010824, and linux 2.4.17. Please help me figure out what I'm doing wrong. -- Jacob Elder http://www.lucidpark.net/
