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#!/bin/bash# The Ultimate Setup For Your Internet Connection At Home# http://lartc.org/howto/lartc.cookbook.ultimate-tc.html#AEN2241 ## Set the following values to somewhat less than your actual download# and uplink speed. In kilobitsDOWNLINK=3600UPLINK=500DEV=ppp0# clean existing down- and uplink qdiscs, hide errorstc qdisc del dev $DEV root 2> /dev/null > /dev/nulltc qdisc del dev $DEV ingress 2> /dev/null > /dev/null###### uplink# install root HTB, point default traffic to 1:20:tc qdisc add dev $DEV root handle 1: htb default 20# shape everything at $UPLINK speed - this prevents huge queues in your# DSL modem which destroy latency:tc class add dev $DEV parent 1: classid 1:1 htb rate ${UPLINK}kbit burst 6k# high prio class 1:10:tc class add dev $DEV parent 1:1 classid 1:10 htb rate ${UPLINK}kbit \ burst 6k prio 1# bulk & default class 1:20 - gets slightly less traffic, # and a lower priority:tc class add dev $DEV parent 1:1 classid 1:20 htb rate $[9*$UPLINK/10]kbit \ burst 6k prio 2# both get Stochastic Fairness:tc qdisc add dev $DEV parent 1:10 handle 10: sfq perturb 10tc qdisc add dev $DEV parent 1:20 handle 20: sfq perturb 10# TOS Minimum Delay (ssh, NOT scp) in 1:10:tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \ match ip tos 0x10 0xff flowid 1:10# ICMP (ip protocol 1) in the interactive class 1:10 so we # can do measurements & impress our friends:tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \ match ip protocol 1 0xff flowid 1:10# To speed up downloads while an upload is going on, put ACK packets in# the interactive class:tc filter add dev $DEV parent 1: protocol ip prio 10 u32 \ match ip protocol 6 0xff \ match u8 0x05 0x0f at 0 \ match u16 0x0000 0xffc0 at 2 \ match u8 0x10 0xff at 33 \ flowid 1:10# rest is 'non-interactive' ie 'bulk' and ends up in 1:20########## downlink ############## slow downloads down to somewhat less than the real speed to prevent # queuing at our ISP. Tune to see how high you can set it.# ISPs tend to have *huge* queues to make sure big downloads are fast## attach ingress policer:tc qdisc add dev $DEV handle ffff: ingress# filter *everything* to it (0.0.0.0/0), drop everything that's# coming in too fast:tc filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip src \ 0.0.0.0/0 police rate ${DOWNLINK}kbit burst 10k drop flowid :1