This describes traffic shaping under linux. This uses the __tc__ (traffic 

  

 LinuxKernel .config file, you will probably need support for the 

 following: 

 # CONFIG_NET_SCHED 

 # CONFIG_NET_SCH_CBQ (support for the cbq class, used in this script) 

  

 If I look at the output of wget, its reasonably good at limiting a port 80 download to 10 - 12k/second, which is about right for what we asked. If i look at my ppp0 usage meter in gkrellm, it seems to be using more bandwidth than it should - spends a lot of time at 16 or 17 K/s incoming. Running iptraf on ppp0, in detailed statistics mode, shows that my incoming rate seems to be about 100kbit/sec, although it tends to be a bit higher than this normally. I also tested, and verified, that traffic not caught by the above script - eg, FTP traffic, still obtained full rate 

  

 In comparison with a by-port filter such as the one prior to the ingress script, I see a high level of fluctuation in the download rate, in all three test cases. Whether this is to do with some misconfiguration on my part I dont know.