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. 

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