Take the tour ×  I've played around with the ipfw command on a
Mac and tried to limit the bandwidth to 1MBit/s.  sudo ipfw add
pipe 1 ip from any to me sudo ipfw pipe 1 config bw 1MBit/s
These are the statements I'm using. ipfw indeed limits the
bandwidth drastically but according to speedtest.net only to
~7.7 Mbps on a 100 Mbps line. With a restriction to 3MBit/s the
effective download is ~23.13 Mbps. Apparently the ipfw always
uses a factor ~7.7 of the given limit. With a limit of 4 Mbps
the effective speed is ~30,84 Mbps, with 8 Mbps it's ~61.6 Mbps
and so on...  Anyone knows why this is the reason? Is it a bug
or do I use the statement wrong?  Thank you  share|improve this
question I'm also interested if anyone else can reproduce this
or if it's an issue on my side. –  TheLostOne Mar 30 '12 at
18:31 Can you sudo ipfw show here? –  Kondybas Apr 2 '12 at
22:58 @Kondybas radi:~ Phil$ sudo ipfw show 00100 2046813
1042400871 pipe 1 ip from any to me 00200 2223777 296348885 pipe
2 ip from me to any 65535 71829