Bandwidth Throttling on OS/X

The following code is a easy way to do Traffic shaping or Bandwidth throttling on OS/X. These are functions of the build-in firewall ipfw in OS/X. With this rule you create a 24 KByte/s pipe:

sudo ipfw pipe 1 config bw 24KByte/s

then attach the pipe to a rule, ie all http (80) traffic:

sudo ipfw add 1 pipe 1 src-port 80

After you are done delete the pipe to gain normal speed:

sudo ipfw delete 1