Creates a slow network connection

slownet.rb

#!/usr/bin/env ruby

print "Enter desired network speed (Kbit/s, e.g. 2000): "
speed = gets.strip.to_i
print "Enter desired latency (ms, e.g. 10): "
latency = gets.strip.to_i
print "Enter desired duration (how long do you want me to screw with your internet in seconds, e.g. 60): "
seconds = gets.strip.to_i
`sudo ipfw pipe 1 config bw #{speed}Kbits/s delay #{latency}ms`
`sudo ipfw add 1 pipe 1 src-port 80`
`sudo ipfw add 2 pipe 1 dst-port 80`
puts "Try your new slower network. Will destroy it in #{seconds} seconds."
(1..seconds).each do |s|
  sleep(1)
  print '.'
  print s if s % 10 == 0
end
`sudo ipfw delete 1`
`sudo ipfw delete 2`
`sudo ipfw pipe 1 delete`