#!/usr/local/bin/ruby

ip = ARGV[0]
raise "Pass in an IP" if !ip
`/sbin/service denyhosts stop`
data = File.read("/etc/hosts.deny").split("\n")
File.open("/etc/hosts.deny", "w") do |f|
  data.each do |line|
    f.syswrite(line + "\n") unless line =~ /#{ip}/
  end
end
`echo "#{ip}" >> /usr/share/denyhosts/data/allowed-hosts` 
`/sbin/service denyhosts start`