sudo iptables -I INPUT -p tcp --dport 9000 -j DROP 


  def x(p):
    p.src='00:1C:23:1E:4E:5A'
    p.dst='00:03:25:19:7C:B8'
    p.payload.src='10.0.0.20'
    p.payload.dst='10.0.0.17'
    p.payload.chksum=None
    p.payload.payload.chksum=None
    sendp(p.build())
  
  sniff(filter='tcp and src 0.0.0.0',prn=x)

  def x(p):
    p.src='00:1C:23:1E:4E:5A'
    p.dst='00:18:84:17:C2:98'
    p.payload.dst='10.0.0.88'
    p.payload.src='10.0.0.20'
    p.payload.chksum=None
    p.payload.payload.chksum=None
    sendp(p)
  
  sniff(filter='tcp and src 10.0.0.17',prn=x)