Crack_Scapy_SYN_Scan.py

#!/usr/bin/python

import logging
logging.getLogger("scapy.runtime").setLevel(logging.ERROR)

from scapy.all import *
import sys


if len(sys.argv) != 4:
    print "Usage - ./syn_scan.py [Target-IP] [First Port] [Last Port]"
    print "Example - ./syn_scan.py 10.0.0.5 1 100"
    print "Example will TCP SYN scan ports 1 through 100 on 10.0.0.5"
    sys.exit()
else:
 ip = sys.argv[1]
 start = int(sys.argv[2])
 end = int(sys.argv[3])

 for port in range(start,end):
    ans = sr1(IP(dst=ip)/TCP(dport=port),timeout=1,verbose =0)
    if ans == None:
        pass
    else:
        if int(ans[TCP].flags) == 18:
            print port
        else:
            pass