TCP port scanner, 1 host for an array of specified ports

10-tcp-port-scan.py

from scapy.all import *
import random
# Define end host and TCP port range
host = "www.facebook.com"
portRange = [22,23,80,443,3389]

# Send SYN with random Src Port for each Dst port
for dstPort in portRange:
	srcPort = random.randint(1025,65534)
	resp = sr1(IP(dst=host)/TCP(sport=srcPort,dport=dstPort,flags="S"),timeout=1,verbose=0)
	if (str(type(resp)) == "<type 'NoneType'>"):
		print host + ":" + str(dstPort) + " is filtered (silently dropped)."
	elif(resp.haslayer(TCP)):
	    if(resp.getlayer(TCP).flags == 0x12):
	        send_rst = sr(IP(dst=host)/TCP(sport=srcPort,dport=dstPort,flags="R"),timeout=1,verbose=0)
	        print host + ":" + str(dstPort) + " is open."
	    elif (resp.getlayer(TCP).flags == 0x14):
	        print host + ":" + str(dstPort) + " is closed."
	elif(resp.haslayer(ICMP)):
	    if(int(resp.getlayer(ICMP).type)==3 and int(resp.getlayer(ICMP).code) in [1,2,3,9,10,13]):
	        print host + ":" + str(dstPort) + " is filtered (silently dropped)."