Port scan on host IP

portscan.py

import socket
import time
from datetime import datetime

#function to use connect command for host and port
def portVerify(ipadd,port):
    soc = socket.socket()
    try:
        soc.connect((ipadd,port))
    except:
        return False
    else:
        return True

scanFile = open("ScanFile", 'w')

#user input
ipadd = input("Enter a host IP address: ")
MinRange = int(input("Enter starting port number: "))
MaxRange = int(input("Enter ending port number: "))

verify = range(MinRange,MaxRange+1,1)

#current time
now = datetime.now()
dt_format = now.strftime("%m-%d-%Y %H:%M:%S")
start = time.time()
#write current time to file
with open("ScanFile", 'a') as scanFile:
    scanFile.write("Scan started at: ")
    scanFile.write(str(dt_format))
    scanFile.write("\n")
    scanFile.write("Host: ")
    scanFile.write(ipadd)
    scanFile.write("\n")
    scanFile.close()

#verify valid ip address was entered
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

while True:
    try:
        hostIP = socket.gethostbyname(ipadd)
        print("You have entered a VALID IP address!" + "\n", "Continuing with scan...")
        break
    except:
        print("You have entered an INVALID IP address.")
        exit()
try:

    soc.connect((hostIP, 10))
#    socket.settimeout(400)
    print("This should not connnet...ALERT!!")
except socket.error as e:
    result = str(e)
#    print("Couldn't connect. Aborting.")
    print(result)
    soc.close()
except KeyboardInterrupt:
    print("You pressed CTRL + C")
    exit()
if result.startswith("[WinError 10061]"):
    print("Host is UP. SCANNING....", dt_format, "\n")
    with open("ScanFile", 'a') as scanFile:
         scanFile.write(ipadd)
         scanFile.write(" is responding.")
         scanFile.write("\n")
         scanFile.write("Scan beginning at ")
         scanFile.write(str(dt_format))
         scanFile.write("\n")
         scanFile.close()

else: #WindowsError(10060):
    print("Host is not available. Aborting scan.")
    with open("ScanFile", 'a') as scanFile:
        scanFile.write(ipadd)
        scanFile.write(" is unreachable. Aborted.")
        scanFile.write("\n")
        scanFile.write(str(dt_format))
        scanFile.write("\n")
        scanFile.close()
        exit()

#check for each port in range
for x in verify:
    if portVerify(ipadd,x):
        print("Port", x, "is OPEN")
        with open("scanFile", 'a') as scanFile:
            scanFile.write("Port ")
            scanFile.write(str(x))
            scanFile.write(" is OPEN \n")
            scanFile.close()
    else:
        print("Port", x, "is CLOSED")
        with open("scanFile", 'a') as scanFile:
            scanFile.write("Port ")
            scanFile.write(str(x))
            scanFile.write(" is CLOSED \n")
            scanFile.close()

print("Scan completed. Port range", MinRange, "-", MaxRange, "has been scanned.")

end = time.time()
duration = end - start

now = datetime.now()
dt_format = now.strftime("%m-%d-%Y %H:%M:%S")
print("Scan completed at",dt_format)
print("Total scan time: ", duration, "seconds.")
with open("ScanFile", 'a') as scanFile:
    scanFile.write("Scan completed at ")
    scanFile.write(str(dt_format))
    scanFile.write("\n")
    scanFile.write("Total scan time: ")
    scanFile.write(str(duration))
    scanFile.write(" seconds.")
    scanFile.write("\n")
    scanFile.close()