port scan shell script

Shell Programming and Scripting
1

Hi,

Can any one please suggest me commands for making port scan shell script.

2

port scan is not usually a good thing , why do you need this ?

3

Hi,

I need this for monitoring the server ports. If any of the port seems to be down then send the alert using mail or message

4

I got this little script from Ghostdog74 from our forum, modified it a bit to suit my needs :

#!/usr/bin/python

import socket
import sys

if ( len(sys.argv) != 2 ):
    print "Usage: " + sys.argv[0] + " you must enter IP or FQDN as argument"
    sys.exit(1)

remote_host = sys.argv[1]

for remote_port in [21,22,23,80,139,139,389,443,445,3128,3306,3389]:
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.settimeout(20)
        try:
                sock.connect((remote_host, remote_port))
        except Exception,e:
                print "%d closed " % remote_port
        else:
                print "%d open" % remote_port
        sock.close()
  • change the ports as you wish.
    Implementing nmap for ports monitoring is also good idea.