Cisco Scanner

#!/usr/bin/env python
#
# Python Cisco Scanner
#EDUCATIONAL USE ONLY.
#

from socket import *
import threading

print "Cisco Router Scanner."
target,output = (raw_input("Class C IP: "), raw_input("Logfile: "))
f = open(output, 'w')
for i in range(1, 255):
        t = target + '.' + str(i)
        setdefaulttimeout(0.5)
        s = socket(AF_INET,SOCK_STREAM)
        try:
                print "Trying %s\r" % (t,)
                s.connect((t, 22))
                data = s.recv(3)
                s.close()
                print t
                print data
                if data == "":
                        f.write("Cisco router found at: %s\n" % (t,))
        except Exception,e:
                s.close()
f.close()