scan port

gistfile1.py

from socket import *   

if __name__ == '__main__':  
	target = raw_input('Enter host to scan: ')  
	targetIP = gethostbyname(target)  
	print 'Starting scan on host ', targetIP  

	#scan reserved ports  
	for i in range(20, 1025):  
		s = socket(AF_INET, SOCK_STREAM)  
		result = s.connect_ex((targetIP, i))  
		if(result == 0) :  
			print 'Port %d: OPEN' % (i,)
		s.close()