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@rendicott rendicott/check_port.py
Last active Mar 30, 2017

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quick script to use to check whether or not a port is open using python standard library, good for when telnet is unavailable and it's too much trouble to install it
#!/usr/bin/env python
'''
quick script to use to check whether or not a port is open using python standard library,
good for when telnet is unavailable and it's too much trouble to install it
Usage: ./check_port.py 127.0.0.1 5601
Thanks to mrjandro on SO
http://stackoverflow.com/questions/19196105/python-how-to-check-if-a-network-port-is-open-on-linux
sample output:
{"exit_code": 1, "results": "Port not open", "port": 5672, "host_ip": "['11.22.111.200']", "address": "internal-lb-1912362693.us-east-1.elb.amazonaws.com"}
{"exit_code": 0, "results": "Port open", "port": 443, "host_ip": "['11.22.111.200']", "address": "www.google.com"}
'''
import socket;
import sys
import json
ip = sys.argv[1]
prt = sys.argv[2]
hostips = [x for x in socket.gethostbyname_ex(socket.gethostname())[2] if not x.startswith("127.")][:1]
dresult = {'address': ip, 'port': 0, 'results': '', 'exit_code': 1, 'host_ips': hostips}
def dumpresult(d):
print(json.dumps(d))
try:
int_prt = int(prt)
dresult['port'] = int_prt
except:
msg = ("Error processing port number, is it a number?")
dresult['results'] = msg
dumpresult(dresult)
sys.exit(1)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.settimeout(2)
result = sock.connect_ex((ip,int_prt))
if result == 0:
msg = "Port open"
dresult['results'] = msg
dresult['exit_code'] = 0
dumpresult(dresult)
sys.exit(0)
else:
msg = "Port not open"
dresult['results'] = msg
dresult['exit_code'] = 1
dumpresult(dresult)
sys.exit(1)
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