Created
October 24, 2015 12:09
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Alternative for fail2ban fake gooblebot detection when getting the error ImportError: No module named fail2ban.server.filter
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#!/usr/bin/python | |
# Inspired by https://isc.sans.edu/forums/diary/When+Google+isnt+Google/15968/ | |
# | |
# Written in Python to reuse built-in Python batteries and not depend on | |
# presence of host and cut commands | |
# | |
import sys | |
import socket | |
def process_args(argv): | |
if len(argv) != 2: | |
sys.stderr.write("Please provide a single IP as an argument. Got: %s\n" | |
% (argv[1:])) | |
sys.exit(2) | |
ip = argv[1] | |
try: | |
socket.inet_aton(ip) | |
# legal | |
except socket.error: | |
sys.stderr.write("Argument must be a single valid IP. Got: %s\n" | |
% ip) | |
sys.exit(3) | |
return ip | |
def is_googlebot(ip): | |
import re | |
host_res = socket.gethostbyaddr(ip) | |
if host_res: | |
host = host_res[0] | |
sys.exit(0 if (host and re.match('crawl-.*\.googlebot\.com', host)) els$ | |
else: | |
sys.exit(1) | |
if __name__ == '__main__': | |
is_googlebot(process_args(sys.argv)) |
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