Skip to content

Instantly share code, notes, and snippets.

@fqrouter
Created January 14, 2013 14:34
Show Gist options
  • Save fqrouter/4530465 to your computer and use it in GitHub Desktop.
Save fqrouter/4530465 to your computer and use it in GitHub Desktop.
dig @8.8.8.8 twitter.com
import sys
import subprocess
# source http://zh.wikipedia.org/wiki/%E5%9F%9F%E5%90%8D%E6%9C%8D%E5%8A%A1%E5%99%A8%E7%BC%93%E5%AD%98%E6%B1%A1%E6%9F%93
WRONG_ANSWERS = {
'4.36.66.178',
'8.7.198.45',
'37.61.54.158',
'46.82.174.68',
'59.24.3.173',
'64.33.88.161',
'64.33.99.47',
'64.66.163.251',
'65.104.202.252',
'65.160.219.113',
'66.45.252.237',
'72.14.205.99',
'72.14.205.104',
'78.16.49.15',
'93.46.8.89',
'128.121.126.139',
'159.106.121.75',
'169.132.13.103',
'192.67.198.6',
'202.106.1.2',
'202.181.7.85',
'203.161.230.171',
'207.12.88.98',
'208.56.31.43',
'209.36.73.33',
'209.145.54.50',
'209.220.30.174',
'211.94.66.147',
'213.169.251.35',
'216.221.188.182',
'216.234.179.13'
}
rules = ['-p udp --sport 53 -m u32 --u32 "4 & 0x1FFF = 0 && 0 >> 22 & 0x3C @ 8 & 0x8000 = 0x8000 && 0 >> 22 & 0x3C @ 14 = 0" -j DROP']
for wrong_answer in WRONG_ANSWERS:
hex_ip = ' '.join(['%02x' % int(s) for s in wrong_answer.split('.')])
rules.append('-p udp --sport 53 -m string --algo bm --hex-string "|%s|" --from 60 --to 180 -j DROP' % hex_ip)
try:
for rule in rules:
print(rule)
subprocess.call('iptables -I INPUT %s' % rule, shell=True)
print('running..')
sys.stdin.readline()
except KeyboardInterrupt:
print('bye')
finally:
for rule in reversed(rules):
subprocess.call('iptables -D INPUT %s' % rule, shell=True)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment