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check-dnsbl.py
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check-dnsbl.py
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#!/usr/bin/env python3
# 2016, Georg Sauthoff <[email protected]>, GPLv3+
import argparse
import csv
# require dnspython >= 1.15
# because of: https://github.com/rthalley/dnspython/issues/206
import dns.resolver
import dns.reversename
import itertools
import logging
import re
import sys
import time
ipv6_incapable = { 'bl.0spam.org', 'rbl.0spam.org', 'nbl.0spam.org' }
default_blacklists = [
('zen.spamhaus.org' , 'Spamhaus SBL, XBL and PBL' , 'https://www.spamhaus.org' ),
('ix.dnsbl.manitu.net' , 'Heise iX NiX Spam' , 'https://www.nixspam.net' ),
('truncate.gbudb.net' , 'Exclusively Spam/Malware' , 'http://www.gbudb.com/truncate/' ),
# accepts de-listing payments, overblocking
# https://en.wikipedia.org/w/index.php?title=Comparison_of_DNS_blacklists&oldid=1169665628#Suspect_RBL_providers
('dnsbl-1.uceprotect.net' , 'Trapserver Cluster' , 'https://www.uceprotect.net' ),
('psbl.surriel.com' , 'passive list, easy to unlist' , 'https://psbl.org' ),
('db.wpbl.info' , 'Weighted private' , 'http://wpbl.info' ),
('bl.spamcop.net' , 'Based on spamcop users' , 'https://www.spamcop.net' ),
# spamrats doesn't serve DNS servers of hosting providers such as hetzner
('dyna.spamrats.com' , 'Dynamic IP addresses' , 'https://www.spamrats.com/' ),
('spam.spamrats.com' , 'Manual submissions' , 'https://www.spamrats.com/' ),
('auth.spamrats.com' , 'Suspicious authentications' , 'https://www.spamrats.com/' ),
('bl.blocklist.de' , 'fail2ban reports etc.' , 'https://www.blocklist.de' ),
('all.s5h.net' , 'traps' , 'https://www.usenix.org.uk/content/rbl.html'),
('b.barracudacentral.org' , 'traps' , 'http://www.barracudacentral.org/rbl'),
# also returns white-listed entries with return code 127.0.0.1
('hostkarma.junkemailfilter.com', 'Autotected Virus Senders' , 'https://wiki.junkemailfilter.com'),
('bl.0spam.org' , 'Main 0spam DNSBL' , 'https://0spam.org' ),
('rbl.0spam.org' , 'Main 0spam realtime BL' , 'https://0spam.org' ),
('nbl.0spam.org' , '0spam network BL' , 'https://0spam.org' ),
('bl.nordspam.com' , 'NordSpam IP addresses' , 'https://www.nordspam.com/usage/' ),
# doesn't list 127.0.0.2 RFC 5782 mandatory test entry
('combined.mail.abusix.zone' , 'Abusix aggregated' , 'https://abu.sx/combined' ),
# seems to include dnsbl-1.uceprotect.net
('black.dnsbl.brukalai.lt' , 'Brukalai.lt junk mail' , 'https://www.brukalai.lt' ),
('light.dnsbl.brukalai.lt' , 'Brukalai.lt abuse' , 'https://www.brukalai.lt' ),
('bip.virusfree.cz' , 'botnet IP addresses' , 'https://www.virusfree.cz/en/' ),
('bad.virusfree.cz' , 'high spam rate/malware senders' , 'https://www.virusfree.cz/en/' ),
('rbl.mailspike.org' , 'whatever' , 'https://mailspike.org' ),
('rbl.metunet.com' , 'whatever' , 'https://rbl.metunet.com' ),
('all.spam-rbl.fr' , 'French DNSBL' , 'https://spam-rbl.fr/rbl.php' ),
('bl.drmx.org' , 'traps and provider feedback' , 'http://drmx.org/' ),
('bl.spameatingmonkey.net' , 'traps and policy' , 'https://spameatingmonkey.com/services'),
('backscatter.spameatingmonkey.net', 'backscatter to traps' , 'https://spameatingmonkey.com/services'),
('bl.ipv6.spameatingmonkey.net', 'traps and policy for ipv6' , 'https://spameatingmonkey.com/services'),
('netbl.spameatingmonkey.net', 'low reputation networks' , 'https://spameatingmonkey.com/services'),
('bogons.cymru.com' , 'unallocated netblocks' , 'https://www.team-cymru.com/bogon-networks'),
('combined.rbl.msrbl.net' , 'traps, virus scanners etc.' , 'https://www.msrbl.com' ),
('dnsbl.justspam.org' , 'whatever' , 'http://www.justspam.org/usage' ),
('dnsbl.madavi.de' , 'website comment spam' , 'https://www.madavi.de/madavibl/' ),
('dnsbl.rv-soft.info' , 'whatever from czech repuplic' , 'http://dnsbl.rv-soft.info' ),
('dnsbl.zapbl.net' , 'traps and admin choice' , 'https://zapbl.net/using' ),
# doesn't list 127.0.0.2 RFC 5782 mandatory test entry
('dnsrbl.swinog.ch' , 'traps' , 'https://antispam.imp.ch' ),
('spamrbl.swinog.ch' , 'IP addresses included in spam' , 'https://antispam.imp.ch' ),
('korea.services.net' , 'korean networks minus whitelisted' , 'http://korea.services.net' ),
('mail-abuse.blacklist.jippg.org', 'whatever from japan' , 'http://blacklist.jippg.org' ),
('rbl.blockedservers.com' , 'whatever' , 'https://www.blockedservers.com' ),
('spam.rbl.blockedservers.com' , 'whatever' , 'https://www.blockedservers.com' ),
('netscan.rbl.blockedservers.com', 'whatever' , 'https://www.blockedservers.com' ),
('torexit.rbl.blockedservers.com', 'whatever' , 'https://www.blockedservers.com' ),
# doesn't list 127.0.0.2 RFC 5782 mandatory test entry
('pofon.foobar.hu' , 'the fast-expiration spambot-network DNSBL', 'https://rbl.foobar.hu' ),
('rbl.abuse.ro' , 'spamtraps' , 'https://abuse.ro' ),
('pbl.abuse.ro' , 'spamtraps' , 'https://abuse.ro' ),
('rbl.efnetrbl.org' , 'BL for IRC servers' , 'https://rbl.efnetrbl.org' ),
('rbl.schulte.org' , 'personal blocklist' , 'https://rbl.schulte.org' ),
('spam.dnsbl.anonmails.de' , 'whatever' , 'https://anonmails.de/dnsbl.php' ),
('spam.pedantic.org' , 'personal blocklist' , 'http://pedantic.org' ),
('spamsources.fabel.dk' , 'whatever' , 'https://www.spamsources.fabel.dk'),
('tor.dan.me.uk' , 'tor nodes - exit and others' , 'https://www.dan.me.uk/dnsbl' ),
('torexit.dan.me.uk' , 'tor exit nodes' , 'https://www.dan.me.uk/dnsbl' ),
('bl.scientificspam.net' , 'scientifc spam specific traps' , 'https://www.scientificspam.net' ),
('bl.suomispam.net' , 'finish language spam' , 'https://suomispam.net' ),
('gl.suomispam.net' , 'finish language spam - gray list' , 'https://suomispam.net' ),
('dnsblchile.org' , 'whatever from chile' , 'https://www.dnsblchile.org' ),
('free.v4bl.org' , 'whatever' , 'https://v4bl.org' ),
# Spanish academic and research network
('weak.dnsbl.rediris.es' , 'traps and aggregation with other lists', 'https://www.rediris.es/irisrbl/'),
('strong.dnsbl.rediris.es' , 'traps and aggregation with other lists', 'https://www.rediris.es/irisrbl/'),
('netblockbl.spamgrouper.to' , 'bad networks' , 'http://www.spamgrouper.to' ),
('singular.ttk.pte.hu' , 'traps, stats and user reports' , 'https://singular.ttk.pte.hu/en/' ),
('bl.nosolicitado.org' , 'whatever' , 'https://www.nosolicitado.org' ),
('bl.worst.nosolicitado.org' , 'whatever' , 'https://www.nosolicitado.org' ),
('dnsbl.beetjevreemd.nl' , 'personal curated blocklist' , 'https://www.beetjevreemd.nl/dnsbl/'),
('dnsbl.dronebl.org' , 'whatever' , 'https://dronebl.org' ),
('ip4.bl.zenrbl.pl' , 'some polish bl' , 'https://multirbl.valli.org/detail/ip4.bl.zenrbl.pl.html'),
# offer paid list removal ($ 50)
# https://www.mailcleaner.net/support/request-removal-from-mailcleaner-uribl/
('iprbl.mailcleaner.net' , 'whatever' , 'https://multirbl.valli.org/detail/iprbl.mailcleaner.net.html'),
('rbl.interserver.net' , 'whatever' , 'http://rbl.interserver.net/usage.php'),
('rbl.ircbl.org' , 'IRC abuse blacklist' , 'https://ircbl.org/about' ),
('rbl.rbldns.ru' , 'some russian blocklist' , 'http://rbldns.ru/index.php/en/technical-recommendations.html'),
('reputation-ip.rbl.scrolloutf1.com', 'whatever' , 'http://www.scrolloutf1.com/rbl' ),
('bl.fmb.la' , 'whatever' , 'https://fmb.la/pages/about' ),
('bl.rbl.polspam.pl' , 'some polish blacklist' , 'https://polspam.pl/rbll.php' ),
('bl6.rbl.polspam.pl' , 'some polish blacklist' , 'https://polspam.pl/rbll.php' ),
('nsbl.ascams.com' , 'whatever' , 'https://ascams.com/info/dnsbl-ascams-com/'),
('bl.octopusdns.com' , 'whatever' , 'https://octopusrbl.monster/' ),
('dnsbl.calivent.com.pe' , 'some peruan blacklist' , 'http://dnsbl.calivent.com.pe' ),
('openproxy.bls.digibase.ca' , 'whatever' , 'http://bls.digibase.ca/DNSBL' ),
('proxyabuse.bls.digibase.ca' , 'whatever' , 'http://bls.digibase.ca/DNSBL' ),
('spambot.bls.digibase.ca' , 'whatever' , 'http://bls.digibase.ca/DNSBL' ),
('bl.mxrbl.com' , 'whatever' , 'https://mxrbl.com' ),
]
# blacklists disabled by default because they return mostly garbage
garbage_blacklists = [
# The spfbl.net operator doesn't publish clear criteria that lead to a
# blacklisting.
# When an IP address is blacklisted the operator can't name a specific
# reason for the blacklisting. The blacklisting details page just names
# overly generic reasons like:
# 'This IP was flagged due to misconfiguration of the e-mail service or
# the suspicion that there is no MTA at it.'
# When contacting the operator's support, they can't back up such
# claims.
# There are additions of IP addresses to the spfbl.net blacklist that
# have a properly configured MTA running and that aren't listed in any
# other blacklist. Likely, those additions are caused by a bug in the
# spfbl.net update process. But their support is uninterested in
# improving that process. Instead they want to externalize maintenance
# work by asking listed parties to waste some time on their manual
# delisting process.
# Suspiciously, you can even whitelist your listed address via
# transferring $ 1.50 via PayPal. Go figure.
# Thus, the value of querying this blacklist is utterly low as
# you get false-positive results, very likely.
('dnsbl.spfbl.net' , 'Reputation Database' ),
# offers paid delisting, violates RFC 5782 by listing 127.0.0.1 test entry
# and NOT listing 127.0.0.2 ...
# seems to be a fraudulent operation:
# https://www.spamhaus.org/organization/statement/008/fraudulent-fake-dnsbl-uncovered-nszones.com
('bl.nszones.com' , 'dynamic IP addresses etc.' ),
# references outdated contact information
# DNSBL contains stale entries/false positives
# doesn't list 127.0.0.2 RFC 5782 mandatory test entry
('vote.drbl.gremlin.ru' , 'distributed blacklist' ),
# doesn't list 127.0.0.2 RFC 5782 mandatory test entry
('work.drbl.gremlin.ru' , 'distributed blacklist aggregation'),
]
# See also:
# https://en.wikipedia.org/wiki/DNSBL
# https://tools.ietf.org/html/rfc5782
# https://en.wikipedia.org/wiki/Comparison_of_DNS_blacklists
# some lists provide detailed stats, i.e. the actual listed addresses
# useful for testing
default_domain_blacklists = [
('dbl.spamhaus.org', 'Spamhaus DBL', 'https://www.spamhaus.org/dbl/'),
('hostkarma.junkemailfilter.com', 'Hostkarma DBL', 'https://wiki.junkemailfilter.com/index.php/Spam_DNS_Lists#Name_Based_Lookups'),
('dbl.0spam.org' , '0spam URLBL' , 'https://0spam.org' ),
('dbl.nordspam.com', 'NordPM URIBL', 'https://www.nordspam.com/usage/'),
('dblack.mail.abusix.zone', 'Abusix URIBL', 'https://abu.sx/dblack' ),
('black.dnsbl.brukalai.lt', 'Brukalai also lists domains', 'https://www.brukalai.lt'),
('uribl.spameatingmonkey.net', 'Spameatingmonkey URIBL', 'https://spameatingmonkey.com/services'),
('urired.spameatingmonkey.net', 'Spameatingmonkey likely URIBL (includes uribl)', 'https://spameatingmonkey.com/services'),
('rhsbl.zapbl.net' , 'whatever', 'https://zapbl.net/using'),
('uribl.swinog.ch' , 'realtime URL blacklist', 'https://antispam.imp.ch'),
('uribl.pofon.foobar.hu', 'URIBL', 'https://rbl.foobar.hu' ),
('uribl.abuse.ro' , 'spamvertized domains', 'https://abuse.ro' ),
('dbl.abuse.ro' , 'spam sending domains', 'https://abuse.ro' ),
('rhsbl.scientificspam.net', 'whatever', 'https://www.scientificspam.net'),
('dbl.suomispam.net', 'Finish DBL', 'https://suomispam.net'),
# offer paid list removal ($ 50)
# https://www.mailcleaner.net/support/request-removal-from-mailcleaner-uribl/
('uribl.mailcleaner.net', 'Pay for removal URIBL', 'https://multirbl.valli.org/detail/uribl.mailcleaner.net.html'),
('rbluri.interserver.net', 'whatever', 'http://rbl.interserver.net/usage.php'),
('bl-domain.rbl.scrolloutf1.com', 'whatever', 'http://www.scrolloutf1.com/rbl'),
('UnsafeSenders.rbl.scrolloutf1.com', 'whatever', 'http://www.scrolloutf1.com/rbl'),
('bl.fmb.la', 'BL also contains domains', 'https://fmb.la/pages/about'),
('short.fmb.la', 'URL shortener domain', 'https://fmb.la/pages/about'),
('rhsbl.rbl.polspam.pl', 'Polish DBL', 'https://polspam.pl/rbll.php'),
('rhsbl-h.rbl.polspam.pl', 'Polish URIBL', 'https://polspam.pl/rbll.php'),
('rhsbl-v.rbl.polspam.pl', 'Polish URIBL for suspicious URI', 'https://polspam.pl/rbll.php'),
('rhsbl-danger.rbl.polspam.pl', 'Polish DBL of dangerous domains', 'https://polspam.pl/rbll.php'),
]
log_format = '%(asctime)s - %(levelname)-8s - %(message)s [%(name)s]'
log_date_format = '%Y-%m-%d %H:%M:%S'
## Simple Setup
# Note that the basicConfig() call is a NOP in Jupyter
# because Jupyter calls it before
logging.basicConfig(format=log_format, datefmt=log_date_format, level=logging.ERROR)
log = logging.getLogger(__name__)
def mk_arg_parser():
p = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
description = 'Check if mailservers are in any blacklist (DNSBL)',
epilog='''Don't panic if a server is listed in some blacklist.
See also https://en.wikipedia.org/wiki/Comparison_of_DNS_blacklists for the
mechanics and policies of the different lists.
2016, Georg Sauthoff <[email protected]>, GPLv3+''')
p.add_argument('dests', metavar='DESTINATION', nargs='*',
help = 'servers, a MX lookup is done if it is a domain')
p.add_argument('--bl', action='append', default=[],
help='add another blacklist')
p.add_argument('--bl-file', help='read more DNSBL from a CSV file')
p.add_argument('--clear', action='store_true',
help='clear default list of DNSBL')
# https://blog.cloudflare.com/dns-resolver-1-1-1-1/
p.add_argument('--cloudflare', action='store_true',
help="use Cloudflare's public DNS nameservers")
p.add_argument('--debug', action='store_true',
help='print debug log messages')
p.add_argument('--verbose', '-v', action='store_true',
help='print warnings')
# cf. https://en.wikipedia.org/wiki/Google_Public_DNS
p.add_argument('--google', action='store_true',
help="use Google's public DNS nameservers")
p.add_argument('--rev', action='store_true', default=True,
help='check reverse DNS record for each domain (default: on)')
p.add_argument('--mx', action='store_true', default=True,
help='try to folow MX entries')
p.add_argument('--address', action='store_true', default=True,
help='check IP addresses against IP DNSBL (default: on)')
p.add_argument('--domain', action='store_true', default=True,
help='check domains also against DBLS (default: on)')
p.add_argument('--no-mx', dest='mx', action='store_false',
help='ignore any MX records')
p.add_argument('--no-rev', action='store_false', dest='rev',
help='disable reverse DNS checking')
p.add_argument('--no-domain', action='store_false', dest='domain',
help='disable DBL checking')
p.add_argument('--no-address', action='store_false', dest='address',
help='disable IP address blacklist checking')
p.add_argument('--ns', action='append', default=[],
help='use one or more alternate nameserverse')
# cf. https://en.wikipedia.org/wiki/OpenDNS
p.add_argument('--opendns', action='store_true',
help="use Cisco's public DNS nameservers")
# cf. https://quad9.net/faq/
p.add_argument('--quad9', action='store_true',
help="use Quad9's public DNS nameservers (i.e. the filtering ones)")
p.add_argument('--retries', type=int, default=5,
help='Number of retries if request times out (default: 5)')
p.add_argument('--with-garbage', action='store_true',
help=('also include low-quality blacklists that are maintained'
' by clueless operators and thus easily return false-positives'))
p.add_argument('--check-lists', action='store_true',
help='check lists for mandatory RFC 5782 test entries')
return p
def parse_args(*a):
p = mk_arg_parser()
args = p.parse_args(*a)
args.bls = default_blacklists
args.dbls = default_domain_blacklists
if args.clear:
args.bls = []
for bl in args.bl:
args.bls.append((bl, ''))
if args.bl_file:
args.bls = args.bls + read_csv_bl(args.bl_file)
if args.with_garbage:
args.bls.extend(garbage_blacklists)
if args.google:
args.ns = args.ns + ['8.8.8.8', '2001:4860:4860::8888', '8.8.4.4', '2001:4860:4860::8844']
if args.opendns:
args.ns = args.ns + ['208.67.222.222', '2620:0:ccc::2', '208.67.220.220', '2620:0:ccd::2']
if args.cloudflare:
args.ns += ['1.1.1.1', '2606:4700:4700::1111', '1.0.0.1', '2606:4700:4700::1001']
if args.quad9:
args.ns += ['9.9.9.9', '2620:fe::fe', '149.112.112.112', '2620:fe::9']
if args.ns:
dns.resolver.default_resolver = dns.resolver.Resolver(configure=False)
dns.resolver.default_resolver.nameservers = args.ns
if args.debug:
l = logging.getLogger() # root logger
l.setLevel(logging.DEBUG)
elif args.verbose:
l = logging.getLogger() # root logger
l.setLevel(logging.INFO)
if not args.dests and not args.check_lists:
raise RuntimeError('supply either destinations or --check-lists')
return args
def read_csv_bl(filename):
with open(filename, newline='') as f:
reader = csv.reader(f)
xs = [ row for row in reader
if len(row) > 0 and not row[0].startswith('#') ]
return xs
v4_ex = re.compile('^[.0-9]+$')
v6_ex = re.compile('^[:0-9a-fA-F]+$')
def get_addrs(dest, mx=True):
if v4_ex.match(dest) or v6_ex.match(dest):
return [ (dest, None) ], []
domains = [ dest ]
ds = [ dest ]
if mx:
try:
r = dns.resolver.resolve(dest, 'mx', search=False)
domains = [ answer.exchange for answer in r ]
ds.extend(domains)
log.debug('destinatin {} has MXs: {}'
.format(dest, ', '.join([str(d) for d in domains])))
except dns.resolver.NoAnswer:
pass
addrs = []
for domain in domains:
for t in ['a', 'aaaa']:
try:
r = dns.resolver.resolve(domain, t, search=False)
except dns.resolver.NoAnswer:
continue
xs = [ ( answer.address, domain ) for answer in r ]
addrs = addrs + xs
log.debug('domain {} has addresses: {}'
.format(domain, ', '.join([x[0] for x in xs])))
if not addrs:
raise ValueError("There isn't any a/aaaa DNS record for {}".format(domain))
return addrs, ds
def check_dbl(domain, bl):
t = str(domain)
if t.endswith('.'):
d = t + bl
else:
d = f'{t}.{bl}'
try:
v = dns.resolver.resolve(d, 'a', search=False)
except (dns.resolver.NXDOMAIN, dns.resolver.NoNameservers, dns.resolver.NoAnswer):
return None
try:
w = dns.resolver.resolve(d, 'txt', search=False)
except (dns.resolver.NXDOMAIN, dns.resolver.NoNameservers, dns.resolver.NoAnswer):
w = []
s = ','.join(f'{a} ({t})' for a, t in itertools.zip_longest(v, w, fillvalue=''))
m = f'OMG, {domain} is listed in DBL {bl}: {s}'
return m
def check_dnsbl(addr, bl):
rev = dns.reversename.from_address(addr)
domain = str(rev.split(3)[0]) + '.' + bl
try:
r = dns.resolver.resolve(domain, 'a', search=False)
except (dns.resolver.NXDOMAIN, dns.resolver.NoNameservers, dns.resolver.NoAnswer):
return None
address = list(r)[0].address
try:
r = dns.resolver.resolve(domain, 'txt', search=False)
txt = list(r)[0].to_text()
except (dns.resolver.NoAnswer, dns.resolver.NXDOMAIN):
txt = ''
m = f'OMG, {addr} is listed in DNSBL {bl}: {address} ({txt})'
return m
def check_rdns(addrs):
errs = 0
for (addr, domain) in addrs:
if domain is None:
continue
log.debug('Check if there is a reverse DNS record that maps address {} to {}'
.format(addr, domain))
try:
r = dns.resolver.resolve(dns.reversename.from_address(addr), 'ptr', search=False)
a = list(r)[0]
target = str(a.target).lower()
source = str(domain).lower()
log.debug('Reverse DNS record for {} points to {}'.format(addr, target))
if domain and source + '.' != target and source != target:
log.error('domain {} resolves to {}, but the reverse record resolves to {}'.
format(domain, addr, target))
errs = errs + 1
except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer):
log.error('There is no reverse DNS record for {}'.format(addr))
errs = errs + 1
return errs
return errs
def check_dbls(domain, dbls, retries):
d = domain
ls = [ (bl[0], 0, 0) for bl in dbls ]
errs = 0
while ls:
bl, i, ts = ls.pop(0)
if i > 0:
now = time.clock_gettime(time.CLOCK_REALTIME)
t = max(i * 23 - max(now - ts, 0), 0)
time.sleep(t)
try:
log.debug(f'Checking if domain {d} is listed in {bl} ...')
s = check_dbl(d, bl)
if s:
errs += 1
log.error(s)
except dns.exception.Timeout as e:
if i + 1 < retries:
log.warning(f'Resolving {d} in {bl} timed out - retrying later ...')
ls.append((bl, i+1, time.clock_gettime(time.CLOCK_REALTIME)))
else:
log.warning(f'Resolving {d} in {bl} timed out - giving up on it.')
return errs
def check_bls(addrs, bls, dest, retries):
ls = [ (x[0], x[1], y, 0, 0) for x in addrs for y in bls ]
errs = 0
while ls:
addr, domain, bl, i, ts = ls.pop(0)
if i > 0:
now = time.clock_gettime(time.CLOCK_REALTIME)
t = max(i * 23 - max(now - ts, 0), 0)
time.sleep(t)
try:
if ':' in addr and bl[0] in ipv6_incapable:
log.debug(f"Ignoring {bl[0]} because it doesn't support IPv6 ({addr})")
continue
log.debug(f'Checking if address {addr} (via {dest}) is listed in {bl[0]} ({bl[1]})')
s = check_dnsbl(addr, bl[0])
if s:
errs += 1
log.error(s)
except dns.exception.Timeout as e:
if i + 1 < retries:
log.warning(f'Resolving {addr} in {bl[0]} timed out - retrying later ...')
ls.append((addr, domain, bl, i+1, time.clock_gettime(time.CLOCK_REALTIME)))
else:
log.warning(f'Resolving {addr} in {bl[0]} timed out - giving up on it.')
return errs
def check_domain_lists(dbls):
errs = 0
for d in dbls:
bl = d[0]
log.debug(f'Checking {bl}')
s = check_dbl('test', bl)
if s is None:
log.error(f'OMG, mandatory "test" name is NOT listed in DBL {bl}')
errs += 1
s = check_dbl('invalid', bl)
if s:
log.error(s)
errs += 1
return errs
def check_addr_lists(bls):
errs = 0
for bl, blv, _ in bls:
try:
s = check_dnsbl('127.0.0.1', bl)
if s:
log.error(s)
errs += 1
s = check_dnsbl('127.0.0.2', bl)
if not s:
log.error(f'OMG, mandatory 127.0.0.2 is NOT listed in DNSBL {bl}')
errs += 1
except dns.exception.Timeout as e:
log.error(f'Resolving mandatory entries timed out on {bl}')
return errs
def run(args):
if args.check_lists:
return ( (check_addr_lists (args.bls ) if args.address else 0)
+ (check_domain_lists(args.dbls) if args.domain else 0) != 0 )
errs = 0
if args.address:
log.debug(f'Checking {len(args.bls)} DNS blacklists')
if args.domain:
log.debug(f'Checking {len(args.dbls)} domain based DNS blacklist')
for dest in args.dests:
addrs, domains = get_addrs(dest, mx=args.mx)
if args.address:
if args.rev:
errs = errs + check_rdns(addrs)
e = check_bls(addrs, args.bls, dest, args.retries)
if e:
log.error(f'{dest} is listed in {e} blacklists')
errs += e
if args.domain:
for d in domains:
e = check_dbls(d, args.dbls, args.retries)
if e:
log.error(f'{d} is listed {e} blacklists')
errs += e
return errs != 0
def main(*a):
args = parse_args(*a)
return run(args)
if __name__ == '__main__':
if 'IPython' in sys.modules:
# do something different when running inside a Jupyter notebook
pass
else:
try:
sys.exit(main())
except Exception as e:
log.error(e)
sys.exit(1)