[Fail2ban] Fix fail2ban container
André
parent
f368954418
commit
fe845ee56d
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@ -14,9 +14,9 @@ import json
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yes_regex = re.compile(r'([yY][eE][sS]|[yY])+$')
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if re.search(yes_regex, os.getenv('SKIP_FAIL2BAN', 0)):
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print "SKIP_FAIL2BAN=y, Skipping Fail2ban container..."
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time.sleep(31536000)
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raise SystemExit
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print "SKIP_FAIL2BAN=y, Skipping Fail2ban container..."
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time.sleep(31536000)
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raise SystemExit
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r = redis.StrictRedis(host='172.22.1.249', decode_responses=True, port=6379, db=0)
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pubsub = r.pubsub()
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@ -38,151 +38,151 @@ log = {}
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quit_now = False
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def ban(address):
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BAN_TIME = int(r.get("F2B_BAN_TIME"))
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MAX_ATTEMPTS = int(r.get("F2B_MAX_ATTEMPTS"))
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RETRY_WINDOW = int(r.get("F2B_RETRY_WINDOW"))
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WHITELIST = r.hgetall("F2B_WHITELIST")
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BAN_TIME = int(r.get("F2B_BAN_TIME"))
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MAX_ATTEMPTS = int(r.get("F2B_MAX_ATTEMPTS"))
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RETRY_WINDOW = int(r.get("F2B_RETRY_WINDOW"))
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WHITELIST = r.hgetall("F2B_WHITELIST")
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ip = ipaddress.ip_address(address.decode('ascii'))
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if type(ip) is ipaddress.IPv6Address and ip.ipv4_mapped:
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ip = ip.ipv4_mapped
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address = str(ip)
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if ip.is_private or ip.is_loopback:
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return
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ip = ipaddress.ip_address(address.decode('ascii'))
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if type(ip) is ipaddress.IPv6Address and ip.ipv4_mapped:
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ip = ip.ipv4_mapped
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address = str(ip)
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if ip.is_private or ip.is_loopback:
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return
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self_network = ipaddress.ip_network(address.decode('ascii'))
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if WHITELIST:
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for wl_key in WHITELIST:
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wl_net = ipaddress.ip_network(wl_key.decode('ascii'), False)
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if wl_net.overlaps(self_network):
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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log['message'] = "Address %s is whitelisted by rule %s" % (self_network, wl_net)
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Address %s is whitelisted by rule %s" % (self_network, wl_net)
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return
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self_network = ipaddress.ip_network(address.decode('ascii'))
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if WHITELIST:
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for wl_key in WHITELIST:
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wl_net = ipaddress.ip_network(wl_key.decode('ascii'), False)
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if wl_net.overlaps(self_network):
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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log['message'] = "Address %s is whitelisted by rule %s" % (self_network, wl_net)
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Address %s is whitelisted by rule %s" % (self_network, wl_net)
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return
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net = ipaddress.ip_network((address + ('/24' if type(ip) is ipaddress.IPv4Address else '/64')).decode('ascii'), strict=False)
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net = str(net)
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net = ipaddress.ip_network((address + ('/24' if type(ip) is ipaddress.IPv4Address else '/64')).decode('ascii'), strict=False)
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net = str(net)
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if not net in bans or time.time() - bans[net]['last_attempt'] > RETRY_WINDOW:
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bans[net] = { 'attempts': 0 }
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active_window = RETRY_WINDOW
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else:
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active_window = time.time() - bans[net]['last_attempt']
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if not net in bans or time.time() - bans[net]['last_attempt'] > RETRY_WINDOW:
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bans[net] = { 'attempts': 0 }
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active_window = RETRY_WINDOW
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else:
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active_window = time.time() - bans[net]['last_attempt']
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bans[net]['attempts'] += 1
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bans[net]['last_attempt'] = time.time()
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bans[net]['attempts'] += 1
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bans[net]['last_attempt'] = time.time()
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active_window = time.time() - bans[net]['last_attempt']
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active_window = time.time() - bans[net]['last_attempt']
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if bans[net]['attempts'] >= MAX_ATTEMPTS:
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log['time'] = int(round(time.time()))
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log['priority'] = "crit"
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log['message'] = "Banning %s" % net
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Banning %s for %d minutes" % (net, BAN_TIME / 60)
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if type(ip) is ipaddress.IPv4Address:
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subprocess.call(["iptables", "-I", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["iptables", "-I", "FORWARD", "-s", net, "-j", "REJECT"])
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else:
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subprocess.call(["ip6tables", "-I", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["ip6tables", "-I", "FORWARD", "-s", net, "-j", "REJECT"])
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r.hset("F2B_ACTIVE_BANS", "%s" % net, log['time'] + BAN_TIME)
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else:
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log['time'] = int(round(time.time()))
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log['priority'] = "warn"
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log['message'] = "%d more attempts in the next %d seconds until %s is banned" % (MAX_ATTEMPTS - bans[net]['attempts'], RETRY_WINDOW, net)
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "%d more attempts in the next %d seconds until %s is banned" % (MAX_ATTEMPTS - bans[net]['attempts'], RETRY_WINDOW, net)
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if bans[net]['attempts'] >= MAX_ATTEMPTS:
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log['time'] = int(round(time.time()))
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log['priority'] = "crit"
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log['message'] = "Banning %s" % net
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Banning %s for %d minutes" % (net, BAN_TIME / 60)
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if type(ip) is ipaddress.IPv4Address:
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subprocess.call(["iptables", "-I", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["iptables", "-I", "FORWARD", "-s", net, "-j", "REJECT"])
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else:
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subprocess.call(["ip6tables", "-I", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["ip6tables", "-I", "FORWARD", "-s", net, "-j", "REJECT"])
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r.hset("F2B_ACTIVE_BANS", "%s" % net, log['time'] + BAN_TIME)
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else:
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log['time'] = int(round(time.time()))
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log['priority'] = "warn"
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log['message'] = "%d more attempts in the next %d seconds until %s is banned" % (MAX_ATTEMPTS - bans[net]['attempts'], RETRY_WINDOW, net)
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "%d more attempts in the next %d seconds until %s is banned" % (MAX_ATTEMPTS - bans[net]['attempts'], RETRY_WINDOW, net)
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def unban(net):
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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if not net in bans:
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log['message'] = "%s is not banned, skipping unban and deleting from queue (if any)" % net
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "%s is not banned, skipping unban and deleting from queue (if any)" % net
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r.hdel("F2B_QUEUE_UNBAN", "%s" % net)
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return
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log['message'] = "Unbanning %s" % net
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Unbanning %s" % net
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if type(ipaddress.ip_network(net.decode('ascii'))) is ipaddress.IPv4Network:
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subprocess.call(["iptables", "-D", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["iptables", "-D", "FORWARD", "-s", net, "-j", "REJECT"])
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else:
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subprocess.call(["ip6tables", "-D", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["ip6tables", "-D", "FORWARD", "-s", net, "-j", "REJECT"])
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r.hdel("F2B_ACTIVE_BANS", "%s" % net)
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r.hdel("F2B_QUEUE_UNBAN", "%s" % net)
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del bans[net]
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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if not net in bans:
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log['message'] = "%s is not banned, skipping unban and deleting from queue (if any)" % net
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "%s is not banned, skipping unban and deleting from queue (if any)" % net
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r.hdel("F2B_QUEUE_UNBAN", "%s" % net)
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return
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log['message'] = "Unbanning %s" % net
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Unbanning %s" % net
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if type(ipaddress.ip_network(net.decode('ascii'))) is ipaddress.IPv4Network:
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subprocess.call(["iptables", "-D", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["iptables", "-D", "FORWARD", "-s", net, "-j", "REJECT"])
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else:
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subprocess.call(["ip6tables", "-D", "INPUT", "-s", net, "-j", "REJECT"])
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subprocess.call(["ip6tables", "-D", "FORWARD", "-s", net, "-j", "REJECT"])
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r.hdel("F2B_ACTIVE_BANS", "%s" % net)
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r.hdel("F2B_QUEUE_UNBAN", "%s" % net)
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del bans[net]
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def quit(signum, frame):
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global quit_now
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quit_now = True
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global quit_now
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quit_now = True
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def clear():
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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log['message'] = "Clearing all bans"
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Clearing all bans"
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for net in bans.copy():
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unban(net)
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pubsub.unsubscribe()
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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log['message'] = "Clearing all bans"
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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print "Clearing all bans"
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for net in bans.copy():
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unban(net)
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pubsub.unsubscribe()
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def watch():
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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log['message'] = "Watching Redis channel F2B_CHANNEL"
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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pubsub.subscribe("F2B_CHANNEL")
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print "Subscribing to Redis channel F2B_CHANNEL"
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while True:
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for item in pubsub.listen():
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for rule_id, rule_regex in RULES.iteritems():
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if item['data'] and item['type'] == 'message':
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result = re.search(rule_regex, item['data'])
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if result:
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addr = result.group(1)
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log['time'] = int(round(time.time()))
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log['priority'] = "info"
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log['message'] = "Watching Redis channel F2B_CHANNEL"
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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pubsub.subscribe("F2B_CHANNEL")
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print "Subscribing to Redis channel F2B_CHANNEL"
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while True:
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for item in pubsub.listen():
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for rule_id, rule_regex in RULES.iteritems():
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if item['data'] and item['type'] == 'message':
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result = re.search(rule_regex, item['data'])
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if result:
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addr = result.group(1)
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ip = ipaddress.ip_address(addr.decode('ascii'))
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if ip.is_private or ip.is_loopback:
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continue
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print "%s matched rule id %d" % (addr, rule_id)
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log['time'] = int(round(time.time()))
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log['priority'] = "warn"
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log['message'] = "%s matched rule id %d" % (addr, rule_id)
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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ban(addr)
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print "%s matched rule id %d" % (addr, rule_id)
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log['time'] = int(round(time.time()))
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log['priority'] = "warn"
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log['message'] = "%s matched rule id %d" % (addr, rule_id)
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r.lpush("F2B_LOG", json.dumps(log, ensure_ascii=False))
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ban(addr)
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def autopurge():
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while not quit_now:
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BAN_TIME = int(r.get("F2B_BAN_TIME"))
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MAX_ATTEMPTS = int(r.get("F2B_MAX_ATTEMPTS"))
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QUEUE_UNBAN = r.hgetall("F2B_QUEUE_UNBAN")
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if QUEUE_UNBAN:
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for net in QUEUE_UNBAN:
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unban(str(net))
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for net in bans.copy():
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if bans[net]['attempts'] >= MAX_ATTEMPTS:
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if time.time() - bans[net]['last_attempt'] > BAN_TIME:
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unban(net)
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time.sleep(10)
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while not quit_now:
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BAN_TIME = int(r.get("F2B_BAN_TIME"))
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MAX_ATTEMPTS = int(r.get("F2B_MAX_ATTEMPTS"))
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QUEUE_UNBAN = r.hgetall("F2B_QUEUE_UNBAN")
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if QUEUE_UNBAN:
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for net in QUEUE_UNBAN:
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unban(str(net))
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for net in bans.copy():
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if bans[net]['attempts'] >= MAX_ATTEMPTS:
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if time.time() - bans[net]['last_attempt'] > BAN_TIME:
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unban(net)
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time.sleep(10)
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if __name__ == '__main__':
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watch_thread = Thread(target=watch)
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watch_thread.daemon = True
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watch_thread.start()
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watch_thread = Thread(target=watch)
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watch_thread.daemon = True
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watch_thread.start()
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autopurge_thread = Thread(target=autopurge)
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autopurge_thread.daemon = True
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autopurge_thread.start()
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autopurge_thread = Thread(target=autopurge)
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autopurge_thread.daemon = True
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autopurge_thread.start()
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signal.signal(signal.SIGTERM, quit)
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atexit.register(clear)
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signal.signal(signal.SIGTERM, quit)
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atexit.register(clear)
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while not quit_now:
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time.sleep(0.5)
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while not quit_now:
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time.sleep(0.5)
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@ -275,7 +275,7 @@ services:
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- acme
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fail2ban-mailcow:
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image: mailcow/fail2ban:1.8
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image: mailcow/fail2ban:1.9
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build: ./data/Dockerfiles/fail2ban
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stop_grace_period: 30s
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depends_on:
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