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fail2banBetter.py
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fail2banBetter.py
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#!/usr/bin/python
import re
import config
import os
import time
import sys
def whitelistCheck(ip):
whitelistFile = open('whitelist', 'r')
for whitelistLine in whitelistFile:
whitelistMatch = re.match(whitelistLine.rstrip(), ip)
if whitelistMatch:
whitelistFile.close()
return 1
whitelistFile.close()
return 0
def blacklistCheck(ip):
blacklistFile = open('blacklist', 'r')
for blacklistLine in blacklistFile:
blacklistMatch = re.match(blacklistLine.rstrip(), ip)
if blacklistMatch:
blacklistFile.close()
return 1
blacklistFile.close()
return 0
def writeToLog(action, ip, line="N/A", service="Null"):
clientLogFile = open('fail2banBetter.log', 'a')
if action is "ban":
clientLogFile.write("Banned[" + service + "][" + ip + "]: " + "\"" + line.rstrip() + "\"\n")
if action is "unban":
clientLogFile.write("Unbanned[" + service + "][" + ip + "]:\n")
if action is "whitelist":
clientLogFile.write("Whitelisted[" + service + "][" + ip + "]:\n")
if action is "logfileChange":
clientLogFile.write("Log file changed for[" + service + "]\n")
clientLogFile.close()
def banIp(ip, line=None, service="Null"):
blacklistFile = open('blacklist', 'a')
blacklistFile.write(ip + "\n")
blacklistFile.close()
os.system("iptables -A INPUT -s " + ip + " -j DROP")
writeToLog("ban", ip, line, service)
#unbanIp(ip, line, service)
def unbanIp(ip, line=None, service="Null"):
blacklistFile = open('blacklist', 'r')
blacklistLines = blacklistFile.readlines()
blacklistFile.close()
blacklistFile = open('blacklist', 'w')
for ipLine in blacklistLines:
if ipLine != ip + "\n":
blacklistFile.write(ipLine)
blacklistFile.close()
os.system("iptables -D INPUT -s " + ip + " -j DROP")
writeToLog("unban", ip, line, service)
def parseLog(regex, logFileLocation, service="Null"):
logFile = open(logFileLocation, 'r')
for line in logFile:
ipMatch = re.search(regex.rstrip(), line.rstrip())
if ipMatch:
ip = ipMatch.group(1)
if (whitelistCheck(ip) == 0 and blacklistCheck(ip) == 0):
banIp(ip, line, service)
logFile.close()
def findMatch(regexFileLocation, logFileLocation, service="Null"):
regexFile = open(regexFileLocation, 'r')
for regexLine in regexFile:
parseLog(regexLine.rstrip(), logFileLocation, service)
regexFile.close()
if sys.argv[1] == "reban":
blacklistFile = open('blacklist', 'r')
for ip in blacklistFile:
os.system("iptables -A INPUT -s " + ip.rstrip() + " -j DROP")
blacklistFile.close()
sys.exit("rebanned")
while (1 == 1):
if (os.path.getsize(config.ssh['log']) != config.ssh['lastLogSize']):
config.ssh['lastLogSize'] = os.path.getsize(config.ssh['log'])
writeToLog("logfileChange", None, None, "ssh")
findMatch(config.ssh['regex'], config.ssh['log'], "ssh")
if (os.path.getsize(config.apache['log']) != config.apache['lastLogSize']):
config.apache['lastLogSize'] = os.path.getsize(config.apache['log'])
writeToLog("logfileChange", None, None, "apache")
findMatch(config.apache['regex'], config.apache['log'], "apache")
if (os.path.getsize(config.vnc['log']) != config.vnc['lastLogSize']):
config.vnc['lastLogSize'] = os.path.getsize(config.vnc['log'])
writeToLog("logfileChange", None, None, "vnc")
findMatch(config.vnc['regex'], config.vnc['log'], "vnc")
time.sleep(10)