commit 7b41672d05f213240f2d8b6ea6d4c881de09cb21
Author: Mateusz Gruszczyński <gru@macbook.net.r.local>
Date:   Tue Oct 28 21:27:10 2025 +0100

    upload

diff --git a/backends/base.py b/backends/base.py
new file mode 100644
index 0000000..7bdcbff
--- /dev/null
+++ b/backends/base.py
@@ -0,0 +1,63 @@
+"""
+Bazowa klasa dla backendów firewall
+"""
+
+import logging
+
+
+class FirewallBackend:
+    """Bazowa klasa dla backendów firewall"""
+    
+    def __init__(self, config):
+        """
+        Args:
+            config: ConfigParser object z konfiguracją
+        """
+        self.config = config
+        self.logger = logging.getLogger(self.__class__.__name__)
+        
+    def ban_ip(self, ip, duration):
+        """
+        Banuje IP na określony czas
+        
+        Args:
+            ip: Adres IP do zbanowania
+            duration: Czas bana w sekundach
+            
+        Returns:
+            bool: True jeśli ban się powiódł
+        """
+        raise NotImplementedError("Subclasses must implement ban_ip()")
+        
+    def unban_ip(self, ip):
+        """
+        Usuwa ban dla IP
+        
+        Args:
+            ip: Adres IP do odbanowania
+            
+        Returns:
+            bool: True jeśli odbanowanie się powiodło
+        """
+        raise NotImplementedError("Subclasses must implement unban_ip()")
+        
+    def is_banned(self, ip):
+        """
+        Sprawdza czy IP jest zbanowany
+        
+        Args:
+            ip: Adres IP do sprawdzenia
+            
+        Returns:
+            bool: True jeśli IP jest zbanowany
+        """
+        raise NotImplementedError("Subclasses must implement is_banned()")
+        
+    def test_availability(self):
+        """
+        Sprawdza czy backend jest dostępny w systemie
+        
+        Returns:
+            bool: True jeśli backend jest dostępny
+        """
+        return True
diff --git a/backends/csf.py b/backends/csf.py
new file mode 100644
index 0000000..f97cd00
--- /dev/null
+++ b/backends/csf.py
@@ -0,0 +1,102 @@
+"""
+Backend dla ConfigServer Security & Firewall (CSF)
+"""
+
+import subprocess
+from pathlib import Path
+from .base import FirewallBackend
+
+
+class CSFBackend(FirewallBackend):
+    """Backend dla ConfigServer Firewall"""
+    
+    def __init__(self, config):
+        super().__init__(config)
+        self.csf_path = config.get('backend_csf', 'csf_path', 
+                                   fallback='/usr/sbin/csf')
+        
+        if not self.test_availability():
+            self.logger.warning(f"CSF not found at {self.csf_path}")
+            
+    def test_availability(self):
+        """Sprawdza czy CSF jest zainstalowany"""
+        return Path(self.csf_path).exists()
+        
+    def ban_ip(self, ip, duration):
+        """
+        Banuje IP używając CSF
+        
+        CSF używa:
+        - csf -d IP "comment" - permanent deny
+        - csf -td IP duration "comment" - temporary deny
+        """
+        try:
+            # Temporary deny na określony czas (w sekundach)
+            cmd = [
+                self.csf_path, '-td', ip, 
+                str(duration), 
+                f"LogMon auto-ban"
+            ]
+            
+            result = subprocess.run(
+                cmd, 
+                capture_output=True, 
+                text=True,
+                timeout=10
+            )
+            
+            if result.returncode == 0:
+                self.logger.debug(f"CSF ban successful: {result.stdout.strip()}")
+                return True
+            else:
+                self.logger.error(f"CSF ban failed: {result.stderr.strip()}")
+                return False
+                
+        except subprocess.TimeoutExpired:
+            self.logger.error(f"CSF ban command timed out for {ip}")
+            return False
+        except Exception as e:
+            self.logger.error(f"Error banning IP with CSF: {e}")
+            return False
+            
+    def unban_ip(self, ip):
+        """Usuwa ban używając CSF"""
+        try:
+            # Remove temporary ban
+            cmd = [self.csf_path, '-tr', ip]
+            result = subprocess.run(
+                cmd, 
+                capture_output=True, 
+                text=True,
+                timeout=10
+            )
+            
+            if result.returncode == 0:
+                self.logger.debug(f"CSF unban successful for {ip}")
+                return True
+            else:
+                self.logger.warning(f"CSF unban may have failed: {result.stderr.strip()}")
+                # CSF czasem zwraca error nawet gdy się udało
+                return True
+                
+        except Exception as e:
+            self.logger.error(f"Error unbanning IP with CSF: {e}")
+            return False
+            
+    def is_banned(self, ip):
+        """Sprawdza czy IP jest zbanowany w CSF"""
+        try:
+            cmd = [self.csf_path, '-g', ip]
+            result = subprocess.run(
+                cmd, 
+                capture_output=True, 
+                text=True,
+                timeout=10
+            )
+            
+            output = result.stdout.lower()
+            return "deny" in output or "drop" in output
+            
+        except Exception as e:
+            self.logger.error(f"Error checking ban status: {e}")
+            return False
diff --git a/backends/init.py b/backends/init.py
new file mode 100644
index 0000000..2bd3135
--- /dev/null
+++ b/backends/init.py
@@ -0,0 +1,17 @@
+"""
+LogMon Backends - Integracje z różnymi firewallami
+"""
+
+from .base import FirewallBackend
+from .csf import CSFBackend
+from .nftables import NFTablesBackend
+from .iptables import IPTablesBackend
+from .ufw import UFWBackend
+
+__all__ = [
+    'FirewallBackend',
+    'CSFBackend',
+    'NFTablesBackend',
+    'IPTablesBackend',
+    'UFWBackend'
+]
diff --git a/backends/iptables.py b/backends/iptables.py
new file mode 100644
index 0000000..c1f2676
--- /dev/null
+++ b/backends/iptables.py
@@ -0,0 +1,104 @@
+"""
+Backend dla iptables
+"""
+
+import subprocess
+from .base import FirewallBackend
+
+
+class IPTablesBackend(FirewallBackend):
+    """Backend dla iptables"""
+    
+    def __init__(self, config):
+        super().__init__(config)
+        self.chain = config.get('backend_iptables', 'chain_name', 
+                               fallback='LOGMON_BLOCK')
+        
+        if self.test_availability():
+            self.setup_chain()
+        else:
+            self.logger.warning("iptables not available")
+            
+    def test_availability(self):
+        """Sprawdza czy iptables jest dostępny"""
+        try:
+            result = subprocess.run(
+                ['iptables', '--version'], 
+                capture_output=True,
+                timeout=5
+            )
+            return result.returncode == 0
+        except:
+            return False
+            
+    def setup_chain(self):
+        """Tworzy chain jeśli nie istnieje"""
+        try:
+            # Sprawdź czy chain istnieje
+            cmd = ['iptables', '-L', self.chain, '-n']
+            result = subprocess.run(cmd, capture_output=True, timeout=5)
+            
+            if result.returncode != 0:
+                # Utwórz chain
+                subprocess.run(['iptables', '-N', self.chain], check=True, timeout=5)
+                
+                # Dodaj do INPUT na początku
+                subprocess.run(
+                    ['iptables', '-I', 'INPUT', '1', '-j', self.chain], 
+                    check=True, 
+                    timeout=5
+                )
+                
+                self.logger.info(f"Created iptables chain: {self.chain}")
+                
+        except Exception as e:
+            self.logger.error(f"Error setting up iptables chain: {e}")
+            
+    def ban_ip(self, ip, duration):
+        """Banuje IP używając iptables"""
+        try:
+            cmd = [
+                'iptables', '-I', self.chain, '1',
+                '-s', ip, '-j', 'DROP',
+                '-m', 'comment', '--comment', f'LogMon ban {duration}s'
+            ]
+            
+            result = subprocess.run(cmd, capture_output=True, timeout=5)
+            
+            if result.returncode == 0:
+                self.logger.debug(f"iptables ban successful for {ip}")
+                return True
+            else:
+                self.logger.error(f"iptables ban failed: {result.stderr.decode()}")
+                return False
+                
+        except Exception as e:
+            self.logger.error(f"Error banning IP with iptables: {e}")
+            return False
+            
+    def unban_ip(self, ip):
+        """Usuwa ban używając iptables"""
+        try:
+            cmd = ['iptables', '-D', self.chain, '-s', ip, '-j', 'DROP']
+            result = subprocess.run(cmd, capture_output=True, timeout=5)
+            
+            if result.returncode == 0:
+                self.logger.debug(f"iptables unban successful for {ip}")
+                return True
+            else:
+                self.logger.warning(f"iptables unban may have failed")
+                return False
+                
+        except Exception as e:
+            self.logger.error(f"Error unbanning IP with iptables: {e}")
+            return False
+            
+    def is_banned(self, ip):
+        """Sprawdza czy IP jest zbanowany"""
+        try:
+            cmd = ['iptables', '-L', self.chain, '-n', '--line-numbers']
+            result = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
+            return ip in result.stdout
+        except Exception as e:
+            self.logger.error(f"Error checking ban status: {e}")
+            return False
diff --git a/backends/nftables.py b/backends/nftables.py
new file mode 100644
index 0000000..96f9fb5
--- /dev/null
+++ b/backends/nftables.py
@@ -0,0 +1,120 @@
+"""
+Backend dla nftables
+"""
+
+import subprocess
+from .base import FirewallBackend
+
+
+class NFTablesBackend(FirewallBackend):
+    """Backend dla nftables"""
+    
+    def __init__(self, config):
+        super().__init__(config)
+        self.table = config.get('backend_nftables', 'table_name', 
+                               fallback='filter')
+        self.chain = config.get('backend_nftables', 'chain_name', 
+                               fallback='logmon_block')
+        
+        if self.test_availability():
+            self.setup_chain()
+        else:
+            self.logger.warning("nftables not available")
+            
+    def test_availability(self):
+        """Sprawdza czy nftables jest dostępny"""
+        try:
+            result = subprocess.run(
+                ['nft', '--version'], 
+                capture_output=True,
+                timeout=5
+            )
+            return result.returncode == 0
+        except:
+            return False
+            
+    def setup_chain(self):
+        """Tworzy chain jeśli nie istnieje"""
+        try:
+            # Sprawdź czy chain istnieje
+            cmd = ['nft', 'list', 'chain', 'inet', self.table, self.chain]
+            result = subprocess.run(cmd, capture_output=True, timeout=5)
+            
+            if result.returncode != 0:
+                # Utwórz chain z priorytetem input
+                cmd = [
+                    'nft', 'add', 'chain', 'inet', self.table, self.chain,
+                    '{', 'type', 'filter', 'hook', 'input', 'priority', '0', ';', '}'
+                ]
+                subprocess.run(cmd, check=True, timeout=5)
+                self.logger.info(f"Created nftables chain: {self.chain}")
+                
+        except Exception as e:
+            self.logger.error(f"Error setting up nftables chain: {e}")
+            
+    def ban_ip(self, ip, duration):
+        """Banuje IP używając nftables"""
+        try:
+            # Dodaj regułę DROP
+            cmd = [
+                'nft', 'add', 'rule', 'inet', self.table, self.chain,
+                'ip', 'saddr', ip, 'counter', 'drop',
+                'comment', f'"LogMon ban {duration}s"'
+            ]
+            
+            result = subprocess.run(cmd, capture_output=True, timeout=5)
+            
+            if result.returncode == 0:
+                self.logger.debug(f"nftables ban successful for {ip}")
+                return True
+            else:
+                self.logger.error(f"nftables ban failed: {result.stderr.decode()}")
+                return False
+                
+        except Exception as e:
+            self.logger.error(f"Error banning IP with nftables: {e}")
+            return False
+            
+    def unban_ip(self, ip):
+        """Usuwa ban używając nftables"""
+        try:
+            # Znajdź handle reguły
+            cmd = ['nft', '-a', 'list', 'chain', 'inet', self.table, self.chain]
+            result = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
+            
+            if result.returncode != 0:
+                return False
+                
+            # Parsuj output i znajdź handle
+            for line in result.stdout.split('\n'):
+                if ip in line and '# handle' in line:
+                    try:
+                        handle = line.split('# handle')[1].strip()
+                        
+                        # Usuń regułę
+                        cmd = [
+                            'nft', 'delete', 'rule', 'inet', 
+                            self.table, self.chain, 'handle', handle
+                        ]
+                        subprocess.run(cmd, check=True, timeout=5)
+                        self.logger.debug(f"nftables unban successful for {ip}")
+                        return True
+                        
+                    except Exception as e:
+                        self.logger.error(f"Error parsing handle: {e}")
+                        
+            return False
+            
+        except Exception as e:
+            self.logger.error(f"Error unbanning IP with nftables: {e}")
+            return False
+            
+    def is_banned(self, ip):
+        """Sprawdza czy IP jest zbanowany"""
+        try:
+            cmd = ['nft', 'list', 'chain', 'inet', self.table, self.chain]
+            result = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
+            return ip in result.stdout
+        except Exception as e:
+            self.logger.error(f"Error checking ban status: {e}")
+            return False
diff --git a/backends/ufw.py b/backends/ufw.py
new file mode 100644
index 0000000..9536cec
--- /dev/null
+++ b/backends/ufw.py
@@ -0,0 +1,78 @@
+"""
+Backend dla UFW (Uncomplicated Firewall)
+"""
+
+import subprocess
+from .base import FirewallBackend
+
+
+class UFWBackend(FirewallBackend):
+    """Backend dla UFW"""
+    
+    def test_availability(self):
+        """Sprawdza czy UFW jest dostępny"""
+        try:
+            result = subprocess.run(
+                ['ufw', 'version'], 
+                capture_output=True,
+                timeout=5
+            )
+            return result.returncode == 0
+        except:
+            return False
+            
+    def ban_ip(self, ip, duration):
+        """Banuje IP używając UFW"""
+        try:
+            # UFW nie wspiera natywnie timeout, więc używamy prostego deny
+            cmd = ['ufw', 'deny', 'from', ip]
+            
+            result = subprocess.run(cmd, capture_output=True, timeout=5)
+            
+            if result.returncode == 0:
+                self.logger.debug(f"UFW ban successful for {ip}")
+                # UFW wymaga reload
+                subprocess.run(['ufw', 'reload'], capture_output=True, timeout=5)
+                return True
+            else:
+                self.logger.error(f"UFW ban failed: {result.stderr.decode()}")
+                return False
+                
+        except Exception as e:
+            self.logger.error(f"Error banning IP with UFW: {e}")
+            return False
+            
+    def unban_ip(self, ip):
+        """Usuwa ban używając UFW"""
+        try:
+            cmd = ['ufw', 'delete', 'deny', 'from', ip]
+            result = subprocess.run(cmd, capture_output=True, timeout=5)
+            
+            if result.returncode == 0:
+                self.logger.debug(f"UFW unban successful for {ip}")
+                subprocess.run(['ufw', 'reload'], capture_output=True, timeout=5)
+                return True
+            else:
+                self.logger.warning(f"UFW unban may have failed")
+                return False
+                
+        except Exception as e:
+            self.logger.error(f"Error unbanning IP with UFW: {e}")
+            return False
+            
+    def is_banned(self, ip):
+        """Sprawdza czy IP jest zbanowany"""
+        try:
+            cmd = ['ufw', 'status', 'numbered']
+            result = subprocess.run(cmd, capture_output=True, text=True, timeout=5)
+            
+            # Szukaj IP z DENY
+            for line in result.stdout.split('\n'):
+                if ip in line and 'DENY' in line:
+                    return True
+                    
+            return False
+            
+        except Exception as e:
+            self.logger.error(f"Error checking ban status: {e}")
+            return False
diff --git a/config.ini b/config.ini
new file mode 100644
index 0000000..aef3d57
--- /dev/null
+++ b/config.ini
@@ -0,0 +1,42 @@
+[general]
+debug = false
+log_file = /var/log/logmon.log
+pid_file = /var/run/logmon.pid
+backend = csf
+
+[backend_csf]
+csf_path = /usr/sbin/csf
+# Dodatkowe opcje CSF
+
+[backend_nftables]
+table_name = filter
+chain_name = logmon_block
+
+[backend_iptables]
+chain_name = LOGMON_BLOCK
+
+[backend_ufw]
+# UFW nie wymaga dodatkowych parametrów
+
+[module_postfix]
+enabled = true
+log_file = /var/log/mail.log
+# Alternatywnie dla systemd:
+# use_journald = true
+# journald_unit = postfix.service
+
+# Parametry detekcji
+max_failures = 5
+time_window = 60
+ban_duration = 86400
+
+# Wzorce do wykrywania
+patterns = auth_failed,sasl_failed
+
+[pattern_auth_failed]
+regex = authentication failed
+score = 1
+
+[pattern_sasl_failed]
+regex = SASL [A-Z\-\d]+ authentication failed
+score = 2
diff --git a/logmon.py b/logmon.py
new file mode 100644
index 0000000..4775add
--- /dev/null
+++ b/logmon.py
@@ -0,0 +1,477 @@
+#!/usr/bin/env python3
+"""
+LogMon - Modularny demon do monitorowania logów i blokowania IP
+Autor: System Administrator
+Wersja: 1.0
+"""
+
+import sys
+import os
+import time
+import signal
+import logging
+import argparse
+import configparser
+from collections import defaultdict, deque
+from datetime import datetime, timedelta
+from pathlib import Path
+
+# Importy z lokalnych modułów
+from modules import PostfixModule
+from backends import CSFBackend, NFTablesBackend, IPTablesBackend, UFWBackend
+
+
+class LogMonDaemon:
+    """Główny demon LogMon"""
+    
+    def __init__(self, config_file):
+        """
+        Inicjalizacja demona
+        
+        Args:
+            config_file: Ścieżka do pliku konfiguracyjnego INI
+        """
+        self.config = configparser.ConfigParser()
+        self.config.read(config_file)
+        
+        self.running = False
+        self.ip_tracker = defaultdict(lambda: deque())
+        self.banned_ips = {}
+        
+        # Konfiguracja logowania
+        self.setup_logging()
+        
+        # Wybór backendu firewall
+        self.backend = self.load_backend()
+        
+        # Ładowanie modułów monitorowania
+        self.modules = self.load_modules()
+        
+        # Obsługa sygnałów systemowych
+        signal.signal(signal.SIGTERM, self.signal_handler)
+        signal.signal(signal.SIGINT, self.signal_handler)
+        signal.signal(signal.SIGHUP, self.signal_reload)
+        
+        self.logger.info("LogMon daemon initialized")
+        
+    def setup_logging(self):
+        """Konfiguracja systemu logowania"""
+        debug = self.config.getboolean('general', 'debug', fallback=False)
+        log_file = self.config.get('general', 'log_file', 
+                                   fallback='/var/log/logmon.log')
+        
+        level = logging.DEBUG if debug else logging.INFO
+        
+        # Usuń istniejące handlery
+        logging.basicConfig(
+            level=level,
+            format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
+            handlers=[
+                logging.FileHandler(log_file),
+                logging.StreamHandler(sys.stdout)
+            ]
+        )
+        
+        self.logger = logging.getLogger('LogMon')
+        self.logger.info(f"Logging initialized (debug={debug})")
+        
+    def load_backend(self):
+        """Ładuje odpowiedni backend firewall"""
+        backend_name = self.config.get('general', 'backend', fallback='csf')
+        
+        self.logger.info(f"Loading backend: {backend_name}")
+        
+        backend_map = {
+            'csf': CSFBackend,
+            'nftables': NFTablesBackend,
+            'iptables': IPTablesBackend,
+            'ufw': UFWBackend
+        }
+        
+        if backend_name not in backend_map:
+            raise ValueError(f"Unknown backend: {backend_name}")
+            
+        backend_class = backend_map[backend_name]
+        backend = backend_class(self.config)
+        
+        # Sprawdź dostępność
+        if not backend.test_availability():
+            self.logger.warning(f"Backend {backend_name} may not be available!")
+            
+        return backend
+        
+    def load_modules(self):
+        """Ładuje moduły monitorowania"""
+        modules = []
+        
+        # Postfix module
+        if self.config.getboolean('module_postfix', 'enabled', fallback=False):
+            try:
+                module = PostfixModule(self.config, self)
+                modules.append(module)
+                self.logger.info("Loaded Postfix module")
+            except Exception as e:
+                self.logger.error(f"Error loading Postfix module: {e}")
+                
+        # Tutaj można dodać więcej modułów w przyszłości
+        # if self.config.getboolean('module_ssh', 'enabled', fallback=False):
+        #     modules.append(SSHModule(self.config, self))
+        
+        if not modules:
+            self.logger.warning("No modules loaded!")
+            
+        return modules
+        
+    def signal_handler(self, signum, frame):
+        """Obsługa sygnałów SIGTERM i SIGINT"""
+        self.logger.info(f"Received signal {signum}, shutting down gracefully...")
+        self.running = False
+        
+    def signal_reload(self, signum, frame):
+        """Obsługa sygnału SIGHUP - reload konfiguracji"""
+        self.logger.info("Received SIGHUP, reloading configuration...")
+        # TODO: Implementacja reload konfiguracji
+        
+    def track_failure(self, ip, score=1):
+        """
+        Śledzi nieudane próby logowania dla danego IP
+        
+        Args:
+            ip: Adres IP atakującego
+            score: Punkty za dane niepowodzenie (domyślnie 1)
+        """
+        now = datetime.now()
+        
+        # Dodaj wpis do trackera
+        self.ip_tracker[ip].append((now, score))
+        
+        # Usuń stare wpisy spoza okna czasowego
+        time_window = self.config.getint('module_postfix', 'time_window', 
+                                         fallback=60)
+        cutoff = now - timedelta(seconds=time_window)
+        
+        while self.ip_tracker[ip] and self.ip_tracker[ip][0][0] < cutoff:
+            self.ip_tracker[ip].popleft()
+            
+        # Oblicz całkowity wynik
+        total_score = sum(score for _, score in self.ip_tracker[ip])
+        failures_count = len(self.ip_tracker[ip])
+        
+        max_failures = self.config.getint('module_postfix', 'max_failures', 
+                                         fallback=5)
+        
+        self.logger.debug(
+            f"IP {ip}: {failures_count} failures, score {total_score}/{max_failures}"
+        )
+        
+        # Sprawdź czy przekroczono limit
+        if total_score >= max_failures and ip not in self.banned_ips:
+            self.ban_ip(ip)
+        elif total_score >= max_failures and ip in self.banned_ips:
+            self.logger.debug(f"IP {ip} already banned, ignoring")
+            
+    def ban_ip(self, ip):
+        """
+        Banuje adres IP
+        
+        Args:
+            ip: Adres IP do zbanowania
+        """
+        ban_duration = self.config.getint('module_postfix', 'ban_duration', 
+                                         fallback=86400)
+        
+        self.logger.warning(
+            f"Banning IP {ip} for {ban_duration} seconds "
+            f"({ban_duration/3600:.1f} hours)"
+        )
+        
+        if self.backend.ban_ip(ip, ban_duration):
+            expiry_time = datetime.now() + timedelta(seconds=ban_duration)
+            self.banned_ips[ip] = expiry_time
+            
+            self.logger.info(
+                f"Successfully banned {ip} until {expiry_time.strftime('%Y-%m-%d %H:%M:%S')}"
+            )
+            
+            # Wyczyść tracker dla tego IP
+            if ip in self.ip_tracker:
+                del self.ip_tracker[ip]
+        else:
+            self.logger.error(f"Failed to ban {ip}")
+            
+    def unban_ip(self, ip):
+        """
+        Odbania adres IP
+        
+        Args:
+            ip: Adres IP do odbanowania
+        """
+        self.logger.info(f"Unbanning expired IP {ip}")
+        
+        if self.backend.unban_ip(ip):
+            if ip in self.banned_ips:
+                del self.banned_ips[ip]
+            self.logger.info(f"Successfully unbanned {ip}")
+        else:
+            self.logger.error(f"Failed to unban {ip}")
+            
+    def unban_expired(self):
+        """Usuwa bany, które wygasły"""
+        now = datetime.now()
+        expired = [ip for ip, expiry in self.banned_ips.items() 
+                   if now >= expiry]
+        
+        for ip in expired:
+            self.unban_ip(ip)
+            
+    def save_state(self):
+        """Zapisuje stan banów do pliku (opcjonalnie)"""
+        # TODO: Implementacja persystencji stanu
+        pass
+        
+    def load_state(self):
+        """Ładuje stan banów z pliku (opcjonalnie)"""
+        # TODO: Implementacja persystencji stanu
+        pass
+        
+    def daemonize(self):
+        """Przechodzi w tryb demona (fork)"""
+        pid_file = self.config.get('general', 'pid_file', 
+                                   fallback='/var/run/logmon.pid')
+        
+        # Sprawdź czy już działa
+        if os.path.exists(pid_file):
+            with open(pid_file, 'r') as f:
+                old_pid = int(f.read().strip())
+                
+            # Sprawdź czy proces istnieje
+            try:
+                os.kill(old_pid, 0)
+                self.logger.error(f"Daemon already running with PID {old_pid}")
+                sys.exit(1)
+            except OSError:
+                # Proces nie istnieje, usuń stary PID file
+                os.remove(pid_file)
+        
+        # Pierwszy fork
+        try:
+            pid = os.fork()
+            if pid > 0:
+                # Parent process
+                sys.exit(0)
+        except OSError as e:
+            self.logger.error(f"Fork #1 failed: {e}")
+            sys.exit(1)
+            
+        # Odłącz od terminala
+        os.chdir('/')
+        os.setsid()
+        os.umask(0)
+        
+        # Drugi fork
+        try:
+            pid = os.fork()
+            if pid > 0:
+                # Parent process
+                sys.exit(0)
+        except OSError as e:
+            self.logger.error(f"Fork #2 failed: {e}")
+            sys.exit(1)
+            
+        # Zapisz PID
+        pid = os.getpid()
+        with open(pid_file, 'w') as f:
+            f.write(str(pid))
+            
+        self.logger.info(f"Daemon started with PID {pid}")
+        
+        # Przekieruj standardowe wyjścia
+        sys.stdout.flush()
+        sys.stderr.flush()
+        
+        devnull = open(os.devnull, 'r+')
+        os.dup2(devnull.fileno(), sys.stdin.fileno())
+        
+        # Stdout i stderr zostawiamy dla logowania
+        
+    def cleanup(self):
+        """Sprzątanie przed zakończeniem"""
+        pid_file = self.config.get('general', 'pid_file', 
+                                   fallback='/var/run/logmon.pid')
+        
+        # Usuń PID file
+        if os.path.exists(pid_file):
+            try:
+                os.remove(pid_file)
+            except Exception as e:
+                self.logger.error(f"Error removing PID file: {e}")
+                
+    def print_status(self):
+        """Wyświetla status demona"""
+        print("\n=== LogMon Status ===")
+        print(f"Backend: {self.backend.__class__.__name__}")
+        print(f"Modules: {len(self.modules)}")
+        print(f"Currently banned IPs: {len(self.banned_ips)}")
+        print(f"Tracked IPs: {len(self.ip_tracker)}")
+        
+        if self.banned_ips:
+            print("\nBanned IPs:")
+            for ip, expiry in sorted(self.banned_ips.items(), 
+                                    key=lambda x: x[1]):
+                remaining = (expiry - datetime.now()).total_seconds()
+                if remaining > 0:
+                    print(f"  {ip:15s} - expires in {remaining/60:.1f} minutes")
+                else:
+                    print(f"  {ip:15s} - EXPIRED")
+                    
+        print("\n")
+        
+    def run(self, daemonize=True):
+        """
+        Główna pętla demona
+        
+        Args:
+            daemonize: Czy przejść w tryb demona (fork)
+        """
+        if daemonize:
+            self.daemonize()
+            
+        self.running = True
+        self.logger.info("LogMon daemon started")
+        
+        # Uruchom moduły
+        for module in self.modules:
+            try:
+                module.start()
+            except Exception as e:
+                self.logger.error(f"Error starting module: {e}")
+                
+        # Główna pętla
+        try:
+            while self.running:
+                try:
+                    # Sprawdź wygasłe bany co 10 sekund
+                    self.unban_expired()
+                    
+                    # Wyświetl status co minutę (tylko w debug mode)
+                    if self.config.getboolean('general', 'debug', fallback=False):
+                        if int(time.time()) % 60 == 0:
+                            self.logger.debug(
+                                f"Status: {len(self.banned_ips)} banned, "
+                                f"{len(self.ip_tracker)} tracked"
+                            )
+                    
+                    # Krótkie oczekiwanie
+                    time.sleep(10)
+                    
+                except KeyboardInterrupt:
+                    self.logger.info("Keyboard interrupt received")
+                    break
+                except Exception as e:
+                    self.logger.error(f"Error in main loop: {e}", exc_info=True)
+                    time.sleep(1)
+                    
+        finally:
+            # Zatrzymaj moduły
+            self.logger.info("Stopping modules...")
+            for module in self.modules:
+                try:
+                    module.stop()
+                except Exception as e:
+                    self.logger.error(f"Error stopping module: {e}")
+                    
+            # Sprzątanie
+            self.cleanup()
+            
+            self.logger.info("LogMon daemon stopped")
+
+
+def main():
+    """Główna funkcja programu"""
+    parser = argparse.ArgumentParser(
+        description='LogMon - Log Monitoring and IP Blocking Daemon',
+        formatter_class=argparse.RawDescriptionHelpFormatter,
+        epilog="""
+Przykłady użycia:
+  %(prog)s -c /etc/logmon/config.ini          # Uruchom jako demon
+  %(prog)s -c /etc/logmon/config.ini -f       # Uruchom w foreground
+  %(prog)s -c /etc/logmon/config.ini -f -d    # Uruchom w foreground z debugiem
+  
+Sygnały:
+  SIGTERM, SIGINT - graceful shutdown
+  SIGHUP          - reload konfiguracji (TODO)
+        """
+    )
+    
+    parser.add_argument(
+        '-c', '--config',
+        default='/etc/logmon/config.ini',
+        help='Ścieżka do pliku konfiguracyjnego (domyślnie: /etc/logmon/config.ini)'
+    )
+    
+    parser.add_argument(
+        '-f', '--foreground',
+        action='store_true',
+        help='Uruchom w foreground (nie demonizuj)'
+    )
+    
+    parser.add_argument(
+        '-d', '--debug',
+        action='store_true',
+        help='Włącz tryb debug (nadpisuje ustawienie z config.ini)'
+    )
+    
+    parser.add_argument(
+        '-t', '--test',
+        action='store_true',
+        help='Test konfiguracji i wyjście'
+    )
+    
+    parser.add_argument(
+        '--version',
+        action='version',
+        version='LogMon 1.0'
+    )
+    
+    args = parser.parse_args()
+    
+    # Sprawdź czy plik konfiguracyjny istnieje
+    if not os.path.exists(args.config):
+        print(f"Error: Configuration file not found: {args.config}", file=sys.stderr)
+        sys.exit(1)
+        
+    # Sprawdź uprawnienia root
+    if os.geteuid() != 0 and not args.test:
+        print("Error: This program must be run as root", file=sys.stderr)
+        sys.exit(1)
+        
+    try:
+        # Inicjalizacja demona
+        daemon = LogMonDaemon(args.config)
+        
+        # Nadpisz debug jeśli podano w argumentach
+        if args.debug:
+            daemon.config.set('general', 'debug', 'true')
+            daemon.setup_logging()
+            
+        # Tryb testowy
+        if args.test:
+            print("Configuration test successful")
+            daemon.print_status()
+            sys.exit(0)
+            
+        # Uruchom demona
+        daemon.run(daemonize=not args.foreground)
+        
+    except KeyboardInterrupt:
+        print("\nInterrupted by user")
+        sys.exit(0)
+    except Exception as e:
+        print(f"Fatal error: {e}", file=sys.stderr)
+        import traceback
+        traceback.print_exc()
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/logmon.service b/logmon.service
new file mode 100644
index 0000000..4322757
--- /dev/null
+++ b/logmon.service
@@ -0,0 +1,23 @@
+[Unit]
+Description=LogMon - Log Monitoring and IP Blocking Daemon
+After=network.target syslog.target
+
+[Service]
+Type=forking
+User=root
+Group=root
+WorkingDirectory=/opt/logmon
+ExecStart=/usr/bin/python3 /opt/logmon/logmon.py -c /etc/logmon/config.ini
+ExecReload=/bin/kill -HUP $MAINPID
+PIDFile=/var/run/logmon.pid
+Restart=on-failure
+RestartSec=10s
+
+# Security hardening
+PrivateTmp=yes
+NoNewPrivileges=false
+ProtectSystem=strict
+ReadWritePaths=/var/log /var/run /etc/csf
+
+[Install]
+WantedBy=multi-user.target
diff --git a/modules/base.py b/modules/base.py
new file mode 100644
index 0000000..d0faff6
--- /dev/null
+++ b/modules/base.py
@@ -0,0 +1,54 @@
+"""
+Bazowa klasa dla modułów monitorowania logów
+"""
+
+import logging
+import time
+import threading
+
+
+class LogModule:
+    """Bazowa klasa dla modułów monitorowania"""
+    
+    def __init__(self, config, daemon):
+        """
+        Args:
+            config: ConfigParser object z konfiguracją
+            daemon: Referencja do głównego demona
+        """
+        self.config = config
+        self.daemon = daemon
+        self.logger = logging.getLogger(self.__class__.__name__)
+        self.running = False
+        self.thread = None
+        
+    def start(self):
+        """Uruchamia moduł w osobnym wątku"""
+        if self.running:
+            self.logger.warning("Module already running")
+            return
+            
+        self.running = True
+        self.thread = threading.Thread(target=self._run, daemon=True)
+        self.thread.start()
+        self.logger.info(f"{self.__class__.__name__} started")
+        
+    def stop(self):
+        """Zatrzymuje moduł"""
+        self.running = False
+        if self.thread and self.thread.is_alive():
+            self.thread.join(timeout=5)
+        self.logger.info(f"{self.__class__.__name__} stopped")
+        
+    def _run(self):
+        """Główna pętla modułu - do nadpisania w klasach potomnych"""
+        raise NotImplementedError("Subclasses must implement _run()")
+        
+    def process_line(self, line):
+        """
+        Przetwarza pojedynczą linię logu
+        
+        Args:
+            line: Linia tekstu z logu
+        """
+        raise NotImplementedError("Subclasses must implement process_line()")
diff --git a/modules/init.py b/modules/init.py
new file mode 100644
index 0000000..14b94ec
--- /dev/null
+++ b/modules/init.py
@@ -0,0 +1,8 @@
+"""
+LogMon Modules - Moduły monitorowania różnych aplikacji
+"""
+
+from .base import LogModule
+from .postfix import PostfixModule
+
+__all__ = ['LogModule', 'PostfixModule']
diff --git a/modules/postfix.py b/modules/postfix.py
new file mode 100644
index 0000000..ed7d465
--- /dev/null
+++ b/modules/postfix.py
@@ -0,0 +1,120 @@
+"""
+Moduł monitorujący Postfix SMTP server
+"""
+
+import re
+import time
+from .base import LogModule
+
+
+class PostfixModule(LogModule):
+    """Moduł monitorujący Postfix"""
+    
+    def __init__(self, config, daemon):
+        super().__init__(config, daemon)
+        
+        # Kompiluj wzorce regex dla wydajności
+        self.patterns = self._load_patterns()
+        
+        # Regex do wyciągania IP z logów Postfix
+        # Obsługuje zarówno unknown[IP] jak i hostname[IP]
+        self.ip_pattern = re.compile(
+            r'(?:unknown|[\w\-\.]+)\[(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\]'
+        )
+        
+        # Ścieżka do pliku logu
+        self.log_file = config.get('module_postfix', 'log_file', 
+                                   fallback='/var/log/mail.log')
+        
+        self.logger.info(f"Loaded {len(self.patterns)} patterns for Postfix")
+        
+    def _load_patterns(self):
+        """Ładuje wzorce z konfiguracji"""
+        patterns = []
+        pattern_names = self.config.get('module_postfix', 'patterns', 
+                                       fallback='').split(',')
+        
+        for name in pattern_names:
+            name = name.strip()
+            if not name:
+                continue
+                
+            section = f'pattern_{name}'
+            if section not in self.config:
+                self.logger.warning(f"Pattern section '{section}' not found in config")
+                continue
+                
+            try:
+                regex = self.config.get(section, 'regex')
+                score = self.config.getint(section, 'score', fallback=1)
+                
+                patterns.append({
+                    'name': name,
+                    'regex': re.compile(regex, re.IGNORECASE),
+                    'score': score
+                })
+                
+                self.logger.debug(f"Loaded pattern '{name}': {regex} (score: {score})")
+                
+            except Exception as e:
+                self.logger.error(f"Error loading pattern '{name}': {e}")
+                
+        return patterns
+        
+    def _run(self):
+        """Główna pętla - tail -f na pliku logu"""
+        self.logger.info(f"Tailing log file: {self.log_file}")
+        
+        try:
+            with open(self.log_file, 'r') as f:
+                # Przejdź na koniec pliku
+                f.seek(0, 2)
+                
+                while self.running:
+                    line = f.readline()
+                    
+                    if line:
+                        self.process_line(line.strip())
+                    else:
+                        # Brak nowych linii, czekaj chwilę
+                        time.sleep(0.1)
+                        
+        except FileNotFoundError:
+            self.logger.error(f"Log file not found: {self.log_file}")
+        except PermissionError:
+            self.logger.error(f"Permission denied reading: {self.log_file}")
+        except Exception as e:
+            self.logger.error(f"Error tailing log: {e}")
+            
+    def process_line(self, line):
+        """
+        Przetwarza linię z logu Postfix
+        
+        Przykłady linii:
+        - postfix/smtpd[1234]: warning: unknown[1.2.3.4]: SASL LOGIN authentication failed
+        - postfix/smtpd[1234]: connect from unknown[1.2.3.4]
+        """
+        # Wyciągnij IP
+        ip_match = self.ip_pattern.search(line)
+        if not ip_match:
+            return
+            
+        ip = ip_match.group(1)
+        
+        # Pomiń lokalne IP
+        if ip.startswith('127.') or ip.startswith('192.168.') or ip.startswith('10.'):
+            return
+            
+        # Sprawdź wzorce
+        for pattern in self.patterns:
+            if pattern['regex'].search(line):
+                self.logger.debug(
+                    f"Pattern '{pattern['name']}' matched for IP {ip}"
+                )
+                self.logger.debug(f"Line: {line}")
+                
+                # Zgłoś niepowodzenie do demona
+                self.daemon.track_failure(ip, pattern['score'])
+                
+                # Tylko pierwszy pasujący wzorzec
+                break
diff --git a/utils/init.py b/utils/init.py
new file mode 100644
index 0000000..a6c55a4
--- /dev/null
+++ b/utils/init.py
@@ -0,0 +1,5 @@
+"""
+LogMon Utils - Narzędzia pomocnicze
+"""
+
+__all__ = []
diff --git a/utils/logger.py b/utils/logger.py
new file mode 100644
index 0000000..2cd1896
--- /dev/null
+++ b/utils/logger.py
@@ -0,0 +1,40 @@
+"""
+Pomocnicze funkcje do logowania
+"""
+
+import logging
+import logging.handlers
+
+
+def setup_rotating_logger(name, log_file, max_bytes=10485760, backup_count=5, level=logging.INFO):
+    """
+    Konfiguruje logger z rotacją plików
+    
+    Args:
+        name: Nazwa loggera
+        log_file: Ścieżka do pliku logu
+        max_bytes: Maksymalny rozmiar pliku (domyślnie 10MB)
+        backup_count: Liczba backup plików
+        level: Poziom logowania
+        
+    Returns:
+        Logger object
+    """
+    logger = logging.getLogger(name)
+    logger.setLevel(level)
+    
+    # Rotating file handler
+    handler = logging.handlers.RotatingFileHandler(
+        log_file,
+        maxBytes=max_bytes,
+        backupCount=backup_count
+    )
+    
+    formatter = logging.Formatter(
+        '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+    )
+    handler.setFormatter(formatter)
+    
+    logger.addHandler(handler)
+    
+    return logger