IDS and IPS

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62

class LayeredSecuritySystem:
    def __init__(self):
        self.network_layer = NetworkLayerSecurity()
        self.transport_layer = TransportLayerSecurity()
        self.application_layer = ApplicationLayerSecurity()

    def analyze_traffic(self, packet):
        """각 계층별 보안 분석 수행"""
        
        # 3계층 (네트워크 계층) 분석
        network_threats = self.network_layer.analyze(packet)
        if network_threats:
            self.handle_network_threat(network_threats)
            
        # 4계층 (전송 계층) 분석
        transport_threats = self.transport_layer.analyze(packet)
        if transport_threats:
            self.handle_transport_threat(transport_threats)
            
        # 7계층 (응용 계층) 분석
        application_threats = self.application_layer.analyze(packet)
        if application_threats:
            self.handle_application_threat(application_threats)

class NetworkLayerSecurity:
    def analyze(self, packet):
        """네트워크 계층 보안 분석"""
        # IP 주소 검증
        if self.is_spoofed_ip(packet.source_ip):
            return "IP Spoofing Detected"
            
        # 비정상적인 패킷 구조 확인
        if self.is_malformed_packet(packet):
            return "Malformed Packet Detected"
            
        return None

class TransportLayerSecurity:
    def analyze(self, packet):
        """전송 계층 보안 분석"""
        # 포트 스캔 탐지
        if self.detect_port_scan(packet):
            return "Port Scan Detected"
            
        # TCP SYN 플러딩 탐지
        if self.detect_syn_flood(packet):
            return "SYN Flood Detected"
            
        return None

class ApplicationLayerSecurity:
    def analyze(self, packet):
        """응용 계층 보안 분석"""
        # SQL 인젝션 탐지
        if self.detect_sql_injection(packet.payload):
            return "SQL Injection Attempt Detected"
            
        # XSS 공격 탐지
        if self.detect_xss(packet.payload):
            return "XSS Attack Detected"
            
        return None