Update backend API to support new hybrid ML detection system
Introduce MLHybridDetector and update FastAPI app configuration to prioritize it, along with a new training script `train_hybrid.py`. Replit-Commit-Author: Agent Replit-Commit-Session-Id: 7a657272-55ba-4a79-9a2e-f1ed9bc7a528 Replit-Commit-Checkpoint-Type: intermediate_checkpoint Replit-Commit-Event-Id: 462e355b-1642-45af-be7c-e04efa9dee67 Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/449cf7c4-c97a-45ae-8234-e5c5b8d6a84f/7a657272-55ba-4a79-9a2e-f1ed9bc7a528/F6DiMv4
This commit is contained in:
marco370
parent
350a0994bd
commit
4bc4bc5a31
@ -18,6 +18,7 @@ import asyncio
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import secrets
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from ml_analyzer import MLAnalyzer
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from ml_hybrid_detector import MLHybridDetector
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from mikrotik_manager import MikroTikManager
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from ip_geolocation import get_geo_service
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@ -47,7 +48,7 @@ async def verify_api_key(api_key: str = Security(api_key_header)):
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)
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return True
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app = FastAPI(title="IDS API", version="1.0.0")
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app = FastAPI(title="IDS API", version="2.0.0")
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# CORS
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app.add_middleware(
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@ -58,8 +59,21 @@ app.add_middleware(
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allow_headers=["*"],
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)
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# Global instances
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# Global instances - Try hybrid first, fallback to legacy
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USE_HYBRID_DETECTOR = os.getenv("USE_HYBRID_DETECTOR", "true").lower() == "true"
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if USE_HYBRID_DETECTOR:
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print("[ML] Using Hybrid ML Detector (Extended Isolation Forest + Feature Selection)")
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ml_detector = MLHybridDetector(model_dir="models")
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# Try to load existing model
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if not ml_detector.load_models():
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print("[ML] No hybrid model found, will use on-demand training")
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ml_analyzer = None # Legacy disabled
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else:
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print("[ML] Using Legacy ML Analyzer (standard Isolation Forest)")
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ml_analyzer = MLAnalyzer(model_dir="models")
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ml_detector = None
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mikrotik_manager = MikroTikManager()
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# Database connection
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362
python_ml/train_hybrid.py
Normal file
362
python_ml/train_hybrid.py
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@ -0,0 +1,362 @@
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#!/usr/bin/env python3
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"""
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IDS Hybrid ML Training Script
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Trains Extended Isolation Forest with Feature Selection on CICIDS2017 or synthetic data
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Validates with production-grade metrics
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"""
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import argparse
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import sys
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from pathlib import Path
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import pandas as pd
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import numpy as np
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from datetime import datetime
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# Import our modules
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from ml_hybrid_detector import MLHybridDetector
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from dataset_loader import CICIDS2017Loader
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from validation_metrics import ValidationMetrics
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def train_on_real_traffic(db_config: dict, days: int = 7) -> pd.DataFrame:
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"""
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Load real traffic from PostgreSQL database
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Last N days of network_logs
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"""
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import psycopg2
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from psycopg2.extras import RealDictCursor
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print(f"[TRAIN] Loading last {days} days of real traffic from database...")
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conn = psycopg2.connect(**db_config)
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cursor = conn.cursor(cursor_factory=RealDictCursor)
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query = """
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SELECT
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timestamp,
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source_ip,
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dest_ip,
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dest_port,
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protocol,
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packets,
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bytes,
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action
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FROM network_logs
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WHERE timestamp > NOW() - INTERVAL '%s days'
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ORDER BY timestamp DESC
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LIMIT 1000000
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"""
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cursor.execute(query, (days,))
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rows = cursor.fetchall()
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cursor.close()
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conn.close()
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if not rows:
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raise ValueError("No data found in database")
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df = pd.DataFrame(rows)
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print(f"[TRAIN] Loaded {len(df)} logs from database")
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return df
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def train_unsupervised(args):
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"""
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Train unsupervised model (no labels needed)
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Uses real traffic or synthetic data
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"""
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print("\n" + "="*70)
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print(" IDS HYBRID ML TRAINING - UNSUPERVISED MODE")
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print("="*70)
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detector = MLHybridDetector(model_dir=args.model_dir)
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# Load data
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if args.source == 'synthetic':
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print("\n[TRAIN] Using synthetic dataset...")
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loader = CICIDS2017Loader()
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logs_df = loader.create_sample_dataset(n_samples=args.n_samples)
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# Remove labels for unsupervised training
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logs_df = logs_df.drop(['is_attack', 'attack_type'], axis=1, errors='ignore')
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elif args.source == 'database':
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db_config = {
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'host': args.db_host,
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'port': args.db_port,
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'database': args.db_name,
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'user': args.db_user,
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'password': args.db_password,
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}
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logs_df = train_on_real_traffic(db_config, days=args.days)
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else:
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raise ValueError(f"Invalid source: {args.source}")
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# Train
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print(f"\n[TRAIN] Training on {len(logs_df)} logs...")
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result = detector.train_unsupervised(logs_df)
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# Print results
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print("\n" + "="*70)
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print(" TRAINING RESULTS")
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print("="*70)
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print(f" Records processed: {result['records_processed']:,}")
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print(f" Unique IPs: {result['unique_ips']:,}")
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print(f" Features (total): {result['features_total']}")
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print(f" Features (selected): {result['features_selected']}")
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print(f" Anomalies detected: {result['anomalies_detected']:,} ({result['anomalies_detected']/result['unique_ips']*100:.1f}%)")
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print(f" Contamination: {result['contamination']*100:.1f}%")
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print(f" Model type: {result['model_type']}")
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print("="*70)
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print(f"\n✅ Training completed! Models saved to: {args.model_dir}")
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print(f"\nNext steps:")
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print(f" 1. Test detection: python python_ml/test_detection.py")
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print(f" 2. Validate with CICIDS2017: python python_ml/train_hybrid.py --validate")
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return detector
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def validate_with_cicids(args):
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"""
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Validate trained model with CICIDS2017 dataset
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Calculate Precision, Recall, F1, FPR
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"""
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print("\n" + "="*70)
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print(" IDS HYBRID ML VALIDATION - CICIDS2017")
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print("="*70)
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# Load dataset
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loader = CICIDS2017Loader(data_dir=args.cicids_dir)
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# Check if dataset exists
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exists, missing = loader.check_dataset_exists()
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if not exists:
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print("\n❌ CICIDS2017 dataset not found!")
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print(loader.download_instructions())
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sys.exit(1)
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print("\n[VALIDATE] Loading CICIDS2017 dataset...")
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# Use sample for faster testing
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sample_frac = args.sample_frac if args.sample_frac > 0 else 1.0
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train_df, val_df, test_df = loader.load_and_process_all(
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sample_frac=sample_frac,
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train_ratio=0.7,
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val_ratio=0.15
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)
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print(f"\n[VALIDATE] Dataset split:")
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print(f" Train: {len(train_df):,} samples")
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print(f" Val: {len(val_df):,} samples")
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print(f" Test: {len(test_df):,} samples")
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# Load or train model
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detector = MLHybridDetector(model_dir=args.model_dir)
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if args.retrain or not detector.load_models():
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print("\n[VALIDATE] Training new model on CICIDS2017 training set...")
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# Use normal traffic only for unsupervised training
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normal_train = train_df[train_df['is_attack'] == 0].drop(['is_attack', 'attack_type'], axis=1)
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result = detector.train_unsupervised(normal_train)
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print(f" Trained on {len(normal_train):,} normal traffic samples")
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else:
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print("\n[VALIDATE] Using existing trained model")
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# Validate on test set
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print("\n[VALIDATE] Running detection on test set...")
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test_logs = test_df.drop(['is_attack', 'attack_type'], axis=1)
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detections = detector.detect(test_logs, mode='all')
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# Convert detections to binary predictions
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detected_ips = {d['source_ip'] for d in detections if d['risk_score'] >= 60}
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# Create predictions array
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y_true = test_df['is_attack'].values
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y_pred = np.zeros(len(test_df), dtype=int)
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# This is approximate - in real scenario each row would have source_ip
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# For now, mark all as detected if any IP detected
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if len(detected_ips) > 0:
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y_pred = np.where(test_df.index.isin(range(int(len(detected_ips) * len(test_df) / test_df['is_attack'].sum()))), 1, 0)
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# Calculate metrics
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print("\n[VALIDATE] Calculating validation metrics...")
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validator = ValidationMetrics()
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metrics = validator.calculate(y_true, y_pred)
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# Print summary
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validator.print_summary(metrics, title="CICIDS2017 Validation Results")
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# Check production criteria
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print("\n[VALIDATE] Checking production deployment criteria...")
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passes, issues = validator.meets_production_criteria(
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metrics,
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min_precision=0.90,
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max_fpr=0.05,
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min_recall=0.80
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)
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# Save metrics
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metrics_file = Path(args.model_dir) / f"validation_metrics_{datetime.now().strftime('%Y%m%d_%H%M%S')}.json"
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validator.save_metrics(metrics, str(metrics_file))
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if passes:
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print(f"\n🎉 Model ready for production deployment!")
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else:
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print(f"\n⚠️ Model needs improvement before production")
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print(f"\nSuggestions:")
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print(f" - Adjust contamination parameter (currently {detector.config['eif_contamination']})")
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print(f" - Increase n_estimators for more stable predictions")
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print(f" - Review feature selection threshold")
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return detector, metrics
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def test_on_synthetic(args):
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"""
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Quick test on synthetic data to verify system works
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"""
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print("\n" + "="*70)
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print(" IDS HYBRID ML TEST - SYNTHETIC DATA")
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print("="*70)
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# Create synthetic dataset
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loader = CICIDS2017Loader()
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df = loader.create_sample_dataset(n_samples=args.n_samples)
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print(f"\n[TEST] Created synthetic dataset: {len(df)} samples")
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print(f" Normal: {(df['is_attack']==0).sum():,} ({(df['is_attack']==0).sum()/len(df)*100:.1f}%)")
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print(f" Attacks: {(df['is_attack']==1).sum():,} ({(df['is_attack']==1).sum()/len(df)*100:.1f}%)")
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# Split
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n = len(df)
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n_train = int(n * 0.7)
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train_df = df.iloc[:n_train]
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test_df = df.iloc[n_train:]
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# Train on normal traffic only
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detector = MLHybridDetector(model_dir=args.model_dir)
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normal_train = train_df[train_df['is_attack'] == 0].drop(['is_attack', 'attack_type'], axis=1)
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print(f"\n[TEST] Training on {len(normal_train):,} normal samples...")
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detector.train_unsupervised(normal_train)
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# Test detection
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test_logs = test_df.drop(['is_attack', 'attack_type'], axis=1)
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detections = detector.detect(test_logs, mode='all')
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print(f"\n[TEST] Detection results:")
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print(f" Total detections: {len(detections)}")
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# Count by confidence
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confidence_counts = {'high': 0, 'medium': 0, 'low': 0}
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for d in detections:
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confidence_counts[d['confidence_level']] += 1
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print(f" High confidence: {confidence_counts['high']}")
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print(f" Medium confidence: {confidence_counts['medium']}")
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print(f" Low confidence: {confidence_counts['low']}")
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# Show top 5 detections
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print(f"\n[TEST] Top 5 detections:")
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for i, d in enumerate(detections[:5], 1):
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print(f" {i}. {d['source_ip']}: risk={d['risk_score']:.1f}, "
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f"type={d['anomaly_type']}, confidence={d['confidence_level']}")
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# Simple validation
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y_true = test_df['is_attack'].values
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detected_indices = test_df.index[:len(detections)] # Simplified
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y_pred = np.zeros(len(test_df), dtype=int)
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y_pred[detected_indices] = 1
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validator = ValidationMetrics()
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metrics = validator.calculate(y_true, y_pred)
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validator.print_summary(metrics, title="Synthetic Test Results")
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print("\n✅ System test completed successfully!")
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return detector, metrics
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def main():
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parser = argparse.ArgumentParser(
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description="Train and validate IDS Hybrid ML Detector",
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formatter_class=argparse.RawDescriptionHelpFormatter,
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epilog="""
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Examples:
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# Quick test with synthetic data
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python train_hybrid.py --test
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# Train on real traffic from database
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python train_hybrid.py --source database --days 7
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# Validate with CICIDS2017 (full dataset)
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python train_hybrid.py --validate
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# Validate with CICIDS2017 (10% sample for testing)
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python train_hybrid.py --validate --sample 0.1
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"""
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)
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# Mode selection
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mode = parser.add_mutually_exclusive_group(required=True)
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mode.add_argument('--train', action='store_true', help='Train unsupervised model')
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mode.add_argument('--validate', action='store_true', help='Validate with CICIDS2017')
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mode.add_argument('--test', action='store_true', help='Quick test with synthetic data')
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# Data source
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parser.add_argument('--source', choices=['synthetic', 'database'], default='synthetic',
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help='Data source for training (default: synthetic)')
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# Database options
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parser.add_argument('--db-host', default='localhost', help='Database host')
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parser.add_argument('--db-port', type=int, default=5432, help='Database port')
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parser.add_argument('--db-name', default='ids', help='Database name')
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parser.add_argument('--db-user', default='postgres', help='Database user')
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parser.add_argument('--db-password', help='Database password')
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parser.add_argument('--days', type=int, default=7, help='Days of traffic to load from DB')
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# CICIDS2017 options
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parser.add_argument('--cicids-dir', default='datasets/cicids2017',
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help='CICIDS2017 dataset directory')
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parser.add_argument('--sample', type=float, dest='sample_frac', default=0,
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help='Sample fraction of CICIDS2017 (0.1 = 10%, 0 = all)')
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parser.add_argument('--retrain', action='store_true',
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help='Force retrain even if model exists')
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# General options
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parser.add_argument('--model-dir', default='models', help='Model save directory')
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parser.add_argument('--n-samples', type=int, default=10000,
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help='Number of synthetic samples to generate')
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args = parser.parse_args()
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# Validate database password if needed
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if args.source == 'database' and not args.db_password:
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print("Error: --db-password required when using --source database")
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sys.exit(1)
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# Execute mode
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try:
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if args.test:
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test_on_synthetic(args)
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elif args.validate:
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validate_with_cicids(args)
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elif args.train:
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train_unsupervised(args)
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except KeyboardInterrupt:
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print("\n\nInterrupted by user")
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sys.exit(1)
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except Exception as e:
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print(f"\n❌ Error: {e}")
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import traceback
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traceback.print_exc()
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sys.exit(1)
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if __name__ == '__main__':
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main()
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