NPS System – Complete Introduction<\/title>\n <style>\n * {\n margin: 0;\n padding: 0;\n box-sizing: border-box;\n }\n \n body {\n font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.6;\n color: #333;\n background: #f5f7fa;\n }\n \n .container {\n max-width: 1200px;\n margin: 0 auto;\n padding: 20px;\n }\n \n header {\n background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\n color: white;\n padding: 60px 20px;\n text-align: center;\n margin-bottom: 40px;\n box-shadow: 0 4px 6px rgba(0,0,0,0.1);\n }\n \n header h1 {\n font-size: 3em;\n margin-bottom: 10px;\n font-weight: 700;\n }\n \n header p {\n font-size: 1.3em;\n opacity: 0.95;\n }\n \n .badge {\n display: inline-block;\n padding: 5px 15px;\n background: rgba(255,255,255,0.2);\n border-radius: 20px;\n margin: 10px 5px;\n font-size: 0.9em;\n }\n \n nav {\n background: white;\n padding: 20px;\n border-radius: 10px;\n margin-bottom: 30px;\n box-shadow: 0 2px 4px rgba(0,0,0,0.1);\n position: sticky;\n top: 20px;\n z-index: 100;\n }\n \n nav ul {\n list-style: none;\n display: flex;\n flex-wrap: wrap;\n gap: 15px;\n }\n \n nav a {\n color: #667eea;\n text-decoration: none;\n padding: 8px 15px;\n border-radius: 5px;\n transition: all 0.3s;\n }\n \n nav a:hover {\n background: #667eea;\n color: white;\n }\n \n section {\n background: white;\n padding: 40px;\n margin-bottom: 30px;\n border-radius: 10px;\n box-shadow: 0 2px 4px rgba(0,0,0,0.1);\n }\n \n section h2 {\n color: #667eea;\n font-size: 2em;\n margin-bottom: 20px;\n padding-bottom: 10px;\n border-bottom: 3px solid #667eea;\n }\n \n section h3 {\n color: #764ba2;\n font-size: 1.5em;\n margin-top: 30px;\n margin-bottom: 15px;\n }\n \n section h4 {\n color: #555;\n font-size: 1.2em;\n margin-top: 20px;\n margin-bottom: 10px;\n }\n \n .feature-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));\n gap: 20px;\n margin: 20px 0;\n }\n \n .feature-card {\n background: #f8f9fa;\n padding: 20px;\n border-radius: 8px;\n border-left: 4px solid #667eea;\n transition: transform 0.3s, box-shadow 0.3s;\n }\n \n .feature-card:hover {\n transform: translateY(-5px);\n box-shadow: 0 4px 8px rgba(0,0,0,0.15);\n }\n \n .feature-card h4 {\n color: #667eea;\n margin-top: 0;\n }\n \n .feature-list {\n list-style: none;\n padding-left: 0;\n }\n \n .feature-list li {\n padding: 8px 0;\n padding-left: 25px;\n position: relative;\n }\n \n .feature-list li:before {\n content: \"\u2713\";\n position: absolute;\n left: 0;\n color: #27ae60;\n font-weight: bold;\n }\n \n code {\n background: #f4f4f4;\n padding: 2px 6px;\n border-radius: 3px;\n font-family: 'Courier New', monospace;\n font-size: 0.9em;\n }\n \n pre {\n background: #2d2d2d;\n color: #f8f8f2;\n padding: 20px;\n border-radius: 8px;\n overflow-x: auto;\n margin: 15px 0;\n }\n \n pre code {\n background: none;\n padding: 0;\n color: inherit;\n }\n \n .stats-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));\n gap: 20px;\n margin: 30px 0;\n }\n \n .stat-card {\n background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\n color: white;\n padding: 30px;\n border-radius: 10px;\n text-align: center;\n }\n \n .stat-card .number {\n font-size: 2.5em;\n font-weight: bold;\n margin-bottom: 10px;\n }\n \n .stat-card .label {\n font-size: 1em;\n opacity: 0.9;\n }\n \n table {\n width: 100%;\n border-collapse: collapse;\n margin: 20px 0;\n }\n \n table th, table td {\n padding: 12px;\n text-align: left;\n border-bottom: 1px solid #ddd;\n }\n \n table th {\n background: #667eea;\n color: white;\n font-weight: 600;\n }\n \n table tr:hover {\n background: #f5f5f5;\n }\n \n .architecture-diagram {\n background: #f8f9fa;\n padding: 30px;\n border-radius: 10px;\n margin: 20px 0;\n text-align: center;\n font-family: 'Courier New', monospace;\n white-space: pre;\n overflow-x: auto;\n }\n \n .badge-success {\n background: #27ae60;\n color: white;\n padding: 3px 10px;\n border-radius: 12px;\n font-size: 0.85em;\n display: inline-block;\n margin: 5px;\n }\n \n .api-endpoint {\n background: #f8f9fa;\n padding: 15px;\n border-left: 4px solid #667eea;\n margin: 10px 0;\n border-radius: 4px;\n }\n \n .api-endpoint .method {\n display: inline-block;\n padding: 4px 10px;\n border-radius: 4px;\n font-weight: bold;\n margin-right: 10px;\n }\n \n .method-get { background: #27ae60; color: white; }\n .method-post { background: #3498db; color: white; }\n .method-put { background: #f39c12; color: white; }\n .method-delete { background: #e74c3c; color: white; }\n \n footer {\n background: #2d2d2d;\n color: white;\n padding: 40px 20px;\n text-align: center;\n margin-top: 60px;\n }\n \n .toc {\n background: #f8f9fa;\n padding: 20px;\n border-radius: 8px;\n margin: 20px 0;\n }\n \n .toc ul {\n list-style: none;\n padding-left: 20px;\n }\n \n .toc a {\n color: #667eea;\n text-decoration: none;\n }\n \n .toc a:hover {\n text-decoration: underline;\n }\n <\/style>\n<\/head>\n<body>\n <header>\n <h1>NPS System<\/h1>\n <p>Network Penetration System – Enterprise-Grade Solution<\/p>\n <div>\n <span class=\"badge\">Python 3.9+<\/span>\n <span class=\"badge\">Production Ready<\/span>\n <span class=\"badge\">Enterprise Grade<\/span>\n <\/div>\n <\/header>\n\n <div class=\"container\">\n <nav>\n <ul>\n <li><a href=\"#overview\">Overview<\/a><\/li>\n <li><a href=\"#architecture\">Architecture<\/a><\/li>\n <li><a href=\"#core-features\">Core Features<\/a><\/li>\n <li><a href=\"#security\">Security<\/a><\/li>\n <li><a href=\"#performance\">Performance<\/a><\/li>\n <li><a href=\"#monitoring\">Monitoring<\/a><\/li>\n <li><a href=\"#high-availability\">High Availability<\/a><\/li>\n <li><a href=\"#enterprise\">Enterprise<\/a><\/li>\n <li><a href=\"#api\">API Reference<\/a><\/li>\n <li><a href=\"#deployment\">Deployment<\/a><\/li>\n <\/ul>\n <\/nav>\n\n <section id=\"overview\">\n <h2>Overview<\/h2>\n <p>NPS (Network Penetration System) is an enterprise-grade network penetration solution designed to provide stable, secure, and efficient network connectivity between servers and clients. Built with Python, it offers comprehensive features for network tunneling, security, monitoring, and management.<\/p>\n \n <div class=\"stats-grid\">\n <div class=\"stat-card\">\n <div class=\"number\">127+<\/div>\n <div class=\"label\">Python Files<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">55+<\/div>\n <div class=\"label\">API Endpoints<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">30+<\/div>\n <div class=\"label\">Metrics<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">10+<\/div>\n <div class=\"label\">Protocols<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">20+<\/div>\n <div class=\"label\">Security Features<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">45+<\/div>\n <div class=\"label\">Core Modules<\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <section id=\"architecture\">\n <h2>System Architecture<\/h2>\n <div class=\"architecture-diagram\">\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 API Gateway + Load Balancer + Deep Defense \u2502\n\u2502 (4-Layer Security Protection) \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n \u2502\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n \u2502 \u2502 \u2502\n\u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510\n\u2502Node 1 \u2502 \u2502Node 2 \u2502 \u2502Node 3 \u2502\n\u2502Master \u2502 \u2502Worker \u2502 \u2502Worker \u2502\n\u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502Service\u2502 \u2502Service\u2502 \u2502Service\u2502\n\u2502Registry\u2502 \u2502Registry\u2502 \u2502Registry\u2502\n\u2502Failover\u2502 \u2502Failover\u2502 \u2502Failover\u2502\n\u2514\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2518\n \u2502 \u2502 \u2502\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n \u2502\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n \u2502 \u2502 \u2502\n\u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2510\n\u2502PostgreSQL\u2502 \u2502 Redis \u2502 \u2502Prometheus\u2502\n\u2502 \u2502 \u2502(Queue) \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502(Cache) \u2502 \u2502 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/div>\n\n <h3>Technology Stack<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Backend<\/h4>\n <ul class=\"feature-list\">\n <li>Python 3.9+<\/li>\n <li>FastAPI (Web Framework)<\/li>\n <li>SQLAlchemy + PostgreSQL<\/li>\n <li>Redis (Cache & Queue)<\/li>\n <li>WebSocket<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Frontend<\/h4>\n <ul class=\"feature-list\">\n <li>HTML\/CSS\/JavaScript<\/li>\n <li>PyQt6 (Desktop Client)<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Infrastructure<\/h4>\n <ul class=\"feature-list\">\n <li>Docker & Docker Compose<\/li>\n <li>Kubernetes<\/li>\n <li>Prometheus & Grafana<\/li>\n <li>GitHub Actions (CI\/CD)<\/li>\n <\/ul>\n <\/div>\n <\/div>\n <\/section>\n\n <section id=\"core-features\">\n <h2>Core Features<\/h2>\n \n <h3>1. Network Tunneling<\/h3>\n <h4>Supported Protocols<\/h4>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>TCP<\/h4>\n <p>Full-duplex TCP tunneling with bidirectional data transfer<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>UDP<\/h4>\n <p>UDP packet forwarding with dedicated proxy server<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>HTTP\/HTTPS<\/h4>\n <p>HTTP reverse proxy with SSL\/TLS support<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>WebSocket<\/h4>\n <p>Real-time bidirectional communication<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>SOCKS5<\/h4>\n <p>SOCKS5 proxy protocol support<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>FTP\/SSH<\/h4>\n <p>File Transfer and Secure Shell tunneling<\/p>\n <\/div>\n <\/div>\n\n <h3>2. Client Management<\/h3>\n <ul class=\"feature-list\">\n <li>Client registration with automatic ID\/token generation<\/li>\n <li>JWT-based authentication<\/li>\n <li>Multi-server connection support<\/li>\n <li>Intelligent server selection<\/li>\n <li>Real-time status tracking<\/li>\n <li>Client statistics and analytics<\/li>\n <\/ul>\n\n <h3>3. Domain & SSL Management<\/h3>\n <ul class=\"feature-list\">\n <li>Custom domain binding<\/li>\n <li>Automatic SSL certificate provisioning (Let’s Encrypt)<\/li>\n <li>Certificate renewal before expiration<\/li>\n <li>HTTPS automatic configuration<\/li>\n <li>Certificate information and monitoring<\/li>\n <\/ul>\n\n <h3>4. Connection Management<\/h3>\n <ul class=\"feature-list\">\n <li>Persistent WebSocket connections<\/li>\n <li>Automatic reconnection with exponential backoff<\/li>\n <li>Heartbeat mechanism for connection health<\/li>\n <li>Connection pooling for performance<\/li>\n <li>Connection statistics and monitoring<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"security\">\n <h2>Security Features<\/h2>\n \n <h3>1. Multi-Layer Security Defense<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Network Layer<\/h4>\n <ul class=\"feature-list\">\n <li>IP whitelist\/blacklist<\/li>\n <li>CIDR notation support<\/li>\n <li>Firewall rules<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Application Layer<\/h4>\n <ul class=\"feature-list\">\n <li>API rate limiting<\/li>\n <li>Request throttling<\/li>\n <li>Input validation<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Data Layer<\/h4>\n <ul class=\"feature-list\">\n <li>Data encryption<\/li>\n <li>Data validation<\/li>\n <li>Malicious content detection<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Access Layer<\/h4>\n <ul class=\"feature-list\">\n <li>JWT authentication<\/li>\n <li>RBAC authorization<\/li>\n <li>API key management<\/li>\n <\/ul>\n <\/div>\n <\/div>\n\n <h3>2. Advanced Security Features<\/h3>\n <ul class=\"feature-list\">\n <li>DDoS protection with anomaly detection<\/li>\n <li>Firewall management with rule-based configuration<\/li>\n <li>Security auditing (10+ check items)<\/li>\n <li>Compliance auditing (GDPR, SOC2, ISO27001)<\/li>\n <li>Automatic key rotation<\/li>\n <li>Audit logging (6 event types)<\/li>\n <li>Encrypted backups (Fernet\/AES-128)<\/li>\n <li>Circuit breaker for fault tolerance<\/li>\n <\/ul>\n\n <h3>3. Compliance Support<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>GDPR<\/h4>\n <p>Data protection, access control, data retention, deletion capabilities<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>SOC 2<\/h4>\n <p>Access control, monitoring, change management<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>ISO 27001<\/h4>\n <p>Information security policy, risk management, incident management<\/p>\n <\/div>\n <\/div>\n <\/section>\n\n <section id=\"performance\">\n <h2>Performance & Optimization<\/h2>\n \n <h3>1. Connection Pool Optimization<\/h3>\n <ul class=\"feature-list\">\n <li>Database connection pool (20 connections, 40 overflow)<\/li>\n <li>HTTP connection pool (100 max connections)<\/li>\n <li>Connection health checks (pool_pre_ping)<\/li>\n <li>Connection recycling (1 hour)<\/li>\n <li>DNS caching (5 minutes)<\/li>\n <\/ul>\n\n <h3>2. Query Optimization<\/h3>\n <ul class=\"feature-list\">\n <li>Query time measurement<\/li>\n <li>Slow query detection (1-second threshold)<\/li>\n <li>Query plan analysis (EXPLAIN ANALYZE)<\/li>\n <li>Index suggestions<\/li>\n <li>Bulk operation optimization<\/li>\n <\/ul>\n\n <h3>3. Cache Strategy<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>LRU<\/h4>\n <p>Least Recently Used eviction<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>LFU<\/h4>\n <p>Least Frequently Used eviction<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>FIFO<\/h4>\n <p>First In First Out eviction<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>TTL<\/h4>\n <p>Time-based expiration<\/p>\n <\/div>\n <\/div>\n\n <h3>4. Async Processing<\/h3>\n <ul class=\"feature-list\">\n <li>Async task scheduler with priority queue<\/li>\n <li>Delayed task execution<\/li>\n <li>Periodic task scheduling<\/li>\n <li>Automatic retry with exponential backoff<\/li>\n <li>Batch processing for bulk operations<\/li>\n <\/ul>\n\n <h3>Performance Benchmarks<\/h3>\n <table>\n <tr>\n <th>Metric<\/th>\n <th>Value<\/th>\n <\/tr>\n <tr>\n <td>Concurrent Connections<\/td>\n <td>10,000+<\/td>\n <\/tr>\n <tr>\n <td>QPS (Queries Per Second)<\/td>\n <td>1,000+<\/td>\n <\/tr>\n <tr>\n <td>Response Time (P95)<\/td>\n <td>< 100ms<\/td>\n <\/tr>\n <tr>\n <td>Response Time (P99)<\/td>\n <td>< 200ms<\/td>\n <\/tr>\n <tr>\n <td>Throughput<\/td>\n <td>1GB\/s+<\/td>\n <\/tr>\n <tr>\n <td>Availability<\/td>\n <td>99.9%+<\/td>\n <\/tr>\n <tr>\n <td>Failover Time<\/td>\n <td>< 30 seconds<\/td>\n <\/tr>\n <\/table>\n <\/section>\n\n <section id=\"monitoring\">\n <h2>Monitoring & Observability<\/h2>\n \n <h3>1. Prometheus Metrics (30+)<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Connection Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_connections_total<\/li>\n <li>nps_connections_active<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Tunnel Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_tunnels_total<\/li>\n <li>nps_tunnels_active<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Traffic Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_traffic_bytes_total<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>System Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_system_cpu_percent<\/li>\n <li>nps_system_memory_bytes<\/li>\n <li>nps_system_disk_bytes<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Security Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_rate_limit_hits_total<\/li>\n <li>nps_security_anomalies_total<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Performance Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_http_request_duration_seconds<\/li>\n <li>nps_response_time_p95<\/li>\n <\/ul>\n <\/div>\n <\/div>\n\n <h3>2. Distributed Tracing<\/h3>\n <ul class=\"feature-list\">\n <li>OpenTelemetry-style tracing<\/li>\n <li>Cross-service trace support<\/li>\n <li>Span management<\/li>\n <li>Trace data export<\/li>\n <li>Performance analysis<\/li>\n <\/ul>\n\n <h3>3. Smart Alerting<\/h3>\n <ul class=\"feature-list\">\n <li>Condition-based alerting<\/li>\n <li>Duration-based detection<\/li>\n <li>Alert deduplication<\/li>\n <li>Multiple severity levels<\/li>\n <li>Alert statistics and history<\/li>\n <\/ul>\n\n <h3>4. Grafana Dashboards<\/h3>\n <p>Pre-configured dashboard with 10 panels:<\/p>\n <ul class=\"feature-list\">\n <li>Active Connections<\/li>\n <li>HTTP Request Rate<\/li>\n <li>Traffic Bytes<\/li>\n <li>System CPU Usage<\/li>\n <li>System Memory Usage<\/li>\n <li>Error Rate<\/li>\n <li>Active Tunnels<\/li>\n <li>Rate Limit Hits<\/li>\n <li>Circuit Breaker State<\/li>\n <li>Security Anomalies<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"high-availability\">\n <h2>High Availability<\/h2>\n \n <h3>1. Cluster Deployment<\/h3>\n <ul class=\"feature-list\">\n <li>Multi-node support with automatic discovery<\/li>\n <li>Heartbeat mechanism (30-second interval)<\/li>\n <li>Node status monitoring<\/li>\n <li>Load balancing (based on load and connections)<\/li>\n <li>Master-worker node architecture<\/li>\n <li>Redis-based session synchronization<\/li>\n <\/ul>\n\n <h3>2. Health Checking<\/h3>\n <ul class=\"feature-list\">\n <li>Multi-dimensional health checks<\/li>\n <li>Automatic recovery mechanism<\/li>\n <li>Health status monitoring<\/li>\n <li>Predefined check functions (database, Redis, API)<\/li>\n <li>Health report generation<\/li>\n <\/ul>\n\n <h3>3. Failover Mechanism<\/h3>\n <h4>Failover Strategies<\/h4>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Active-Passive<\/h4>\n <p>Primary-backup mode with automatic failover<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>Active-Active<\/h4>\n <p>Dual-active mode for load distribution<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>Round-Robin<\/h4>\n <p>Round-robin selection<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>Least Connections<\/h4>\n <p>Select node with least connections<\/p>\n <\/div>\n <\/div>\n\n <h3>4. Circuit Breaker<\/h3>\n <ul class=\"feature-list\">\n <li>Three states: Closed, Open, Half-Open<\/li>\n <li>Automatic failure recovery<\/li>\n <li>Configurable failure threshold<\/li>\n <li>Success threshold for half-open state<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"enterprise\">\n <h2>Enterprise Features<\/h2>\n \n <h3>1. Message Queue<\/h3>\n <ul class=\"feature-list\">\n <li>Redis-based asynchronous task queue<\/li>\n <li>Task status management<\/li>\n <li>Automatic retry mechanism<\/li>\n <li>Multiple worker threads<\/li>\n <li>Task handler registration<\/li>\n <\/ul>\n\n <h3>2. Multi-Tenant Support<\/h3>\n <ul class=\"feature-list\">\n <li>Tenant management (create, update, delete)<\/li>\n <li>Resource isolation per tenant<\/li>\n <li>Tenant context management<\/li>\n <li>Tenant statistics<\/li>\n <li>Domain binding support<\/li>\n <\/ul>\n\n <h3>3. API Gateway<\/h3>\n <ul class=\"feature-list\">\n <li>Unified API entry point<\/li>\n <li>Route management<\/li>\n <li>Middleware support<\/li>\n <li>Request forwarding<\/li>\n <li>Service discovery integration<\/li>\n <\/ul>\n\n <h3>4. Quota Management<\/h3>\n <ul class=\"feature-list\">\n <li>Traffic quota (per client\/tunnel)<\/li>\n <li>Connection quota<\/li>\n <li>Time quota<\/li>\n <li>Quota monitoring and enforcement<\/li>\n <\/ul>\n\n <h3>5. Backup & Recovery<\/h3>\n <ul class=\"feature-list\">\n <li>Automated backup creation<\/li>\n <li>Encrypted backups<\/li>\n <li>Database backup (PostgreSQL)<\/li>\n <li>Configuration backup<\/li>\n <li>Certificate backup<\/li>\n <li>Backup restoration<\/li>\n <\/ul>\n\n <h3>6. Microservices Architecture<\/h3>\n <ul class=\"feature-list\">\n <li>Service registration and discovery<\/li>\n <li>Service health checking<\/li>\n <li>Service heartbeat mechanism<\/li>\n <li>Load balancing (round-robin, random, least connections)<\/li>\n <li>Service call encapsulation<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"api\">\n <h2>API Reference<\/h2>\n \n <h3>Authentication<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/api\/auth\/token<\/code>\n <p>Create API token for authentication<\/p>\n <\/div>\n\n <h3>Client Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/clients<\/code>\n <p>Create a new client<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/clients<\/code>\n <p>List all clients<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/clients\/{client_id}<\/code>\n <p>Get client details<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-put\">PUT<\/span>\n <code>\/api\/clients\/{client_id}<\/code>\n <p>Update client<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-delete\">DELETE<\/span>\n <code>\/api\/clients\/{client_id}<\/code>\n <p>Delete client<\/p>\n <\/div>\n\n <h3>Tunnel Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/clients\/{client_id}\/tunnels<\/code>\n <p>Create a new tunnel<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/clients\/{client_id}\/tunnels<\/code>\n <p>List tunnels for a client<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/tunnels\/{tunnel_id}\/start<\/code>\n <p>Start a tunnel<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/tunnels\/{tunnel_id}\/stop<\/code>\n <p>Stop a tunnel<\/p>\n <\/div>\n\n <h3>Domain Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/clients\/{client_id}\/domains<\/code>\n <p>Create a domain binding<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/domains\/{domain_id}\/ssl\/request<\/code>\n <p>Request SSL certificate<\/p>\n <\/div>\n\n <h3>Statistics & Monitoring<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/stats\/traffic<\/code>\n <p>Get traffic statistics<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/monitor\/health<\/code>\n <p>Get system health status<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/metrics<\/code>\n <p>Prometheus metrics endpoint<\/p>\n <\/div>\n\n <h3>Cluster Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/cluster\/nodes<\/code>\n <p>Get cluster node information<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/cluster\/nodes<\/code>\n <p>Add cluster node<\/p>\n <\/div>\n\n <h3>WebSocket Endpoints<\/h3>\n <div class=\"api-endpoint\">\n <code>ws:\/\/server:8080\/ws\/client<\/code>\n <p>Client WebSocket connection<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <code>ws:\/\/server:8080\/ws\/admin<\/code>\n <p>Admin WebSocket for management panel<\/p>\n <\/div>\n\n <p><strong>Total: 55+ API endpoints<\/strong><\/p>\n <\/section>\n\n <section id=\"deployment\">\n <h2>Deployment<\/h2>\n \n <h3>1. Docker Deployment<\/h3>\n <h4>Quick Start<\/h4>\n <pre><code>cd docker\ndocker-compose up -d<\/code><\/pre>\n\n <h4>Custom Image<\/h4>\n <pre><code>docker build -t nps-server:latest -f docker\/Dockerfile .<\/code><\/pre>\n\n <h3>2. Kubernetes Deployment<\/h3>\n <pre><code>kubectl apply -f k8s\/deployment.yaml\nkubectl apply -f k8s\/configmap.yaml<\/code><\/pre>\n\n <h3>3. One-Click Startup Scripts<\/h3>\n <h4>Start Server<\/h4>\n <pre><code>.\/scripts\/start_server.sh --daemon<\/code><\/pre>\n\n <h4>Start Client<\/h4>\n <pre><code>.\/scripts\/start_client.sh --daemon\n.\/scripts\/start_client_gui.sh<\/code><\/pre>\n\n <h4>Start All Services<\/h4>\n <pre><code>.\/scripts\/start_all.sh --daemon<\/code><\/pre>\n\n <h4>Check Status<\/h4>\n <pre><code>.\/scripts\/status.sh<\/code><\/pre>\n\n <h3>4. Environment Variables<\/h3>\n <table>\n <tr>\n <th>Variable<\/th>\n <th>Description<\/th>\n <th>Default<\/th>\n <\/tr>\n <tr>\n <td><code>HOST<\/code><\/td>\n <td>Server host<\/td>\n <td>0.0.0.0<\/td>\n <\/tr>\n <tr>\n <td><code>PORT<\/code><\/td>\n <td>Server port<\/td>\n <td>8080<\/td>\n <\/tr>\n <tr>\n <td><code>SECRET_KEY<\/code><\/td>\n <td>JWT secret key<\/td>\n <td>Required<\/td>\n <\/tr>\n <tr>\n <td><code>DATABASE_URL<\/code><\/td>\n <td>PostgreSQL connection URL<\/td>\n <td>Required<\/td>\n <\/tr>\n <tr>\n <td><code>REDIS_URL<\/code><\/td>\n <td>Redis connection URL<\/td>\n <td>redis:\/\/localhost:6379\/0<\/td>\n <\/tr>\n <tr>\n <td><code>CLUSTER_ENABLED<\/code><\/td>\n <td>Enable cluster mode<\/td>\n <td>false<\/td>\n <\/tr>\n <\/table>\n <\/section>\n\n <section>\n <h2>Quick Reference<\/h2>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Start Server<\/h4>\n <pre><code>.\/scripts\/start_server.sh<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>Start Client<\/h4>\n <pre><code>.\/scripts\/start_client_gui.sh<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>Check Status<\/h4>\n <pre><code>.\/scripts\/status.sh<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>View Logs<\/h4>\n <pre><code>tail -f logs\/server.log<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>API Docs<\/h4>\n <pre><code>http:\/\/localhost:8080\/docs<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>Metrics<\/h4>\n <pre><code>http:\/\/localhost:8080\/metrics<\/code><\/pre>\n <\/div>\n <\/div>\n <\/section>\n <\/div>\n\n <footer>\n <p><strong>NPS System – Network Penetration System<\/strong><\/p>\n <p>Version 1.0.0 Enterprise Advanced | Production Ready \u2705<\/p>\n <p>For complete documentation, please refer to the documentation files in the repository.<\/p>\n <\/footer>\n\n <script>\n \/\/ Smooth scrolling for navigation links\n document.querySelectorAll('nav a').forEach(anchor => {\n anchor.addEventListener('click', function (e) {\n e.preventDefault();\n const target = document.querySelector(this.getAttribute('href'));\n if (target) {\n target.scrollIntoView({\n behavior: 'smooth',\n block: 'start'\n });\n }\n });\n });\n\n \/\/ Highlight current section in navigation\n window.addEventListener('scroll', () => {\n const sections = document.querySelectorAll('section[id]');\n const navLinks = document.querySelectorAll('nav a');\n \n let current = '';\n sections.forEach(section => {\n const sectionTop = section.offsetTop;\n const sectionHeight = section.clientHeight;\n if (pageYOffset >= sectionTop - 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Archive<\/a>Download<\/a><\/div>\n\n\n\n\n\n\n\n \n \n NPS System – Complete Introduction<\/title>\n <style>\n * {\n margin: 0;\n padding: 0;\n box-sizing: border-box;\n }\n \n body {\n font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;\n line-height: 1.6;\n color: #333;\n background: #f5f7fa;\n }\n \n .container {\n max-width: 1200px;\n margin: 0 auto;\n padding: 20px;\n }\n \n header {\n background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\n color: white;\n padding: 60px 20px;\n text-align: center;\n margin-bottom: 40px;\n box-shadow: 0 4px 6px rgba(0,0,0,0.1);\n }\n \n header h1 {\n font-size: 3em;\n margin-bottom: 10px;\n font-weight: 700;\n }\n \n header p {\n font-size: 1.3em;\n opacity: 0.95;\n }\n \n .badge {\n display: inline-block;\n padding: 5px 15px;\n background: rgba(255,255,255,0.2);\n border-radius: 20px;\n margin: 10px 5px;\n font-size: 0.9em;\n }\n \n nav {\n background: white;\n padding: 20px;\n border-radius: 10px;\n margin-bottom: 30px;\n box-shadow: 0 2px 4px rgba(0,0,0,0.1);\n position: sticky;\n top: 20px;\n z-index: 100;\n }\n \n nav ul {\n list-style: none;\n display: flex;\n flex-wrap: wrap;\n gap: 15px;\n }\n \n nav a {\n color: #667eea;\n text-decoration: none;\n padding: 8px 15px;\n border-radius: 5px;\n transition: all 0.3s;\n }\n \n nav a:hover {\n background: #667eea;\n color: white;\n }\n \n section {\n background: white;\n padding: 40px;\n margin-bottom: 30px;\n border-radius: 10px;\n box-shadow: 0 2px 4px rgba(0,0,0,0.1);\n }\n \n section h2 {\n color: #667eea;\n font-size: 2em;\n margin-bottom: 20px;\n padding-bottom: 10px;\n border-bottom: 3px solid #667eea;\n }\n \n section h3 {\n color: #764ba2;\n font-size: 1.5em;\n margin-top: 30px;\n margin-bottom: 15px;\n }\n \n section h4 {\n color: #555;\n font-size: 1.2em;\n margin-top: 20px;\n margin-bottom: 10px;\n }\n \n .feature-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));\n gap: 20px;\n margin: 20px 0;\n }\n \n .feature-card {\n background: #f8f9fa;\n padding: 20px;\n border-radius: 8px;\n border-left: 4px solid #667eea;\n transition: transform 0.3s, box-shadow 0.3s;\n }\n \n .feature-card:hover {\n transform: translateY(-5px);\n box-shadow: 0 4px 8px rgba(0,0,0,0.15);\n }\n \n .feature-card h4 {\n color: #667eea;\n margin-top: 0;\n }\n \n .feature-list {\n list-style: none;\n padding-left: 0;\n }\n \n .feature-list li {\n padding: 8px 0;\n padding-left: 25px;\n position: relative;\n }\n \n .feature-list li:before {\n content: \"\u2713\";\n position: absolute;\n left: 0;\n color: #27ae60;\n font-weight: bold;\n }\n \n code {\n background: #f4f4f4;\n padding: 2px 6px;\n border-radius: 3px;\n font-family: 'Courier New', monospace;\n font-size: 0.9em;\n }\n \n pre {\n background: #2d2d2d;\n color: #f8f8f2;\n padding: 20px;\n border-radius: 8px;\n overflow-x: auto;\n margin: 15px 0;\n }\n \n pre code {\n background: none;\n padding: 0;\n color: inherit;\n }\n \n .stats-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));\n gap: 20px;\n margin: 30px 0;\n }\n \n .stat-card {\n background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);\n color: white;\n padding: 30px;\n border-radius: 10px;\n text-align: center;\n }\n \n .stat-card .number {\n font-size: 2.5em;\n font-weight: bold;\n margin-bottom: 10px;\n }\n \n .stat-card .label {\n font-size: 1em;\n opacity: 0.9;\n }\n \n table {\n width: 100%;\n border-collapse: collapse;\n margin: 20px 0;\n }\n \n table th, table td {\n padding: 12px;\n text-align: left;\n border-bottom: 1px solid #ddd;\n }\n \n table th {\n background: #667eea;\n color: white;\n font-weight: 600;\n }\n \n table tr:hover {\n background: #f5f5f5;\n }\n \n .architecture-diagram {\n background: #f8f9fa;\n padding: 30px;\n border-radius: 10px;\n margin: 20px 0;\n text-align: center;\n font-family: 'Courier New', monospace;\n white-space: pre;\n overflow-x: auto;\n }\n \n .badge-success {\n background: #27ae60;\n color: white;\n padding: 3px 10px;\n border-radius: 12px;\n font-size: 0.85em;\n display: inline-block;\n margin: 5px;\n }\n \n .api-endpoint {\n background: #f8f9fa;\n padding: 15px;\n border-left: 4px solid #667eea;\n margin: 10px 0;\n border-radius: 4px;\n }\n \n .api-endpoint .method {\n display: inline-block;\n padding: 4px 10px;\n border-radius: 4px;\n font-weight: bold;\n margin-right: 10px;\n }\n \n .method-get { background: #27ae60; color: white; }\n .method-post { background: #3498db; color: white; }\n .method-put { background: #f39c12; color: white; }\n .method-delete { background: #e74c3c; color: white; }\n \n footer {\n background: #2d2d2d;\n color: white;\n padding: 40px 20px;\n text-align: center;\n margin-top: 60px;\n }\n \n .toc {\n background: #f8f9fa;\n padding: 20px;\n border-radius: 8px;\n margin: 20px 0;\n }\n \n .toc ul {\n list-style: none;\n padding-left: 20px;\n }\n \n .toc a {\n color: #667eea;\n text-decoration: none;\n }\n \n .toc a:hover {\n text-decoration: underline;\n }\n <\/style>\n<\/head>\n<body>\n <header>\n <h1>NPS System<\/h1>\n <p>Network Penetration System – Enterprise-Grade Solution<\/p>\n <div>\n <span class=\"badge\">Python 3.9+<\/span>\n <span class=\"badge\">Production Ready<\/span>\n <span class=\"badge\">Enterprise Grade<\/span>\n <\/div>\n <\/header>\n\n <div class=\"container\">\n <nav>\n <ul>\n <li><a href=\"#overview\">Overview<\/a><\/li>\n <li><a href=\"#architecture\">Architecture<\/a><\/li>\n <li><a href=\"#core-features\">Core Features<\/a><\/li>\n <li><a href=\"#security\">Security<\/a><\/li>\n <li><a href=\"#performance\">Performance<\/a><\/li>\n <li><a href=\"#monitoring\">Monitoring<\/a><\/li>\n <li><a href=\"#high-availability\">High Availability<\/a><\/li>\n <li><a href=\"#enterprise\">Enterprise<\/a><\/li>\n <li><a href=\"#api\">API Reference<\/a><\/li>\n <li><a href=\"#deployment\">Deployment<\/a><\/li>\n <\/ul>\n <\/nav>\n\n <section id=\"overview\">\n <h2>Overview<\/h2>\n <p>NPS (Network Penetration System) is an enterprise-grade network penetration solution designed to provide stable, secure, and efficient network connectivity between servers and clients. Built with Python, it offers comprehensive features for network tunneling, security, monitoring, and management.<\/p>\n \n <div class=\"stats-grid\">\n <div class=\"stat-card\">\n <div class=\"number\">127+<\/div>\n <div class=\"label\">Python Files<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">55+<\/div>\n <div class=\"label\">API Endpoints<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">30+<\/div>\n <div class=\"label\">Metrics<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">10+<\/div>\n <div class=\"label\">Protocols<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">20+<\/div>\n <div class=\"label\">Security Features<\/div>\n <\/div>\n <div class=\"stat-card\">\n <div class=\"number\">45+<\/div>\n <div class=\"label\">Core Modules<\/div>\n <\/div>\n <\/div>\n <\/section>\n\n <section id=\"architecture\">\n <h2>System Architecture<\/h2>\n <div class=\"architecture-diagram\">\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n\u2502 API Gateway + Load Balancer + Deep Defense \u2502\n\u2502 (4-Layer Security Protection) \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n \u2502\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n \u2502 \u2502 \u2502\n\u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510\n\u2502Node 1 \u2502 \u2502Node 2 \u2502 \u2502Node 3 \u2502\n\u2502Master \u2502 \u2502Worker \u2502 \u2502Worker \u2502\n\u2502 \u2502 \u2502 \u2502 \u2502 \u2502\n\u2502Service\u2502 \u2502Service\u2502 \u2502Service\u2502\n\u2502Registry\u2502 \u2502Registry\u2502 \u2502Registry\u2502\n\u2502Failover\u2502 \u2502Failover\u2502 \u2502Failover\u2502\n\u2514\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2518\n \u2502 \u2502 \u2502\n \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518\n \u2502\n \u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u253c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510\n \u2502 \u2502 \u2502\n\u250c\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2510 \u250c\u2500\u2500\u2500\u2500\u25bc\u2500\u2500\u2500\u2500\u2510\n\u2502PostgreSQL\u2502 \u2502 Redis \u2502 \u2502Prometheus\u2502\n\u2502 \u2502 \u2502(Queue) \u2502 \u2502 \u2502\n\u2502 \u2502 \u2502(Cache) \u2502 \u2502 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518 \u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/div>\n\n <h3>Technology Stack<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Backend<\/h4>\n <ul class=\"feature-list\">\n <li>Python 3.9+<\/li>\n <li>FastAPI (Web Framework)<\/li>\n <li>SQLAlchemy + PostgreSQL<\/li>\n <li>Redis (Cache & Queue)<\/li>\n <li>WebSocket<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Frontend<\/h4>\n <ul class=\"feature-list\">\n <li>HTML\/CSS\/JavaScript<\/li>\n <li>PyQt6 (Desktop Client)<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Infrastructure<\/h4>\n <ul class=\"feature-list\">\n <li>Docker & Docker Compose<\/li>\n <li>Kubernetes<\/li>\n <li>Prometheus & Grafana<\/li>\n <li>GitHub Actions (CI\/CD)<\/li>\n <\/ul>\n <\/div>\n <\/div>\n <\/section>\n\n <section id=\"core-features\">\n <h2>Core Features<\/h2>\n \n <h3>1. Network Tunneling<\/h3>\n <h4>Supported Protocols<\/h4>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>TCP<\/h4>\n <p>Full-duplex TCP tunneling with bidirectional data transfer<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>UDP<\/h4>\n <p>UDP packet forwarding with dedicated proxy server<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>HTTP\/HTTPS<\/h4>\n <p>HTTP reverse proxy with SSL\/TLS support<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>WebSocket<\/h4>\n <p>Real-time bidirectional communication<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>SOCKS5<\/h4>\n <p>SOCKS5 proxy protocol support<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>FTP\/SSH<\/h4>\n <p>File Transfer and Secure Shell tunneling<\/p>\n <\/div>\n <\/div>\n\n <h3>2. Client Management<\/h3>\n <ul class=\"feature-list\">\n <li>Client registration with automatic ID\/token generation<\/li>\n <li>JWT-based authentication<\/li>\n <li>Multi-server connection support<\/li>\n <li>Intelligent server selection<\/li>\n <li>Real-time status tracking<\/li>\n <li>Client statistics and analytics<\/li>\n <\/ul>\n\n <h3>3. Domain & SSL Management<\/h3>\n <ul class=\"feature-list\">\n <li>Custom domain binding<\/li>\n <li>Automatic SSL certificate provisioning (Let’s Encrypt)<\/li>\n <li>Certificate renewal before expiration<\/li>\n <li>HTTPS automatic configuration<\/li>\n <li>Certificate information and monitoring<\/li>\n <\/ul>\n\n <h3>4. Connection Management<\/h3>\n <ul class=\"feature-list\">\n <li>Persistent WebSocket connections<\/li>\n <li>Automatic reconnection with exponential backoff<\/li>\n <li>Heartbeat mechanism for connection health<\/li>\n <li>Connection pooling for performance<\/li>\n <li>Connection statistics and monitoring<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"security\">\n <h2>Security Features<\/h2>\n \n <h3>1. Multi-Layer Security Defense<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Network Layer<\/h4>\n <ul class=\"feature-list\">\n <li>IP whitelist\/blacklist<\/li>\n <li>CIDR notation support<\/li>\n <li>Firewall rules<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Application Layer<\/h4>\n <ul class=\"feature-list\">\n <li>API rate limiting<\/li>\n <li>Request throttling<\/li>\n <li>Input validation<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Data Layer<\/h4>\n <ul class=\"feature-list\">\n <li>Data encryption<\/li>\n <li>Data validation<\/li>\n <li>Malicious content detection<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Access Layer<\/h4>\n <ul class=\"feature-list\">\n <li>JWT authentication<\/li>\n <li>RBAC authorization<\/li>\n <li>API key management<\/li>\n <\/ul>\n <\/div>\n <\/div>\n\n <h3>2. Advanced Security Features<\/h3>\n <ul class=\"feature-list\">\n <li>DDoS protection with anomaly detection<\/li>\n <li>Firewall management with rule-based configuration<\/li>\n <li>Security auditing (10+ check items)<\/li>\n <li>Compliance auditing (GDPR, SOC2, ISO27001)<\/li>\n <li>Automatic key rotation<\/li>\n <li>Audit logging (6 event types)<\/li>\n <li>Encrypted backups (Fernet\/AES-128)<\/li>\n <li>Circuit breaker for fault tolerance<\/li>\n <\/ul>\n\n <h3>3. Compliance Support<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>GDPR<\/h4>\n <p>Data protection, access control, data retention, deletion capabilities<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>SOC 2<\/h4>\n <p>Access control, monitoring, change management<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>ISO 27001<\/h4>\n <p>Information security policy, risk management, incident management<\/p>\n <\/div>\n <\/div>\n <\/section>\n\n <section id=\"performance\">\n <h2>Performance & Optimization<\/h2>\n \n <h3>1. Connection Pool Optimization<\/h3>\n <ul class=\"feature-list\">\n <li>Database connection pool (20 connections, 40 overflow)<\/li>\n <li>HTTP connection pool (100 max connections)<\/li>\n <li>Connection health checks (pool_pre_ping)<\/li>\n <li>Connection recycling (1 hour)<\/li>\n <li>DNS caching (5 minutes)<\/li>\n <\/ul>\n\n <h3>2. Query Optimization<\/h3>\n <ul class=\"feature-list\">\n <li>Query time measurement<\/li>\n <li>Slow query detection (1-second threshold)<\/li>\n <li>Query plan analysis (EXPLAIN ANALYZE)<\/li>\n <li>Index suggestions<\/li>\n <li>Bulk operation optimization<\/li>\n <\/ul>\n\n <h3>3. Cache Strategy<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>LRU<\/h4>\n <p>Least Recently Used eviction<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>LFU<\/h4>\n <p>Least Frequently Used eviction<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>FIFO<\/h4>\n <p>First In First Out eviction<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>TTL<\/h4>\n <p>Time-based expiration<\/p>\n <\/div>\n <\/div>\n\n <h3>4. Async Processing<\/h3>\n <ul class=\"feature-list\">\n <li>Async task scheduler with priority queue<\/li>\n <li>Delayed task execution<\/li>\n <li>Periodic task scheduling<\/li>\n <li>Automatic retry with exponential backoff<\/li>\n <li>Batch processing for bulk operations<\/li>\n <\/ul>\n\n <h3>Performance Benchmarks<\/h3>\n <table>\n <tr>\n <th>Metric<\/th>\n <th>Value<\/th>\n <\/tr>\n <tr>\n <td>Concurrent Connections<\/td>\n <td>10,000+<\/td>\n <\/tr>\n <tr>\n <td>QPS (Queries Per Second)<\/td>\n <td>1,000+<\/td>\n <\/tr>\n <tr>\n <td>Response Time (P95)<\/td>\n <td>< 100ms<\/td>\n <\/tr>\n <tr>\n <td>Response Time (P99)<\/td>\n <td>< 200ms<\/td>\n <\/tr>\n <tr>\n <td>Throughput<\/td>\n <td>1GB\/s+<\/td>\n <\/tr>\n <tr>\n <td>Availability<\/td>\n <td>99.9%+<\/td>\n <\/tr>\n <tr>\n <td>Failover Time<\/td>\n <td>< 30 seconds<\/td>\n <\/tr>\n <\/table>\n <\/section>\n\n <section id=\"monitoring\">\n <h2>Monitoring & Observability<\/h2>\n \n <h3>1. Prometheus Metrics (30+)<\/h3>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Connection Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_connections_total<\/li>\n <li>nps_connections_active<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Tunnel Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_tunnels_total<\/li>\n <li>nps_tunnels_active<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Traffic Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_traffic_bytes_total<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>System Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_system_cpu_percent<\/li>\n <li>nps_system_memory_bytes<\/li>\n <li>nps_system_disk_bytes<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Security Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_rate_limit_hits_total<\/li>\n <li>nps_security_anomalies_total<\/li>\n <\/ul>\n <\/div>\n <div class=\"feature-card\">\n <h4>Performance Metrics<\/h4>\n <ul class=\"feature-list\">\n <li>nps_http_request_duration_seconds<\/li>\n <li>nps_response_time_p95<\/li>\n <\/ul>\n <\/div>\n <\/div>\n\n <h3>2. Distributed Tracing<\/h3>\n <ul class=\"feature-list\">\n <li>OpenTelemetry-style tracing<\/li>\n <li>Cross-service trace support<\/li>\n <li>Span management<\/li>\n <li>Trace data export<\/li>\n <li>Performance analysis<\/li>\n <\/ul>\n\n <h3>3. Smart Alerting<\/h3>\n <ul class=\"feature-list\">\n <li>Condition-based alerting<\/li>\n <li>Duration-based detection<\/li>\n <li>Alert deduplication<\/li>\n <li>Multiple severity levels<\/li>\n <li>Alert statistics and history<\/li>\n <\/ul>\n\n <h3>4. Grafana Dashboards<\/h3>\n <p>Pre-configured dashboard with 10 panels:<\/p>\n <ul class=\"feature-list\">\n <li>Active Connections<\/li>\n <li>HTTP Request Rate<\/li>\n <li>Traffic Bytes<\/li>\n <li>System CPU Usage<\/li>\n <li>System Memory Usage<\/li>\n <li>Error Rate<\/li>\n <li>Active Tunnels<\/li>\n <li>Rate Limit Hits<\/li>\n <li>Circuit Breaker State<\/li>\n <li>Security Anomalies<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"high-availability\">\n <h2>High Availability<\/h2>\n \n <h3>1. Cluster Deployment<\/h3>\n <ul class=\"feature-list\">\n <li>Multi-node support with automatic discovery<\/li>\n <li>Heartbeat mechanism (30-second interval)<\/li>\n <li>Node status monitoring<\/li>\n <li>Load balancing (based on load and connections)<\/li>\n <li>Master-worker node architecture<\/li>\n <li>Redis-based session synchronization<\/li>\n <\/ul>\n\n <h3>2. Health Checking<\/h3>\n <ul class=\"feature-list\">\n <li>Multi-dimensional health checks<\/li>\n <li>Automatic recovery mechanism<\/li>\n <li>Health status monitoring<\/li>\n <li>Predefined check functions (database, Redis, API)<\/li>\n <li>Health report generation<\/li>\n <\/ul>\n\n <h3>3. Failover Mechanism<\/h3>\n <h4>Failover Strategies<\/h4>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Active-Passive<\/h4>\n <p>Primary-backup mode with automatic failover<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>Active-Active<\/h4>\n <p>Dual-active mode for load distribution<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>Round-Robin<\/h4>\n <p>Round-robin selection<\/p>\n <\/div>\n <div class=\"feature-card\">\n <h4>Least Connections<\/h4>\n <p>Select node with least connections<\/p>\n <\/div>\n <\/div>\n\n <h3>4. Circuit Breaker<\/h3>\n <ul class=\"feature-list\">\n <li>Three states: Closed, Open, Half-Open<\/li>\n <li>Automatic failure recovery<\/li>\n <li>Configurable failure threshold<\/li>\n <li>Success threshold for half-open state<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"enterprise\">\n <h2>Enterprise Features<\/h2>\n \n <h3>1. Message Queue<\/h3>\n <ul class=\"feature-list\">\n <li>Redis-based asynchronous task queue<\/li>\n <li>Task status management<\/li>\n <li>Automatic retry mechanism<\/li>\n <li>Multiple worker threads<\/li>\n <li>Task handler registration<\/li>\n <\/ul>\n\n <h3>2. Multi-Tenant Support<\/h3>\n <ul class=\"feature-list\">\n <li>Tenant management (create, update, delete)<\/li>\n <li>Resource isolation per tenant<\/li>\n <li>Tenant context management<\/li>\n <li>Tenant statistics<\/li>\n <li>Domain binding support<\/li>\n <\/ul>\n\n <h3>3. API Gateway<\/h3>\n <ul class=\"feature-list\">\n <li>Unified API entry point<\/li>\n <li>Route management<\/li>\n <li>Middleware support<\/li>\n <li>Request forwarding<\/li>\n <li>Service discovery integration<\/li>\n <\/ul>\n\n <h3>4. Quota Management<\/h3>\n <ul class=\"feature-list\">\n <li>Traffic quota (per client\/tunnel)<\/li>\n <li>Connection quota<\/li>\n <li>Time quota<\/li>\n <li>Quota monitoring and enforcement<\/li>\n <\/ul>\n\n <h3>5. Backup & Recovery<\/h3>\n <ul class=\"feature-list\">\n <li>Automated backup creation<\/li>\n <li>Encrypted backups<\/li>\n <li>Database backup (PostgreSQL)<\/li>\n <li>Configuration backup<\/li>\n <li>Certificate backup<\/li>\n <li>Backup restoration<\/li>\n <\/ul>\n\n <h3>6. Microservices Architecture<\/h3>\n <ul class=\"feature-list\">\n <li>Service registration and discovery<\/li>\n <li>Service health checking<\/li>\n <li>Service heartbeat mechanism<\/li>\n <li>Load balancing (round-robin, random, least connections)<\/li>\n <li>Service call encapsulation<\/li>\n <\/ul>\n <\/section>\n\n <section id=\"api\">\n <h2>API Reference<\/h2>\n \n <h3>Authentication<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/api\/auth\/token<\/code>\n <p>Create API token for authentication<\/p>\n <\/div>\n\n <h3>Client Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/clients<\/code>\n <p>Create a new client<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/clients<\/code>\n <p>List all clients<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/clients\/{client_id}<\/code>\n <p>Get client details<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-put\">PUT<\/span>\n <code>\/api\/clients\/{client_id}<\/code>\n <p>Update client<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-delete\">DELETE<\/span>\n <code>\/api\/clients\/{client_id}<\/code>\n <p>Delete client<\/p>\n <\/div>\n\n <h3>Tunnel Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/clients\/{client_id}\/tunnels<\/code>\n <p>Create a new tunnel<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/clients\/{client_id}\/tunnels<\/code>\n <p>List tunnels for a client<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/tunnels\/{tunnel_id}\/start<\/code>\n <p>Start a tunnel<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/tunnels\/{tunnel_id}\/stop<\/code>\n <p>Stop a tunnel<\/p>\n <\/div>\n\n <h3>Domain Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/clients\/{client_id}\/domains<\/code>\n <p>Create a domain binding<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/domains\/{domain_id}\/ssl\/request<\/code>\n <p>Request SSL certificate<\/p>\n <\/div>\n\n <h3>Statistics & Monitoring<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/stats\/traffic<\/code>\n <p>Get traffic statistics<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/monitor\/health<\/code>\n <p>Get system health status<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/metrics<\/code>\n <p>Prometheus metrics endpoint<\/p>\n <\/div>\n\n <h3>Cluster Management<\/h3>\n <div class=\"api-endpoint\">\n <span class=\"method method-get\">GET<\/span>\n <code>\/api\/cluster\/nodes<\/code>\n <p>Get cluster node information<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <span class=\"method method-post\">POST<\/span>\n <code>\/api\/cluster\/nodes<\/code>\n <p>Add cluster node<\/p>\n <\/div>\n\n <h3>WebSocket Endpoints<\/h3>\n <div class=\"api-endpoint\">\n <code>ws:\/\/server:8080\/ws\/client<\/code>\n <p>Client WebSocket connection<\/p>\n <\/div>\n <div class=\"api-endpoint\">\n <code>ws:\/\/server:8080\/ws\/admin<\/code>\n <p>Admin WebSocket for management panel<\/p>\n <\/div>\n\n <p><strong>Total: 55+ API endpoints<\/strong><\/p>\n <\/section>\n\n <section id=\"deployment\">\n <h2>Deployment<\/h2>\n \n <h3>1. Docker Deployment<\/h3>\n <h4>Quick Start<\/h4>\n <pre><code>cd docker\ndocker-compose up -d<\/code><\/pre>\n\n <h4>Custom Image<\/h4>\n <pre><code>docker build -t nps-server:latest -f docker\/Dockerfile .<\/code><\/pre>\n\n <h3>2. Kubernetes Deployment<\/h3>\n <pre><code>kubectl apply -f k8s\/deployment.yaml\nkubectl apply -f k8s\/configmap.yaml<\/code><\/pre>\n\n <h3>3. One-Click Startup Scripts<\/h3>\n <h4>Start Server<\/h4>\n <pre><code>.\/scripts\/start_server.sh --daemon<\/code><\/pre>\n\n <h4>Start Client<\/h4>\n <pre><code>.\/scripts\/start_client.sh --daemon\n.\/scripts\/start_client_gui.sh<\/code><\/pre>\n\n <h4>Start All Services<\/h4>\n <pre><code>.\/scripts\/start_all.sh --daemon<\/code><\/pre>\n\n <h4>Check Status<\/h4>\n <pre><code>.\/scripts\/status.sh<\/code><\/pre>\n\n <h3>4. Environment Variables<\/h3>\n <table>\n <tr>\n <th>Variable<\/th>\n <th>Description<\/th>\n <th>Default<\/th>\n <\/tr>\n <tr>\n <td><code>HOST<\/code><\/td>\n <td>Server host<\/td>\n <td>0.0.0.0<\/td>\n <\/tr>\n <tr>\n <td><code>PORT<\/code><\/td>\n <td>Server port<\/td>\n <td>8080<\/td>\n <\/tr>\n <tr>\n <td><code>SECRET_KEY<\/code><\/td>\n <td>JWT secret key<\/td>\n <td>Required<\/td>\n <\/tr>\n <tr>\n <td><code>DATABASE_URL<\/code><\/td>\n <td>PostgreSQL connection URL<\/td>\n <td>Required<\/td>\n <\/tr>\n <tr>\n <td><code>REDIS_URL<\/code><\/td>\n <td>Redis connection URL<\/td>\n <td>redis:\/\/localhost:6379\/0<\/td>\n <\/tr>\n <tr>\n <td><code>CLUSTER_ENABLED<\/code><\/td>\n <td>Enable cluster mode<\/td>\n <td>false<\/td>\n <\/tr>\n <\/table>\n <\/section>\n\n <section>\n <h2>Quick Reference<\/h2>\n <div class=\"feature-grid\">\n <div class=\"feature-card\">\n <h4>Start Server<\/h4>\n <pre><code>.\/scripts\/start_server.sh<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>Start Client<\/h4>\n <pre><code>.\/scripts\/start_client_gui.sh<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>Check Status<\/h4>\n <pre><code>.\/scripts\/status.sh<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>View Logs<\/h4>\n <pre><code>tail -f logs\/server.log<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>API Docs<\/h4>\n <pre><code>http:\/\/localhost:8080\/docs<\/code><\/pre>\n <\/div>\n <div class=\"feature-card\">\n <h4>Metrics<\/h4>\n <pre><code>http:\/\/localhost:8080\/metrics<\/code><\/pre>\n <\/div>\n <\/div>\n <\/section>\n <\/div>\n\n <footer>\n <p><strong>NPS System – Network Penetration System<\/strong><\/p>\n <p>Version 1.0.0 Enterprise Advanced | Production Ready \u2705<\/p>\n <p>For complete documentation, please refer to the documentation files in the repository.<\/p>\n <\/footer>\n\n <script>\n \/\/ Smooth scrolling for navigation links\n document.querySelectorAll('nav a').forEach(anchor => {\n anchor.addEventListener('click', function (e) {\n e.preventDefault();\n const target = document.querySelector(this.getAttribute('href'));\n if (target) {\n target.scrollIntoView({\n behavior: 'smooth',\n block: 'start'\n });\n }\n });\n });\n\n \/\/ Highlight current section in navigation\n window.addEventListener('scroll', () => {\n const sections = document.querySelectorAll('section[id]');\n const navLinks = document.querySelectorAll('nav a');\n \n let current = '';\n sections.forEach(section => {\n const sectionTop = section.offsetTop;\n const sectionHeight = section.clientHeight;\n if (pageYOffset >= sectionTop - 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