What security features does SSLcat have?

SSLcat has built-in multi-layered security mechanisms to protect your services from various network attacks and malicious access.

Intelligent IP Blocking System

This is a core security feature of SSLcat, based on a dynamic banning policy on the number of failures:

• Short-term Ban - 3 failures within 1 minute result in a 5-minute ban
• Long-term Ban - 10 failures within 5 minutes result in a 1-hour ban
• Automatic Unban - Bans are automatically lifted upon expiration
• Whitelist Mechanism - Supports IP whitelisting to prevent false positives

TLS Client Fingerprinting

Advanced client identification technology based on ClientHello characteristics:

• Fingerprint Analysis - Analyzes client characteristics in the TLS handshake
• Malicious Detection - Identifies known malicious clients
• Anomaly Detection - Detects abnormal TLS handshake patterns
• Automatic Interception - Automatically intercepts suspicious client connections

User-Agent Validation

Filters out malicious and non-standard clients:

• Blacklist Filtering - Blocks known malicious User-Agents
• Format Validation - Checks the validity of the User-Agent format
• Rate Limiting - Limits the access frequency of the same User-Agent
• Custom Rules - Supports custom User-Agent filtering rules

Access Logging

Complete access trail tracking and auditing:

• Detailed Logs - Records detailed information of all access requests
• Real-time Monitoring - Displays real-time access statistics and abnormal behavior
• Log Analysis - Provides access pattern analysis and reports
• Security Events - Records all security-related events

Production Environment Optimization

Relaxed security thresholds for high-traffic scenarios:

• Dynamic Adjustment - Automatically adjusts security policies based on traffic
• Performance First - Optimizes performance while ensuring security
• False Positive Control - Reduces false bans on normal users
• Load Balancing - Supports security policy synchronization across multiple instances

Configuration Example

Here is a typical security configuration example:

# Security Configuration
security:
  # IP Ban Configuration
  ip_ban:
    short_ban_threshold: 3      # Short-term ban threshold
    short_ban_duration: 300     # Short-term ban duration (seconds)
    long_ban_threshold: 10      # Long-term ban threshold
    long_ban_duration: 3600     # Long-term ban duration (seconds)
  
  # TLS Fingerprint Configuration
  tls_fingerprint:
    enabled: true
    strict_mode: false          # Recommended to disable strict mode in production
  
  # User-Agent Filtering
  user_agent_filter:
    enabled: true
    blacklist: ["bot", "crawler", "scanner"]
  
  # Access Log
  access_log:
    enabled: true
    level: "info"
    format: "json"

Monitoring and Alerting

SSLcat provides real-time security monitoring:

• Attack Statistics - Displays statistics for various types of attacks
• Ban List - Shows a real-time list of banned IP addresses
• Anomaly Alerts - Sends alerts when abnormal behavior is detected
• Performance Metrics - Shows the performance impact of security features

Best Practices

Recommendations for using security features:

• Progressive Deployment - First, verify security policies in a test environment
• Monitor and Adjust - Adjust thresholds based on actual usage
• Whitelist Management - Keep the IP whitelist updated
• Log Analysis - Regularly analyze access logs to optimize policies
• Backup and Recovery - Back up security configurations for quick recovery

Troubleshooting

Common issues with security features:

• False Positives - Check whitelist configuration, adjust ban thresholds
• Performance Impact - Optimize security policies, reduce unnecessary checks
• Large Logs - Configure log rotation, regularly clean up old logs
• Configuration Errors - Validate configuration file syntax, check parameter settings

SSLcat's security features provide comprehensive protection for your services, ensuring you can fend off various network threats while enjoying high performance.