SSL & Whois: Website Security Auditing

• Registration Age: <30 days = High risk
• Privacy Protection: Reduces transparency
• Registrar Reputation: Check trustworthiness
• DNS Changes: Frequent modifications suspicious
• Geographic Mismatch: Hosting vs registration location
• Subdomain Proliferation: Excessive subdomain creation
• Blacklist Status: Security vendor listings
• Certificate History: Suspicious SSL patterns

• DNSSEC: DNS authentication and integrity
• SPF Records: Email sender validation
• DMARC Policy: Email authentication policy
• CAA Records: Certificate authority authorization
• BIMI Records: Brand indicator validation
• Registry Lock: Registrar-level protection
• 2FA on Registrar: Account security measures
• Contact Verification: Owner identity confirmation

// Automated security monitoring
class SecurityMonitor {
  constructor() {
    this.monitoringIntervals = new Map();
    this.alertThresholds = {
      certificateExpiry: 30, // days
      domainChanges: 24,     // hours
      securityHeaderChanges: 1 // hour
    };
  }
  
  startMonitoring(domains) {
    domains.forEach(domain => {
      // Certificate monitoring
      this.scheduleCertificateCheck(domain);
      
      // Domain monitoring  
      this.scheduleDomainMonitoring(domain);
      
      // Security headers monitoring
      this.scheduleHeadersMonitoring(domain);
    });
  }
  
  async checkCertificateExpiry(domain) {
    try {
      const cert = await this.getCertificate(domain);
      const daysUntilExpiry = this.calculateDaysUntilExpiry(cert);
      
      if (daysUntilExpiry <= this.alertThresholds.certificateExpiry) {
        await this.sendAlert({
          type: 'CERTIFICATE_EXPIRY',
          domain,
          severity: daysUntilExpiry <= 7 ? 'CRITICAL' : 'WARNING',
          message: `Certificate expires in ${daysUntilExpiry} days`,
          expiryDate: cert.validTo
        });
      }
      
      // Store result for trending
      await this.logMonitoringResult(domain, 'certificate', {
        status: 'valid',
        expiryDate: cert.validTo,
        daysUntilExpiry,
        issuer: cert.issuer
      });
      
    } catch (error) {
      await this.sendAlert({
        type: 'CERTIFICATE_ERROR',
        domain,
        severity: 'CRITICAL',
        message: `Certificate check failed: ${error.message}`
      });
    }
  }
  
  async monitorDomainChanges(domain) {
    const current = await this.getDomainInfo(domain);
    const baseline = await this.getBaselineDomainInfo(domain);
    
    const changes = this.detectChanges(current, baseline);
    
    if (changes.length > 0) {
      await this.sendAlert({
        type: 'DOMAIN_CHANGES',
        domain,
        severity: 'HIGH',
        changes,
        message: `Detected ${changes.length} domain changes`
      });
    }
    
    // Update baseline
    await this.updateBaseline(domain, current);
  }
}

// Incident response automation
class SecurityIncidentResponse {
  constructor() {
    this.responsePlaybooks = this.loadPlaybooks();
    this.escalationMatrix = this.loadEscalationMatrix();
  }
  
  async handleSecurityAlert(alert) {
    // Classify threat severity
    const classification = this.classifyThreat(alert);
    
    // Execute automated response
    if (classification.autoResponse) {
      await this.executeAutomatedResponse(alert, classification);
    }
    
    // Send notifications
    await this.sendNotifications(alert, classification);
    
    // Log incident
    await this.logIncident({
      ...alert,
      classification,
      responseActions: classification.actions,
      timestamp: new Date()
    });
  }
  
  classifyThreat(alert) {
    const rules = {
      'CERTIFICATE_EXPIRED': {
        severity: 'CRITICAL',
        autoResponse: true,
        actions: ['block_domain', 'notify_admin']
      },
      'MALICIOUS_CERTIFICATE': {
        severity: 'CRITICAL',
        autoResponse: true,
        actions: ['quarantine_domain', 'alert_security_team']
      },
      'DOMAIN_HIJACK': {
        severity: 'CRITICAL',
        autoResponse: false,
        actions: ['notify_legal', 'document_evidence']
      },
      'SECURITY_HEADER_REMOVED': {
        severity: 'HIGH',
        autoResponse: false,
        actions: ['notify_dev_team', 'create_ticket']
      }
    };
    
    return rules[alert.type] || {
      severity: 'MEDIUM',
      autoResponse: false,
      actions: ['log_event']
    };
  }
  
  async generateSecurityReport(domain, period = '7d') {
    const report = {
      domain,
      period,
      generatedAt: new Date(),
      summary: {},
      incidents: [],
      recommendations: []
    };
    
    // Gather monitoring data
    const monitoringData = await this.getMonitoringData(domain, period);
    
    // Generate summary
    report.summary = {
      totalChecks: monitoringData.length,
      incidentsFound: monitoringData.filter(d => d.hasIssues).length,
      certificateHealth: this.assessCertificateHealth(monitoringData),
      domainSecurity: this.assessDomainSecurity(monitoringData)
    };
    
    return report;
  }
}