Authentication and Session Management

Configuring authentication represents the most challenging aspect of DAST implementation. Modern applications use diverse authentication mechanisms—OAuth, SAML, multi-factor authentication, CAPTCHAs—that complicate automated scanning. Start with simple form-based authentication before tackling complex scenarios. Record authentication sequences using proxy tools, then replay them during scanning. Many failures result from incorrect authentication configuration rather than tool limitations.

Session management requires careful attention to maintain testing depth. Configure tools to detect and handle session timeouts, refreshing authentication as needed. Some applications implement anti-automation measures that DAST must navigate carefully. Use session fixation features to provide pre-authenticated sessions when automatic authentication proves impossible. Monitor session validity throughout scans to ensure comprehensive coverage.

Advanced authentication scenarios demand creative solutions. For multi-factor authentication, consider dedicated test accounts with reduced MFA requirements. API authentication might require generating long-lived tokens specifically for scanning. Single sign-on environments need careful configuration to handle redirect chains. Document authentication configurations thoroughly—they're often the most complex part of DAST setup and require maintenance as applications evolve.