testssl.sh

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24 articles
How to Test TLS Renegotiation and Session Resumption with testssl.sh

Easily test TLS renegotiation and session resumption with testssl.sh. Use the -R flag for RFC 5746 renegotiation and -S for session IDs tickets & TLS 1.3 0-RTT.

how-to-guide
Mar 1, 2026
How to Customize testssl.sh Behavior Using Environment Variables: A Complete Guide

Learn how to customize testssl.sh behavior using environment variables to set default options. Configure the SSL/TLS scanner permanently without altering command lines. Get the complete guide.

how-to-guide
Mar 1, 2026
Understanding the testssl.sh Rating System: How Grades Are Calculated and What They Mean

Understand the testssl.sh rating system. Learn how protocol support, key exchange, and cipher strength determine grades from A to F for your SSL server.

deep-dive
Mar 1, 2026
How to Test for TLS Compression Vulnerabilities (CRIME & BREACH) with testssl.sh

Easily test for TLS compression vulnerabilities like CRIME and BREACH using the testssl.sh tool. Learn how to secure your servers by identifying and mitigating these risks.

how-to-guide
Mar 1, 2026
Performance Tuning testssl.sh for Large-Scale Scans: A Technical Guide

Boost testssl.sh performance for large scans. Learn to tune parallel mode, MAX_PARALLEL, native SSL, and disable checks for faster results. Maximize efficiency.

performance
Mar 1, 2026
testssl.sh vs SSL Labs: How the Open-Source TLS Scanner Compares to Online Tools

Compare testssl.sh and SSL Labs for TLS testing. Discover how the open-source scanner offers local privacy, custom ports, and CI/CD integration.

comparison
Mar 1, 2026
How to Integrate testssl.sh with Nagios and Icinga for Automated TLS Monitoring

Integrate testssl.sh with Nagios and Icinga for automated TLS monitoring. Leverage plugins to translate exit codes and output into service states for proactive SSL health and vulnerability alerts.

how-to-guide
Mar 1, 2026
How to Identify Weak Ciphers and Deprecated Protocols Using testssl.sh

Easily identify weak ciphers and deprecated protocols with testssl.sh. Discover vulnerabilities and secure your servers with this essential security tool. Learn how now.

how-to-guide
Mar 1, 2026
Common testssl.sh Command-Line Options and Flags: A Complete Guide

Master testssl.sh command-line options and flags. This guide covers essential switches to efficiently scan TLS/SSL configurations and identify vulnerabilities. Optimize your security checks today.

how-to-guide
Mar 1, 2026
How to Test OCSP Stapling and Certificate Revocation Status with testssl.sh

Easily test OCSP stapling and certificate revocation status with testssl.sh. This powerful tool checks external OCSP responders and CRLs for accurate validation directly from TLS handshakes.

how-to-guide
Mar 1, 2026
How testssl.sh Tests HTTP Security Headers: Deep Dive into HSTS, HPKP, and Cookie Flag Detection

Discover how testssl.sh analyzes HTTP security headers like HSTS, HPKP, and cookie flags. Learn about its specialized parsing functions and validation against minimum thresholds.

deep-dive
Mar 1, 2026
How to Run testssl.sh Within Docker Containers: Complete Guide

Learn to run testssl.sh in Docker containers. Use the official image and pass scanner arguments directly with host directory bind mounts for output. Get started now.

how-to-guide
Mar 1, 2026

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