TestSSL

TestSSL

TestSSL is an open source command line tool for testing TLS/SSL encryption on networks and servers. It can scan for vulnerabilities, misconfigurations, and weaknesses that could compromise security.
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ssl tls encryption security vulnerability

TestSSL: Open Source Command Line Tool for TLS/SSL Testing

TestSSL is an open source command line tool for testing TLS/SSL encryption on networks and servers. It can scan for vulnerabilities, misconfigurations, and weaknesses that could compromise security.

What is TestSSL?

TestSSL is an open source command line tool used for testing Transport Layer Security (TLS) and Secure Sockets Layer (SSL) encryption on networks, servers, and devices. It can analyze TLS/SSL configuration and scan for vulnerabilities, misconfigurations, weaknesses, and issues that could allow attackers to compromise security.

Some key features of TestSSL include:

  • Checking for weak ciphers, protocols, hashes, and key exchanges
  • Testing certificate validity, expiration, chains, keys, and signatures
  • Detecting heartbleed vulnerabilities, robbery attacks, and other issues
  • Spotting incorrect tls/ssl versions, options, padding, session tickets, and more
  • Supporting testing of IPv4, IPv6, proxies, UNIX sockets, and more
  • Offering various output formats like JSON, CSV, HTML, and more

By scanning with TestSSL, system administrators and security professionals can identify risks in their TLS/SSL encryption setup before attackers exploit any flaws. It works on Linux, Windows, macOS, and other platforms. The tool is frequently updated with checks for new vulnerabilities and is useful for audits, compliance, and real-time monitoring of encryption security.

TestSSL Features

Features

  1. Scans servers for supported SSL/TLS protocols and ciphers
  2. Checks for vulnerabilities like Heartbleed, ROBOT, and more
  3. Performs deep analysis of TLS configurations
  4. Command line interface for automation
  5. Support for testing IPv4 and IPv6

Pricing

  • Open Source

Pros

Open source and free to use

Fast and lightweight

Easy to install and run

Regularly updated vulnerability checks

Highly customizable scans

Cons

Command line only, no GUI

Can generate false positives

Limited reporting compared to commercial products

Requires some Linux/CLI knowledge to use effectively


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