Skip to main content

Release history

Every released version of TestingBot Tunnel, newest first. New features, improvements and bug fixes.

  1. v4.8

    May 2026 Current
    • Added a Prometheus /metrics endpoint exposing HTTP request rate, duration and size histograms, HTTPS CONNECT counters, SSH tunnel state and reconnects, active connections, error counters and JVM/process metrics
    • Added --metrics-auth user:password to protect the metrics endpoint with HTTP Basic Authentication
    • Added TESTINGBOT_AUTH, TESTINGBOT_PROXY_USERPWD and TESTINGBOT_METRICS_AUTH environment variables so credentials stay out of the process list
    • Sensitive headers are now stripped from debug logging
    • Improved basic authentication handling and logging
    • Updated dependencies

  2. v4.7

    March 2026
    • Fixed an issue with WebSocket proxying

  3. v4.6

    January 2026
    • Fixed an issue with --debug

  4. v4.5

    January 2026
    • Added -s, --shared to share a tunnel with colleagues on your team. Tunnels are not shared by default
    • Updated dependencies
    • Code improvements

  5. v4.4

    October 2025
    • Improved --proxy and --proxy-userpwd reliability
    • Updated dependencies

  6. v4.3

    August 2025
    • Enhanced --doctor diagnostic checks
    • Improved connection monitoring and automatic retry mechanisms
    • Updated Jetty and SSH libraries
    • Dropped support for Java 8 (Java 11+ now required)

  7. v4.0

    December 2024
    • Added WebSocket and Server-Sent Events (SSE) support
    • Added --nobump option to disable SSL bumping
    • Upgraded to Jetty 11

  8. v3.5

    May 2023
    • Upgraded secure connection ciphers for improved security
    • Updated dependencies

  9. v3.2

    February 2021
    • Updated dependencies for security and compatibility

  10. v3.1

    February 2020
    • Fixed tunnel polling to prevent indefinite connection attempts
    • Built with Java 8 for broader compatibility
    • Internal code improvements

  11. v3.0

    September 2019
    • Updated Jetty dependencies
    • Various stability improvements

  12. v2.9

    January 2019
    • Various minor fixes to timeout handling and --doctor checks

  13. v2.8

    June 2018
    • Fixed null pointer exception in connection handler

  14. v2.7

    June 2018
    • Added upstream HTTPS proxy support via CONNECT method (--proxy)
    • Renamed --jettyport option to --localport
    • Enabled --nocache integration with Manual Testing API
    • Removed hardcoded port restrictions

  15. v2.6

    April 2018
    • Added option to inject custom HTTP headers into requests
    • Added automatic basic authentication for configured hosts
    • Clarified --nocache behavior: disables all HTTP request caching
    • Removed deprecated --boost and --ssl options
    • Fixed incorrect Java version detection

  16. v2.5

    September 2017
    • The tunnel now reports its version to TestingBot
    • Added --pac option to configure a PAC (Proxy Auto-Config) URL for test sessions

  17. v2.4

    August 2017
    • Added --tunnel-identifier to run multiple tunnels on the same account
    • Added local directory serving for static file testing
    • Added embedded REST API for tunnel statistics (default port 8003)
    • Improved logging with configurable output format, file logging, and debug levels
    • Improved connection error handling with automatic reconnection

  18. v2.3

    October 2016
    • Added --doctor command to troubleshoot configuration issues
    • Debug mode now outputs HTTP headers for easier troubleshooting
Was this page helpful?
Last updated
TestingBot Docs