A proxy designed to add TLS encryption to existing clients and servers


Stunnel 5.61

  -  2.9 MB  -  Open Source
  • Latest Version

    Stunnel 5.72

  • Operating System

    Windows 7 64 / Windows 8 64 / Windows 10 64

  • User Rating

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  • Author / Product

    Michal Trojnara / External Link

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Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of Stunnel 5.61.

For those interested in downloading the most recent release of Stunnel or reading our review, simply click here.

All old versions distributed on our website are completely virus-free and available for download at no cost.

We would love to hear from you

If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

  • Stunnel 5.61 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    Stunnel 5.61 Screenshot 1

What's new in this version:

New features sponsored by the University of Maryland:
- Added new "protocol = capwin" and "protocol = capwinctrl" configuration file options

New features for the Windows platform:
- Added client mode allowing authenticated users to view logs, reconfigure and terminate running stunnel services
- Added support for multiple GUI and service instances distinguised by the location of stunnel.conf
- Improved log window scrolling
- Added a new 'Pause auto-scroll' GUI checkbox
- Double click on the icon tray replaced with single click
- OpenSSL DLLs updated to version 3.0.1

Other new features:
- Rewritten the testing framework in python (thx to Peter Pentchev for inspiration and initial framework)
- Added support for missing SSL_set_options() values
- Updated stunnel.spec to support RHEL8

- OpenSSL 3.0 build
- reloading configuration with "systemctl reload stunnel.service"
- incorrect messages logged for OpenSSL errors
- printing IPv6 socket option defaults on FreeBSD