stunnel Free

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This program received 3 awards

Video tutorial & screenshots

  • Main window
  • System Tray Interface
  • Main Interface
  • Main window
  • Main window
This review applies to version 5.2. The latest version of this software will soon be reviewed by our informers.

Stunnel is a proxy for adding TLS encryption to existing clients and servers without any change in the programs' code. Stunnel uses the OpenSSL library for cryptography, so it supports whatever cryptographic algorithms are compiled into the library. It can benefit from the FIPS 140-2 validation of the OpenSSL FIPS Object Module, as long as the building process meets its Security Policy.
This software was checked for viruses and was found to be clean. Click here to see antivirus report.
trusted DOWNLOAD 3.1 MB

What's new in version 5.1

- Fixed a NULL pointer dereference causing the service to crash. This bug was introduced in stunnel 5.15.
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