Stunnel 5.42

Reviewed by Gabriel Cojocaru on 5 Feb 2014 - Version tested: 4.54

"Designed to work as an SSL encryption wrapper"

If you want to encrypt your transmissions to make sure no one intercepts your communications, you can use Stunnel to create a SSL (Secure Sockets Layer) encryption wrapper when you connect to a remote client or server.

Here’s what you need to know about Stunnel:

  • It’s commonly used to add the SSL protocol to daemons like IMAP, POP3, POP2 in order to secure email communication without adding any additional code in the existing programs
  • It can be used with any inetd daemons, not only those responsible for emails
  • Relies on OpenSSL and SSleay libraries, so it can use any algorithm included for encryption
  • It can be used in multi-threading environments (support for Fork, Pthread and Ucontext)
  • In order to minimize the load, it can share it between multiple servers
  • Compresses the packets for faster transfers
  • Support for IP version 6 (and earlier)

Download Stunnel if you want to easily encrypt communications without making any changes to the code of the programs you already have installed.

  • Size

    3.13 MB
  • License

    Freeware
  • OS

    Windows
  • Updated

    18 Jul 2017
  • Downloads

    3,595 (14 last week)

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Antivirus information

Download3K has downloaded and tested Stunnel on 18 Jul 2017 with some of Today's best antivirus engines and you can find below, for your convenience, the scan results:
  • Avast:

    Clean
  • Avira:

    Clean
  • Kaspersky:

    Clean
  • McAfee:

    Clean
  • NOD32:

    Clean
Stunnel Antivirus Report

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