Stunnel 5.60 freeware

Stunnel is a program that allows you to encrypt arbitrary TCP connections inside SSL (Secure Sockets Layer) available on both Unix and Windows. Stunnel can allow you to secure non-SSL aware daemons and protocols (like POP, IMAP, LDAP, etc) by having Stunnel provide the encryption, requiring no changes to the daemon's code.

Author Michał Trojnara
Released 2021-08-16
Filesize 2.00 MB
Downloads 1484
OS Windows 7 x64, Windows 8 x64, Windows 10 x64
Installation Instal And Uninstall
Keywords SSL encryption wrapper, remote server, remote client, logger, network, wrapper
Users' rating
(10 rating)
Stunnel - Freeware Download Notice

Stunnel Free Download - we do not host any Stunnel torrent files or links of Stunnel on,, etc. All Stunnel download links are direct Stunnel download from publisher site or their selected mirrors.

Stunnel freeware - The Latest User Reviews
Stunnel freeware - The Latest Versions History
5.60 Aug 16, 2021 New Release
5.59 Apr 5, 2021 New Release Security bugfixes:
OpenSSL DLLs updated to version 1.1.1k.
New features:
Client-side "protocol = ldap" support (thx to Bart Dopheide and Seth Grover).
The test suite fixed not to require external connectivity.
Fixed paths in generated manuals (thx to Tatsuki Makino).
Fixed configuration reload when compression is used.
Fixed compilation with early releases of OpenSSL 1.1.1.
5.58 Feb 20, 2021 New Release Security bugfixes:
The "redirect" option was fixed to properly handle unauthenticated requests (thx to Martin Stein).
Fixed a double free with OpenSSL older than 1.1.0 (thx to Petr Strukov).
OpenSSL DLLs updated to version 1.1.1j.
New features:
New 'protocolHeader' service-level option to insert custom 'connect' protocol negotiation headers. This feature can be used to impersonate other software (e.g. web browsers).
'protocolHost' can also be used to control the client SMTP protocol negotiation HELO/EHLO value.
Initial FIPS 3.0 support.
X.509v3 extensions required by modern versions of OpenSSL are added to generated self-signed test certificates.
Fixed a tiny memory leak in configuration file reload error handling (thx to Richard Könning).
Merged Debian 05-typos.patch (thx to Peter Pentchev).
Merged with minor changes Debian 06-hup-separate.patch (thx to Peter Pentchev).
Merged Debian 07-imap-capabilities.patch (thx to Ansgar).

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