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Free software TLS/SSL tunneling implementation
stunnel
Developer(s)
Michał Trojnara
Initial release
11 February 1998; 26 years ago (1998-02-11)[1]
Stable release
5.72[2]
/ 4 February 2024; 3 months ago (4 February 2024)
Repository
www.stunnel.org/downloads.html
Written in
C[3]
Operating system
Multi-platform
Type
Proxy, Encryption
License
GNU General Public License
Website
www.stunnel.org
Stunnel is an open-source multi-platform application used to provide a universal TLS/SSL tunneling service.
Stunnel is used to provide secure encrypted connections for clients or servers that do not speak TLS or SSL natively.[4] It runs on a variety of operating systems,[5] including most Unix-like operating systems and Windows. Stunnel relies on the OpenSSL library to implement the underlying TLS or SSL protocol.
Stunnel uses public-key cryptography with X.509 digital certificates to secure the SSL connection, and clients can optionally be authenticated via a certificate.[6]
If linked against libwrap, it can be configured to act as a proxy–firewall service as well.[citation needed]
Stunnel is maintained by Polish programmer Michał Trojnara and released under the terms of the GNU General Public License (GPL) with OpenSSL exception.[7]
^"stunnel change log". stunnel.org. Retrieved 2 March 2024.
^"stunnel change log". Retrieved 2 March 2024.
^Trojnara, Michał. "stunnel sources". GitHub. Retrieved 12 May 2020.
^O'Donovan, Barry (October 2004). "Secure Communication with Stunnel". Linux Gazette, Issue 107.
^""stunnel: Ports"". Archived from the original on 1 April 2019. Retrieved 24 August 2020.
^"stunnel(8) manual"
^"stunnel license (see COPYRIGHT.md for detailed GPL conditions)". stunnel.org. Retrieved 2 March 2024.
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functions, and a cryptographically secure pseudo-random number generator. Stunnel Application delivery controller Hardware security module Stewart, J. Michael;...
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stable and has been used for months without a restart". It can be used with Stunnel to provide https (SSL/TLS). Web server FTP/HTTP File Server "HFS ~ HTTP...
VPN, an open-source VPN server program which supports OpenVPN protocol stunnel encrypt any TCP connection (single port service) over SSL UDP hole punching...
the USENIX Security Best Paper award. As a result of this work, OpenSSL, stunnel, and others now implement defenses such as RSA blinding. His work on Rootkit...
been caught in the crossfire between two gunmen in a car park outside Stunnel House in John Williams Close. The two gunmen in question were seventeen-year-old...
the Indianapolis 1994 Seppelt and his South Australian team-mate Andrew Stunnel rowed in a lightweight coxless four with Bruce Hick and Gary Lynagh. Seppelt...
split the function of IMAP and SSL over two separate servers: stunnel and uw-imap. Stunnel proved to be quite sophisticated in the SSL configuration and...
Global Information
/ 4 February 2024