Stunnel
Free software TLS/SSL tunneling implementation / From Wikipedia, the free encyclopedia
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Stunnel is an open-source multi-platform application used to provide a universal TLS/SSL tunneling service.
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Developer(s) | Michał Trojnara |
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Initial release | 11 February 1998; 26 years ago (1998-02-11)[1] |
Stable release | |
Repository | www |
Written in | C[3] |
Operating system | Multi-platform |
Type | Proxy, Encryption |
License | GNU General Public License |
Website | www |
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]