certbot/README.rst
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About the Let's Encrypt Client
==============================
|build-status| |coverage| |docs|
In short: getting and installing SSL/TLS certificates made easy (`watch demo video`_).
The Let's Encrypt Client is a tool to automatically receive and install
X.509 certificates to enable TLS on servers. The client will
interoperate with the Let's Encrypt CA which will be issuing browser-trusted
certificates for free beginning the summer of 2015.
It's all automated:
* The tool will prove domain control to the CA and submit a CSR (Certificate
Signing Request).
* If domain control has been proven, a certificate will get issued and the tool
will automatically install it.
All you need to do is::
user@www:~$ sudo letsencrypt -d www.example.org auth
and if you have a compatible web server (Apache or Nginx), Let's Encrypt can
not only get a new certificate, but also deploy it and configure your
server automatically!::
user@www:~$ sudo letsencrypt -d www.example.org run
**Encrypt ALL the things!**
.. |build-status| image:: https://travis-ci.org/letsencrypt/lets-encrypt-preview.svg?branch=master
:target: https://travis-ci.org/letsencrypt/lets-encrypt-preview
:alt: Travis CI status
.. |coverage| image:: https://coveralls.io/repos/letsencrypt/lets-encrypt-preview/badge.svg?branch=master
:target: https://coveralls.io/r/letsencrypt/lets-encrypt-preview
:alt: Coverage status
.. |docs| image:: https://readthedocs.org/projects/letsencrypt/badge/
:target: https://readthedocs.org/projects/letsencrypt/
:alt: Documentation status
.. _watch demo video: https://www.youtube.com/watch?v=Gas_sSB-5SU
Disclaimer
----------
This is a **DEVELOPER PREVIEW** intended for developers and testers only.
**DO NOT RUN THIS CODE ON A PRODUCTION SERVER. IT WILL INSTALL CERTIFICATES
SIGNED BY A TEST CA, AND WILL CAUSE CERT WARNINGS FOR USERS.**
Current Features
----------------
* web servers supported:
- apache/2.x (tested and working on Ubuntu Linux)
- nginx/0.8.48+ (tested and mostly working on Ubuntu Linux)
- standalone (runs its own webserver to prove you control the domain)
* the private key is generated locally on your system
* can talk to the Let's Encrypt (demo) CA or optionally to other ACME
compliant services
* can get domain-validated (DV) certificates
* can revoke certificates
* adjustable RSA key bitlength (2048 (default), 4096, ...)
* optionally can install a http->https redirect, so your site effectively
runs https only (Apache only)
* fully automated
* configuration changes are logged and can be reverted using the CLI
* text and ncurses UI
* Free and Open Source Software, made with Python.
Links
-----
Documentation: https://letsencrypt.readthedocs.org/
Software project: https://github.com/letsencrypt/lets-encrypt-preview
Notes for developers: CONTRIBUTING.md_
Main Website: https://letsencrypt.org/
IRC Channel: #letsencrypt on `Freenode`_
Mailing list: `client-dev`_ (to subscribe without a Google account, send an
email to client-dev+subscribe@letsencrypt.org)
.. _Freenode: https://freenode.net
.. _client-dev: https://groups.google.com/a/letsencrypt.org/forum/#!forum/client-dev
.. _CONTRIBUTING.md: https://github.com/letsencrypt/lets-encrypt-preview/blob/master/CONTRIBUTING.md