Mac Client For Letsencrypt

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Let’s Encrypt uses the ACME protocol to verify that you control a given domain name and to issue you a certificate. To get a Let’s Encrypt certificate, you’ll need to choose a piece of ACME client software to use. The ACME clients below are offered by third parties. Let’s Encrypt does not.

Certbot is part of EFF’s effort to encrypt the entire Internet. Secure communication over the Web relies on HTTPS, which requires the use of a digital certificate that lets browsers verify the identity of web servers (e.g., is that really google.com?). Web servers obtain their certificates from trusted third parties called certificate authorities (CAs). Certbot is an easy-to-use client that fetches a certificate from Let’s Encrypt—an open certificate authority launched by the EFF, Mozilla, and others—and deploys it to a web server.

Anyone who has gone through the trouble of setting up a secure website knows what a hassle getting and maintaining a certificate is. Certbot and Let’s Encrypt can automate away the pain and let you turn on and manage HTTPS with simple commands. Using Certbot and Let's Encrypt is free, so there’s no need to arrange payment.

How you use Certbot depends on the configuration of your web server. The best way to get started is to use our interactive guide. It generates instructions based on your configuration settings. In most cases, you’ll need root or administrator access to your web server to run Certbot.

Certbot is meant to be run directly on your web server, not on your personal computer. If you’re using a hosted service and don’t have direct access to your web server, you might not be able to use Certbot. Check with your hosting provider for documentation about uploading certificates or using certificates issued by Let’s Encrypt.

Certbot is a fully-featured, extensible client for the Let'sEncrypt CA (or any other CA that speaks the ACMEprotocol) that can automate the tasks of obtaining certificates andconfiguring webservers to use them. This client runs on Unix-based operatingsystems.

To see the changes made to Certbot between versions please refer to ourchangelog.

Until May 2016, Certbot was named simply letsencrypt or letsencrypt-auto,depending on install method. Instructions on the Internet, and some pieces of thesoftware, may still refer to this older name.

Contributing

If you'd like to contribute to this project please read Developer Guide.

This project is governed by EFF's Public Projects Code of Conduct.

How to run the client

The easiest way to install and run Certbot is by visiting certbot.eff.org,where you can find the correct instructions for many web server and OScombinations. For more information, see Get Certbot.

Understanding the client in more depth

Mac

To understand what the client is doing in detail, it's important tounderstand the way it uses plugins. Please see the explanation ofplugins inthe User Guide.

Links

Documentation: https://certbot.eff.org/docs

Software project: https://github.com/certbot/certbot

Notes for developers: https://certbot.eff.org/docs/contributing.html

Main Website: https://certbot.eff.org

Let's Encrypt Website: https://letsencrypt.org

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Community: https://community.letsencrypt.org

ACME spec: http://ietf-wg-acme.github.io/acme/

ACME working area in github: https://github.com/ietf-wg-acme/acme

System Requirements

See https://certbot.eff.org/docs/install.html#system-requirements.

Current Features

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  • Supports multiple web servers:
    • apache/2.x
    • nginx/0.8.48+
    • webroot (adds files to webroot directories in order to prove control ofdomains and obtain certs)
    • standalone (runs its own simple webserver to prove you control a domain)
    • other server software via third party plugins
  • The private key is generated locally on your system.
  • Can talk to the Let's Encrypt CA or optionally to other ACMEcompliant services.
  • Can get domain-validated (DV) certificates.
  • Can revoke certificates.
  • Adjustable RSA key bit-length (2048 (default), 4096, ...).
  • Can optionally install a http -> https redirect, so your site effectivelyruns https only (Apache only)
  • Fully automated.
  • Configuration changes are logged and can be reverted.
  • Supports an interactive text UI, or can be driven entirely from thecommand line.
  • Free and Open Source Software, made with Python.

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For extensive documentation on using and contributing to Certbot, go to https://certbot.eff.org/docs. If you would like to contribute to the project or run the latest code from git, you should read our developer guide.