Let's Encrypt client
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.
Browser-trusted certificates will be available in the coming months.
About the Let’s Encrypt Client
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.
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 to sign a single domain is:
user@www:~$ sudo letsencrypt -d www.example.org auth
For multiple domains (SAN) use:
user@www:~$ sudo letsencrypt -d www.example.org -d 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!
- web servers supported:
- apache/2.x (tested and working on Ubuntu Linux)
- nginx/0.8.48+ (under development)
- 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.
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