一个ACME客户端，可以获取证书和延伸地更新服务器配置（目前支持基于.deb系统上Apache，nginx的支持即将推出）。

当前特性：

• 支持多种服务器web:
  • apache/2.x (tested and working on Ubuntu Linux)
  • nginx/0.8.48+ (under development)
  • standalone (runs its own simple webserver to prove you control a domain)
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• 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 bit-length (2048 (default), 4096, ...).
• Can optionally install a http -> https redirect, so your site effectively runs https only (Apache only)
• Fully automated.
• Configuration changes are logged and can be reverted.
• Text and ncurses UI.
• Free and Open Source Software, made with Python.
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项目主页：http://www.open-open.com/lib/view/home/1445517902867