• 关于SSLforFree

 之前也有文章已经提到过这家，提供网页免费申请SSL证书，无需拥有VPS服务器，提供的也是Let’s Encrypt的证书。值得一提的是，看到消息说已经支持签发通配符了。这就方便那些使用虚拟主机的朋友了。

• 申请地址

https://www.sslforfree.com ;

SSLforFree官方说明：

1.Free Wildcard Certificates

Wildcard certificates allow you to secure a domain and any subdomains under that domain. If you wanted to secure any subdomains of example.org that you have now or in the future you can make a wildcard certificate. To generate wildcard certificates add an asterisk to the beginning of the domain(s) followed by a period. Wildcard domains do not secure the root domain so you must re-enter the root domain if you want it also secured under one certificate. For example to create a wildcard domain for example.org enter .example.org example.org. To create a wildcard certificate for multiple domains such as example.org and example.com enter .example.org example.org .example.com example.com. Manual DNS verification will be required.

2.Multiple Domains or Subdomains or Wildcards

Multiple domains or subdomains are allowed and should be separated by spaces (e.g. "subdomain.domain.com domain.com otherdomain.org .wildcarddomain.com"). If the multiple domains or subdomains pertain to multiple directories then you must use manual HTTP verification and upload verification files to the correct directories or use DNS verification.

3.Prevent WWW from being Added

We automatically add the www version of the domain if not already added as most users want that implicitly. To remove the www just submit the domains you want to verify then on the verification page near the top click on "Add / Edit Domains" and remove it and submit again.

• 有弊有利 

1.使用这个网站申请自然是方便了没有vps操作，使用虚拟主机建站的朋友

但是在这里申请的SSL证书，需要在90天到期前，再次来申请并手动替换原有的SSL证书和私钥key文件。

2.如果你是使用vps服务器建站，并使用Acme.sh脚本工具申请，则会自动在到期前检查并重新签发替换。

• 相关文章以及参考 

1.Let’s Encrypt：免费 通配符域名证书将于 2018 年 2 月 27 日上线（附：旧版申请方法） 

2.Let’s Encrypt：免费 通配符（野卡）域名证书 申请方法

3.SSLforFree: 我已经支持通配符签发