> For the complete documentation index, see [llms.txt](https://book.linh.eu.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.linh.eu.org/jian-zhan-ji-shu/gen-yu-ming-wu-fa-tian-jia-cname-ji-lu-de-jie-jue-ban-fa.md).

# 根域名无法添加CNAME记录的解决办法

根据rfc1912和rfc2181国际标准，根域名无法CNAME。

解决方法：用ALIAS记录替代CNAME记录，实现和CNAME记录同样的功能，并且与MX记录毫无冲突。

支持ALIAS记录的DNS有很多，不过，部分DNS对免费用户有一定限制（如域名数量的高度限制、记录数量的严格限制），我将这部分DNS排除在外，推荐几个DNS。

HE：<https://dns.he.net>

强烈推荐，稳定性比CloudFlare高，唯一可以真正达到100%在线，速度极快，由拥有全球最大ipv4+ipv6网络的公司提供服务。暂不支持DNSSEC。

CloudFlare：<https://www.cloudflare.com>

推荐，支持DNSSEC，可以不开启CDN，点击黄色小云朵，变成灰色，显示DNS only即可。

Namecheap：<https://www.namecheap.com>

域名不在NameCheap注册，也可以使用他们的DNS服务。

接入这些DNS后，用ALIAS记录添加相应的地址即可。主机商或者CDN提供商让你CNAME解析的地址，你用ALIAS记录添加即可！

注意：在CloudFlare中，并不是直接添加ALIAS记录，而是添加CNAME记录后，由CloudFlare自动转换成ALIAS记录。


---

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