子域名 SSL（通配符 SSL）
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<iframe src="https://tldfyi.com/iframe/glossary/ssl-for-subdomains/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://tldfyi.com/glossary/ssl-for-subdomains/Add a dynamic SVG badge to your README or docs.
[](https://tldfyi.com/glossary/ssl-for-subdomains/)Use the native HTML custom element.
通配符 SSL 证书使用 *.example.com 模式，用单张证书保护域名及其所有 [[subdomain|子域名]]。对于拥有大量子域名的网站，比单独购买证书更具成本效益。
示例
A wildcard certificate for *.example.com covers www.example.com, api.example.com, and any other subdomain automatically.