> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/welcome/cn/content-delivery-network/domain-management/cdn-settings/configure-an-origin-server.md).
# 配置源站服务器
1. 在域名列表中点击一个域名。
2. 点击 **源配置**。您可以修改源服务器和上游端口。
**源优先级**\
\- 主源：基本源的地址是用于回源路由的源服务器的默认地址。\
\- 备源：当主源服务器无法连接时，备源服务器将被激活。
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