很多站长使用的是宝塔面板建的站，而且还开通了Nginx防火墙，再接入百度云加速的话，宝塔Nginx防火墙会拦截掉百度的IP，导致出现502错误****访问。
这个时候我们就需要进入宝塔面板把百度云加速的IP段加白，具体进入宝塔Nginx防火墙设置，全局设置，找到IP白名单设置
导入后即可正常访问。
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]