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@malaohu 忘记补充原理了,能够访问到这个目录的前提是网站使用了cloudflare的cdn。倒着推,只要能确定网站用了cloudflare的cdn,就能够通过这个目录获取到ip
其实没那么麻烦,谷歌语法搜索inurl:"/cdn-cgi/trace"就可以找到一堆这样类似的接口