如何判断一个 ip 是不是 cdn？

alect

2015-08-10 19:36:58 +08:00

可以发出来帮你查一查

ctftemp

2015-08-10 19:38:44 +08:00

@alect 非常感谢，但是我想要能编程实现的方法。

Andy1999

2015-08-10 19:39:52 +08:00

一般CDN都在header里面有标示

webjin

2015-08-10 19:47:54 +08:00

@Andy1999 ？？？

lshero

2015-08-10 20:00:05 +08:00

大厂的CDN一般都有AS自治域
自己拿一个IP去查AS号再去查AS号的信息呗

@Andy1999 的意思是你打开一个托管到CDN的URL比如

http://www.12306.cn/mormhweb/images/icobg_1.1.png
X-Cache:HIT from cache.51cdn.com
X-Powered-By:Servlet/2.5 JSP/2.1
X-Via:1.1 yc21:9 (Cdn Cache Server V2.0)

https://cdn.v2ex.co/avatar/a6a2/62e3/44095_large.png
etag:"55bcde3b-3147"
expires:Thu, 31 Dec 2037 23:55:55 GMT
last-modified:Sat, 01 Aug 2015 14:56:59 GMT
x-orca-accelerator:HIT from 064.mul.hkg01.hk.krill.c3edge.net

Header头里面就有CDN供应商的信息啊

kslr

2015-08-10 20:00:32 +08:00

@webjin 比如七牛 header里有一条是CDN qiniu

ctftemp

2015-08-10 20:04:51 +08:00

@lshero 关键是这个header由各厂自己定义各不相同，有的还可能没header，难以判断啊。赶脚只能自己先收集一份名单，再做判断了。

Strikeactor

2015-08-10 20:09:19 +08:00

http://dns.aizhan.com/
这边查也是个办法，大厂的CDN往往会出来一大堆域名

webjin

2015-08-10 20:10:38 +08:00

@lshero bgp

popu111

2015-08-10 20:12:19 +08:00

@lshero 接上->.he.net

Andy1999

2015-08-10 21:20:48 +08:00

<cdn>

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<item>117.34.11

Andy1999

2015-08-10 21:26:01 +08:00

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Andy1999

2015-08-10 21:27:15 +08:00

V2EX 截断了好几次楼主将就着看看吧，还有腾讯云大禹和腾讯云CDN 我暂时没收集到
以及Akamai的太大了发不上来

simodorg

2015-08-10 21:28:15 +08:00

@Andy1999 写进 gist 里面吧，这样好长 = =。

ctftemp

2015-08-11 18:41:05 +08:00

@Andy1999 太感谢了！请问你是怎么做的呢？如果可以最好在github维护一个列表，相信能服务很多人。

Andy1999

2015-08-11 21:13:11 +08:00

@ctftemp Azure开G5 zmap 扫全网IP
开80的拿出来再扫
乌云上面有
由于坑爹的Akamai IP数实在太大，没办法维护
比如Akamai 有一个段都是的貌似是23.0.0.0-23.255.255.255
这实在没办法全贴上来我尽力补齐

ctftemp

2015-08-12 08:49:15 +08:00

@Andy1999 明白了，谢谢