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ctftemp
V2EX  ›  问与答

如何判断一个 ip 是不是 cdn?

  •  
  •   ctftemp · 2015-08-10 19:05:51 +08:00 · 8980 次点击
    这是一个创建于 3395 天前的主题,其中的信息可能已经有所发展或是发生改变。
    有没有各大cdn厂商的ip数据呢。
    17 条回复    2015-08-12 08:49:15 +08:00
    alect
        1
    alect  
       2015-08-10 19:36:58 +08:00
    可以发出来帮你查一查
    ctftemp
        2
    ctftemp  
    OP
       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
        3
    Andy1999  
       2015-08-10 19:39:52 +08:00 via iPhone
    一般CDN都在header里面有标示
    webjin
        4
    webjin  
       2015-08-10 19:47:54 +08:00 via Android
    @Andy1999 ???
    lshero
        5
    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
        6
    kslr  
       2015-08-10 20:00:32 +08:00 via Android
    @webjin 比如七牛 header里有一条是CDN qiniu
    ctftemp
        7
    ctftemp  
    OP
       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
        8
    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
        9
    webjin  
       2015-08-10 20:10:38 +08:00 via Android
    @lshero bgp
    popu111
        10
    popu111  
       2015-08-10 20:12:19 +08:00
    @lshero 接上->.he.net
    Andy1999
        11
    Andy1999  
       2015-08-10 21:20:48 +08:00 via iPhone
    <cdn>
    <!--加速乐 变更时会发微信-->
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    Andy1999
        12
    Andy1999  
       2015-08-10 21:26:01 +08:00 via iPhone
    <!--百度云加速 包含了即将上线的节点-->
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    Andy1999
        13
    Andy1999  
       2015-08-10 21:27:15 +08:00 via iPhone   ❤️ 1
    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
        14
    simodorg  
       2015-08-10 21:28:15 +08:00
    @Andy1999 写进 gist 里面吧,这样好长 = =。
    ctftemp
        15
    ctftemp  
    OP
       2015-08-11 18:41:05 +08:00 via Android
    @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
        16
    Andy1999  
       2015-08-11 21:13:11 +08:00 via iPhone   ❤️ 1
    @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
        17
    ctftemp  
    OP
       2015-08-12 08:49:15 +08:00
    @Andy1999 明白了,谢谢
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