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dn1095239
V2EX  ›  宽带症候群

为什么无法从大陆 DNS 获取到 swcdn.apple.com 大陆地区的 CDN 地址?

  •  
  •   dn1095239 · 86 天前 · 1995 次点击
    这是一个创建于 86 天前的主题,其中的信息可能已经有所发展或是发生改变。

    请教一下,我在本机上查询 swcdn.apple.com ,无论是国内还是国外的 DNS 都返回 akamai 的美国地址,导致下载速度奇慢:

    $ nslookup swcdn.apple.com
    Server:		223.5.5.5
    Address:	223.5.5.5#53
    
    Non-authoritative answer:
    swcdn.apple.com	canonical name = swcdn.apple.com.akadns.net.
    swcdn.apple.com.akadns.net	canonical name = swcdn.g.aaplimg.com.
    swcdn.g.aaplimg.com	canonical name = swcdn-na-lb.apple.com.akadns.net.
    swcdn-na-lb.apple.com.akadns.net	canonical name = swcdn.apple.com.edgesuite.net.
    swcdn.apple.com.edgesuite.net	canonical name = a1271.dscgi3.akamai.net.
    Name:	a1271.dscgi3.akamai.net
    Address: 184.25.123.145
    Name:	a1271.dscgi3.akamai.net
    Address: 184.25.123.152
    
    
    $ nslookup swcdn.apple.com 114.114.114.114
    Server:		114.114.114.114
    Address:	114.114.114.114#53
    
    Non-authoritative answer:
    swcdn.apple.com	canonical name = swcdn.apple.com.akadns.net.
    swcdn.apple.com.akadns.net	canonical name = swcdn.g.aaplimg.com.
    swcdn.g.aaplimg.com	canonical name = swcdn-na-lb.apple.com.akadns.net.
    swcdn-na-lb.apple.com.akadns.net	canonical name = swcdn.apple.com.edgesuite.net.
    swcdn.apple.com.edgesuite.net	canonical name = a1271.dscgi3.akamai.net.
    Name:	a1271.dscgi3.akamai.net
    Address: 184.25.123.152
    Name:	a1271.dscgi3.akamai.net
    Address: 184.25.123.145
    

    但在路由器上同一个 DNS 又能获取到大陆 CDN:

    [email protected]:~# nslookup swcdn.apple.com
    Server:		223.5.5.5
    Address:	223.5.5.5#53
    
    Name:      swcdn.apple.com
    swcdn.apple.com	canonical name = swcdn.apple.com.akadns.net
    Name:      swcdn.apple.com.akadns.net
    swcdn.apple.com.akadns.net	canonical name = swcdn-china-lb.dl-apple.com.akadns.net
    Name:      swcdn-china-lb.dl-apple.com.akadns.net
    swcdn-china-lb.dl-apple.com.akadns.net	canonical name = 8alnb0g00p9ast.mwcname.com
    Name:      8alnb0g00p9ast.mwcname.com
    Address 1: 111.124.71.242
    Address 2: 49.79.232.34
    Address 3: 124.232.174.197
    Address 4: 111.124.71.206
    Address 5: 111.124.71.244
    Address 6: 124.232.174.199
    Address 7: 180.101.30.53
    Address 8: 61.147.211.205
    Address 9: 124.232.174.198
    Address 10: 113.125.197.95
    Address 11: 124.232.174.14
    Address 12: 124.232.174.196
    Address 13: 183.134.27.20
    swcdn.apple.com	canonical name = swcdn.apple.com.akadns.net
    swcdn.apple.com.akadns.net	canonical name = swcdn-china-lb.dl-apple.com.akadns.net
    swcdn-china-lb.dl-apple.com.akadns.net	canonical name = swcdn.apple.com.w.alikunlun.com
    

    请问下这是什么原因?

    14 条回复    2021-10-29 11:20:56 +08:00
    wonderblank
        1
    wonderblank  
       86 天前
    dig trace 一下
    wonderblank
        2
    wonderblank  
       86 天前
    ;; ANSWER SECTION:
    swcdn.apple.com. 3578 IN CNAME 8alnb0g00p9ast.mwcname.com.
    8alnb0g00p9ast.mwcname.com. 3578 IN A 36.156.208.240

    64 bytes from 36.156.208.240: icmp_seq=0 ttl=51 time=13.051 ms

    这是我解析出来的结果
    dn1095239
        3
    dn1095239  
    OP
       86 天前
    ```
    $ dig @223.5.5.5 +trace swcdn.apple.com

    ; <<>> DiG 9.10.6 <<>> @223.5.5.5 +trace swcdn.apple.com
    ; (1 server found)
    ;; global options: +cmd
    . 59299 IN NS f.root-servers.net.
    . 59299 IN NS c.root-servers.net.
    . 59299 IN NS e.root-servers.net.
    . 59299 IN NS g.root-servers.net.
    . 59299 IN NS i.root-servers.net.
    . 59299 IN NS d.root-servers.net.
    . 59299 IN NS l.root-servers.net.
    . 59299 IN NS b.root-servers.net.
    . 59299 IN NS a.root-servers.net.
    . 59299 IN NS k.root-servers.net.
    . 59299 IN NS h.root-servers.net.
    . 59299 IN NS m.root-servers.net.
    . 59299 IN NS j.root-servers.net.
    . 59299 IN RRSIG NS 8 0 518400 20211108170000 20211026160000 14748 . fxvblquc0n0OVj6btUqmBH5KFX2Ez4PXT1B/2kO0nNr2F4CqbVJ1iOzB 9M0eEQGUvk/winR0O6qyq0vPpp/bDg9yEoWFnGAQK2gds98NCalUWpQz oSIwG587xwAApM5e3NpWI5HCHMSvYdF+8zKAMwyzPCssdtW4bafkb9jn D+c5co76GPI+y5/R2fF9Kl2Ll9Ka2mIt2JpW3myGhPMuYiApI7lTFGih diNZn6ssKR7rlCL6dSFHARII3fwFgBW/N6Qk4BgyMbcAdR3byhZY8IKb Fcm/QEoxkvHW3EAU2/bp3DQgWGmUekk8TYphpt5OcbU5TquB8WYBEeGY mu2eNg==
    ;; Received 525 bytes from 223.5.5.5#53(223.5.5.5) in 343 ms

    swcdn.apple.com. 14 IN CNAME swcdn.apple.com.akadns.net.
    swcdn.apple.com.akadns.net. 14 IN CNAME swcdn.g.aaplimg.com.
    swcdn.g.aaplimg.com. 14 IN CNAME swcdn-na-lb.apple.com.akadns.net.
    swcdn-na-lb.apple.com.akadns.net. 14 IN CNAME swcdn.apple.com.edgesuite.net.
    swcdn.apple.com.edgesuite.net. 14 IN CNAME a1271.dscgi3.akamai.net.
    a1271.dscgi3.akamai.net. 14 IN A 23.49.5.165
    a1271.dscgi3.akamai.net. 14 IN A 23.49.5.170
    ;; Received 246 bytes from 192.112.36.4#53(g.root-servers.net) in 196 ms
    ```

    也是返回 akamai 的
    lingaoyi
        4
    lingaoyi  
       85 天前
    17.253.85.204
    这个蛮快阿。
    datou
        5
    datou  
       85 天前
    非权威应答:
    名称: k128-swcdn.gslb.ksyuncdn.com
    Address: 27.19.253.1
    Aliases: swcdn.apple.com
    swcdn.apple.com.akadns.net
    swcdn-china-lb.dl-apple.com.akadns.net
    swcdn.apple.com.download.ks-cdn.com

    ping 27.19.253.1

    正在 Ping 27.19.253.1 具有 32 字节的数据:
    来自 27.19.253.1 的回复: 字节=32 时间=7ms TTL=57
    来自 27.19.253.1 的回复: 字节=32 时间=7ms TTL=57
    来自 27.19.253.1 的回复: 字节=32 时间=8ms TTL=57
    来自 27.19.253.1 的回复: 字节=32 时间=6ms TTL=57
    bclerdx
        6
    bclerdx  
       85 天前
    我的也解析到国内 IP 上。
    loukky
        7
    loukky  
       85 天前
    C:\Users\wangw>dig swcdn.apple.com

    ; <<>> DiG 9.17.9 <<>> swcdn.apple.com
    ;; global options: +cmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3767
    ;; flags: qr rd ra; QUERY: 1, ANSWER: 16, AUTHORITY: 0, ADDITIONAL: 1

    ;; OPT PSEUDOSECTION:
    ; EDNS: version: 0, flags:; udp: 4096
    ;; QUESTION SECTION:
    ;swcdn.apple.com. IN A

    ;; ANSWER SECTION:
    swcdn.apple.com. 2521 IN CNAME swcdn.apple.com.akadns.net.
    swcdn.apple.com.akadns.net. 91 IN CNAME swcdn.g.aaplimg.com.
    swcdn.g.aaplimg.com. 1780 IN CNAME swcdn-china-lb.dl-apple.com.akadns.net.
    swcdn-china-lb.dl-apple.com.akadns.net. 134 IN CNAME swcdn.apple.com.w.alikunlun.com.
    swcdn.apple.com.w.alikunlun.com. 55 IN A 124.165.127.199
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.242
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.244
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.238
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.248
    swcdn.apple.com.w.alikunlun.com. 55 IN A 124.165.127.206
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.243
    swcdn.apple.com.w.alikunlun.com. 55 IN A 124.165.127.205
    swcdn.apple.com.w.alikunlun.com. 55 IN A 124.165.127.200
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.240
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.241
    swcdn.apple.com.w.alikunlun.com. 55 IN A 116.177.224.239

    ;; Query time: 3 msec
    ;; SERVER: 192.168.11.1#53(192.168.11.1) (UDP)
    ;; WHEN: Thu Oct 28 01:04:02 ;; MSG SIZE rcvd: 406

    虽然不是本地,但也是国内(这个是中科大返回的)
    如果用自己搭建的 dns ,可以返回本地(因为设置了 edns )
    szpunk
        8
    szpunk  
       85 天前
    nslookup swcdn.apple.com 223.5.5.5 | nali --gbk
    非权威应答:
    服务器: public1.alidns.com
    Address: 223.5.5.5 [浙江省杭州市 阿里巴巴阿里云 AliDNS 服务器]

    名称: app.dl.ourdvs.com.cd23f.com
    Addresses: 111.45.23.239 [广东省广州市 电信 IDC 机房]
    120.240.100.43 [广东省揭阳市 移动]
    111.45.23.230 [广东省广州市 电信 IDC 机房]
    183.240.117.137 [广东省江门市 移动]
    111.45.23.227 [广东省广州市 电信 IDC 机房]
    120.232.176.57 [广东省广州市 移动]
    120.232.176.36 [广东省广州市 移动]
    120.240.100.49 [广东省揭阳市 移动]
    111.45.23.218 [广东省广州市 电信 IDC 机房]
    111.45.23.209 [广东省广州市 电信 IDC 机房]
    111.45.23.210 [广东省广州市 电信 IDC 机房]
    183.240.117.134 [广东省江门市 移动]
    Aliases: swcdn.apple.com
    swcdn.apple.com.akadns.net [Akamai CDN]
    swcdn-china-lb.dl-apple.com.akadns.net [Akamai CDN]
    8alnb0g00p9ast.mwcname.com [QUANTIL (网宿)]
    haojunmei
        9
    haojunmei  
       85 天前
    服务器: public1.alidns.com
    Address: 223.5.5.5

    非权威应答:
    名称: 8alnb0g00p9ast.mwcname.com
    Addresses: 124.232.174.19
    124.232.174.18
    111.124.71.241
    122.225.57.75
    49.71.73.143
    180.101.30.33
    116.211.79.10
    111.124.71.206
    42.243.147.17
    49.71.73.142
    124.232.174.17
    61.164.119.91
    113.142.25.165
    Aliases: swcdn.apple.com
    swcdn.apple.com.akadns.net
    swcdn-china-lb.dl-apple.com.akadns.net
    Marionic0723
        11
    Marionic0723  
       84 天前
    C:\Windows\system32>nslookup swcdn.apple.com
    服务器: UnKnown
    Address: 2408:8210:3076:3df0::1

    非权威应答:
    名称: swcdn.apple.com.w.alikunlun.com
    Addresses: 125.39.103.239
    125.39.103.248
    125.39.103.241
    125.39.103.242
    125.39.103.236
    125.39.103.240
    125.39.103.238
    125.39.103.237
    Aliases: swcdn.apple.com
    swcdn.apple.com.akadns.net
    swcdn-china-lb.dl-apple.com.akadns.net

    天津联通默认 DNS 正常
    TomChaai
        12
    TomChaai  
       84 天前
    前几天有个人也是遇到 DNS 解析绕远路的问题,后来发现是自己反广告插件带了个国外 DNS 。
    你自己排查下。
    jousca
        13
    jousca  
       84 天前
    目测是楼主自己电脑系统的问题。

    四川移动


    ping swcdn.apple.com

    正在 Ping swcdn.apple.com.w.alikunlun.com [112.45.30.241] 具有 32 字节的数据
    来自 112.45.30.241 的回复: 字节=32 时间=3ms TTL=56
    来自 112.45.30.241 的回复: 字节=32 时间=3ms TTL=56
    来自 112.45.30.241 的回复: 字节=32 时间=3ms TTL=56
    来自 112.45.30.241 的回复: 字节=32 时间=3ms TTL=56

    112.45.30.241 的 Ping 统计信息:
    数据包: 已发送 = 4 ,已接收 = 4 ,丢失 = 0 (0% 丢失),
    往返行程的估计时间(以毫秒为单位):
    最短 = 3ms ,最长 = 3ms ,平均 = 3ms
    Kinnice
        14
    Kinnice  
       84 天前
    被你路由器上的某科技插件拦截并替换了 dns 请求
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