淘寶dns解析錯誤致使首頁打不開

時間 2019-12-14

原文原文鏈接

今天下午3點左右吧, 打開淘寶首頁的時候被轉到一個錯誤頁面, 說我訪問的頁面不存在.web

看被轉過去的頁面域名仍是err.taobao.com, 因此應該仍是淘寶內部的"正常"的跳轉, 不是病毒啊什麼的.緩存

開tcpdump抓包看一下. 和淘寶有關的記錄以下:服務器

192.168.0.110.50874 > 101.226.178.141.80: Flags [.], cksum 0x193e (correct), seq 3469495610:3469497050, ack 3942073739, win 4096, options [nop,nop,TS val 479275520 ecr 780673144], length 1440
    D...U\T&..n...E...i.@.@......ne......P..M:..E......>.....
    ..*... xGET / HTTP/1.1
    Host: www.taobao.com
    Connection: keep-alive
    Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
    User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.89 Safari/537.36
    Accept-Encoding: gzip, deflate, sdch
    Accept-Language: zh-CN,zh;q=0.8,en;q=0.6

    ...

    101.226.178.141.80 > 192.168.0.110.50874: Flags [P.], cksum 0x4485 (correct), seq 1:450, ack 1590, win 126, options [nop,nop,TS val 780733766 ecr 479275520], length 449
    T&..n.D...U\..E.....@.8...e......n.P....E...Sp...~D......
    F..*.HTTP/1.1 302 Found
    Server: Tengine
    Date: Sat, 14 Mar 2015 07:25:11 GMT
    Content-Type: text/html
    Content-Length: 258
    Connection: keep-alive
    Location: http://err.taobao.com/error1.html

    <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
    <html>
    <head><title>302 Found</title></head>
    <body bgcolor="white">
    <h1>302 Found</h1>
    <p>The requested resource resides temporarily under a different URI.</p>
    <hr/>Powered by Tengine</body>
    </html>

總的來講就是我淘寶www.taobao.com, 域名被解析到101.226.178.141這個IP,而後個人請求被轉到了http://err.taobao.com/error1.html這個頁面.網絡

看一下dns:app

% nslookup www.taobao.com                                             127 ↵ ✭
Server:192.168.0.1
Address:192.168.0.1#53

Non-authori         tative answer:
Name:www.taobao.com
Address: 222.73.134.41
Name:www.ta     obao.com
Address: 101.226.178.151
Name:www.taobao.com
Address: 222.73.    134.51
Name:www.taobao.com
Address: 101.226.178.141

在 /etc/hosts裏添加一行 222.73.134.41 www.taobao.com 指向另一個IP試一下, 訪問正常了. 而後再手工換成101.226.178.141, 仍是被轉到錯誤頁, 看來101.226.178.141這個IP是有問題.tcp

網上搜索了一下, 101.226.178.141 這個IP是天貓的. 本地看一下:ide

% host www.tmall.com
www.tmall.com is an alias for www.gslb.taobao.com.danuoyi.tbcache.com.
www.gslb.taobao.com.danuoyi.tbcache.com has address 101.226.178.111
www.gslb.taobao.com.danuoyi.tbcache.com has address 101.226.178.141
www.gslb.taobao.com.danuoyi.tbcache.com has address 101.226.178.151
www.gslb.taobao.com.danuoyi.tbcache.com has address 101.226.181.111
www.gslb.taobao.com.danuoyi.tbcache.com has address 222.73.134.41
www.gslb.taobao.com.danuoyi.tbcache.com has address 222.73.134.51
www.gslb.taobao.com.danuoyi.tbcache.com has address 101.226.181.101
www.gslb.taobao.com.danuoyi.tbcache.com has address 101.226.178.101

因此說, 多是淘寶DNS管理人員不當心把www.taobao.com的一條IP不當心轉到天貓去了. 而後還被電信等dns服務器緩存了起來.spa

更新: 這其實已是昨天發生事情了. 但如今看到的dns好像還不對,有可能仍是電信的緩存?? 這麼久?code

到http://tool.chinaz.com/dns 查看了一下, 上海電信的www.taobao.com的dns地址已經沒有101.226.178.141了

上海[電信]
101.226.178.151 [上海市 浙江淘寶網絡有      限公司電信節點]
101.226.181.101 [上海市 浙江淘寶網絡有限公司電信節點]
101.226.178.141 [上海市 浙江淘寶網絡有限公司電信節點]
101.226.181.111 [上海市 浙江淘寶網絡有限公司電信節點]

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