谷歌一域名 DNS 解析分析 浅谈谷歌域名DNS

极客券购

原来的 GGC IP 也是有规律的,可惜谷歌现在不把大多数服务解析到 GGC 了,但是应该还可以用。如:beacons2.gvt2.com 这个域名,解析出了16个ip。

Frame 53280: 333 bytes on wire (2664 bits), 333 bytes captured (2664 bits) on interface 0

Ethernet II, Src: aa:bb:cc:dd:ee:fe (aa:bb:cc:dd:ee:fe), Dst: WesternE_8f:c2:55 (00:21:f5:8f:c2:55)

Internet Protocol Version 4, Src: 192.168.6.1, Dst: 192.168.6.19

User Datagram Protocol, Src Port: 53, Dst Port: 60452

Domain Name System (response)

[Request In: 53277]

[Time: 0.015842000 seconds]

Transaction ID: 0x9913

Flags: 0x8180 Standard query response, No error

Questions: 1

Answer RRs: 16

Authority RRs: 0

Additional RRs: 0

Queries

beacons2.gvt2.com: type A, class IN

Answers

beacons2.gvt2.com: type A, class IN, addr 172.217.17.35

beacons2.gvt2.com: type A, class IN, addr 216.58.212.227

beacons2.gvt2.com: type A, class IN, addr 216.58.212.131

beacons2.gvt2.com: type A, class IN, addr 172.217.17.131

beacons2.gvt2.com: type A, class IN, addr 216.58.212.195

beacons2.gvt2.com: type A, class IN, addr 216.58.211.131

beacons2.gvt2.com: type A, class IN, addr 172.217.22.163

beacons2.gvt2.com: type A, class IN, addr 216.58.212.163

beacons2.gvt2.com: type A, class IN, addr 172.217.17.99

beacons2.gvt2.com: type A, class IN, addr 172.217.18.131

beacons2.gvt2.com: type A, class IN, addr 216.58.209.131

beacons2.gvt2.com: type A, class IN, addr 216.58.193.131

beacons2.gvt2.com: type A, class IN, addr 172.217.1.131

beacons2.gvt2.com: type A, class IN, addr 216.58.201.163

beacons2.gvt2.com: type A, class IN, addr 216.58.209.99

beacons2.gvt2.com: type A, class IN, addr 172.217.17.67

更牛的是,谷歌的 IP 最后一个数是有讲究的,比如 beacons2.gvt2.com 这个域名,IP 的最后一个数是 03, 23, 43, 63, 83, a3, c3, e3

十六进制,以下用 03 表示;如果是 13, 33, 53, 73, 93, b3, d3, f3,用 13 表示

不仅 v4 如此,v6 也一样

Google 主站:x.x.x.04 (除非返回多个 IP )

YouTube:x.x.x.0e

Google 地区域名:x.x.x.03

ns[1-4].google.com:216.239.[32, 34, 36, 38].10

Google User Content:x.x.x.01

Android:x.x.x.0e

ghs.google.com:x.x.x.13

Blogger:x.x.x.09

等等...

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