黑客笔记77：批量识别CDN场景

ping请求

PS C:\Users\kali\Downloads> ping www.qq.com

正在 Ping ins-r23tsuuf.ias.tencent-cloud.net [112.53.42.114] 具有 32 字节的数据:

PS C:\Users\kali\Downloads> ping www.dongguanbank.cn

正在 Ping www.dongguanbank.cn [120.197.188.214] 具有 32 字节的数据:

PS C:\Users\kali\Downloads> ping 111111111111.qq.com

Ping 请求找不到主机 111111111111.qq.com。请检查该名称，然后重试。

nslookup请求

PS C:\Users\kali\Downloads> nslookup www.qq.com 8.8.8.8
服务器:  UnKnown
Address:  8.8.8.8

非权威应答:
名称:    ins-r23tsuuf.ias.tencent-cloud.net

PS C:\Users\kali\Downloads> nslookup qdyy.dongguanbank.cn 8.8.8.8
服务器:  dns.google
Address:  8.8.8.8

非权威应答:
名称:    qdyy.dongguanbank.cn
Addresses:  2409:8754:d061:10:120:197:144:249
          120.197.144.249
          
PS C:\Users\kali\Downloads> nslookup spp.dongguanbank.cn 8.8.8.8
服务器:  dns.google
Address:  8.8.8.8

非权威应答:
名称:    spp.dongguanbank.cn
Address:  120.236.67.233

PS C:\Users\kali\Downloads> nslookup 1111111111.dongguanbank.cn 8.8.8.8
服务器:  dns.google
Address:  8.8.8.8

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
*** 请求 dns.google 超时

批量识别还是选择nslookup好一点，因为有的域名没有CDN，而且对应的解析IP是两个甚至3个。

DNS服务器指定8.8.8.8比较好，毕竟是全球服务器，各种解析都比较稳定，比114.114.114.114好是肯定的。

解析的结果要把2409:8754:d061:10:120:197:144:249此类的IPV6地址给清理掉，避免产生干扰。