常见 CDN 的 cname 库，配合 https://github.com/zu1k/nali 使用。
nslookup 默认效果
nslookup www.baidu.com 114.114.114.114
Server: 114.114.114.114
Address: 114.114.114.114#53
Non-authoritative answer:
www.baidu.com canonical name = www.a.shifen.com.
Name: www.a.shifen.com
Address: 220.181.38.150
Name: www.a.shifen.com
Address: 220.181.38.149叠加 nali 后效果
nslookup www.baidu.com 114.114.114.114 | nali
Server: 114.114.114.114 [114DNS.COM 114DNS.COM]
Address: 114.114.114.114 [114DNS.COM 114DNS.COM] #53
Non-authoritative answer:
www.baidu.com canonical name = www.a.shifen.com [百度旗下业务地域负载均衡系统] .
Name: www.a.shifen.com [百度旗下业务地域负载均衡系统]
Address: 220.181.38.149 [中国 北京 北京]
Name: www.a.shifen.com [百度旗下业务地域负载均衡系统]
Address: 220.181.38.150 [中国 北京 北京]