1. 首先，配置正確的dns，既可以視覺化介面操作

   

   image.png

   
   也可以命令列操作：
   networksetup -setdnsservers Wi-Fi 8.8.8.8
   檢視
   networksetup -getdnsservers Wi-Fi
2. 此時再去ping域名的話，還是ping不通，但是ping ip地址卻可以
   ping www.baidu.com
ping: cannot resolve www.baidu.com: Unknown host
   檢視ip地址：
   nslookup baidu.com

Server:     8.8.8.8
Address:    8.8.8.8#53

Non-authoritative answer:
Name:   baidu.com
Address: 220.181.57.216
Name:   baidu.com
Address: 111.13.101.208
 

然後ping ip:
ping 111.13.101.208

PING 111.13.101.208 (111.13.101.208): 56 data bytes
64 bytes from 111.13.101.208: icmp_seq=0 ttl=49 time=31.815 ms
64 bytes from 111.13.101.208: icmp_seq=1 ttl=49 time=29.586 ms
64 bytes from 111.13.101.208: icmp_seq=2 ttl=49 time=32.358 ms
^C
--- 111.13.101.208 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 29.586/31.253/32.358/1.199 ms
 

3.解決辦法
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist
然後ping域名，就可以了

作者：Sunnky
連結：https://www.jianshu.com/p/267993960e83