dqjdda大佬：
vi /etc/resolv.conf

直接改为

  1. search host
  2. nameserver 195.46.39.39
  3. nameserver 77.88.8.7
  4. nameserver 8.8.8.8
  5. options timeout:3 attempts:3

延迟对比：

  1. [email protected]:~# ping 195.46.39.39（safedns）
  2. PING 195.46.39.39 (195.46.39.39) 56(84) bytes of data.
  3. 64 bytes from 195.46.39.39: icmp_seq=1 ttl=54 time=25.6 ms
  4. 64 bytes from 195.46.39.39: icmp_seq=2 ttl=54 time=24.5 ms
  5. 64 bytes from 195.46.39.39: icmp_seq=3 ttl=54 time=26.3 ms
  6. 64 bytes from 195.46.39.39: icmp_seq=4 ttl=54 time=24.6 ms
  1. [email protected]:~# ping 77.88.8.7 (Yandex.DNS)
  2. PING 77.88.8.7 (77.88.8.7) 56(84) bytes of data.
  3. 64 bytes from 77.88.8.7: icmp_seq=1 ttl=54 time=101 ms
  4. 64 bytes from 77.88.8.7: icmp_seq=2 ttl=54 time=101 ms
  5. 64 bytes from 77.88.8.7: icmp_seq=3 ttl=54 time=101 ms
  6. 64 bytes from 77.88.8.7: icmp_seq=4 ttl=54 time=103 ms
  1. [email protected]:~# ping 8.8.8.8（谷歌DNS）
  2. PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
  3. 64 bytes from 8.8.8.8: icmp_seq=1 ttl=101 time=113 ms
  4. 64 bytes from 8.8.8.8: icmp_seq=2 ttl=101 time=113 ms
  5. 64 bytes from 8.8.8.8: icmp_seq=3 ttl=101 time=113 ms
  6. 64 bytes from 8.8.8.8: icmp_seq=4 ttl=101 time=114 ms

大佬们可以对比测试下

WooSi大佬：
1111呢发现一个 伯力 可用的并且延迟超低的 Dns safedns