妙正灰这里主要的公共 DNS，帮助大家抵御一部分劫持、广告等恶劣行为，防止网站污染等。更新于 2016年2月底。
教程：http://dudns.baidu.com/useDoc.html | http://www.alidns.com/setup/
教程都是通用的，只要将 DNS 修改成你要使用的即可！
国内
| 提供商 | 主服务器 | 辅服务器 |
|---|---|---|
| AliDNS | 223.5.5.5 | 223.6.6.6 |
| CNNIC SDNS | 1.2.4.8 | 210.2.4.8 |
| 114 DNS | 114.114.114.114 | 114.114.115.115 |
| 中科大DNS（一） | 202.38.64.1 | 202.112.20.131 |
| 中科大DNS（二） | 202.141.160.95 | 202.141.160.99 |
| 中科大DNS（三） | 202.141.176.95 | 202.141.176.99 |
| oneDNS | 112.124.47.27 | 114.215.126.16 |
| DNSpai | 101.226.4.6 | 218.30.118.6 |
| V2ex （有苹果加速） | 199.91.73.222 | 178.79.131.110 |
| Baidu DuDNS | 180.76.76.76 | |
| CloudXNS/世纪互联 | 124.251.124.251 | |
| DNSPOD + | 119.29.29.29 |
国外
| 提供商 | 主服务器 | 辅服务器 |
|---|---|---|
| Level3 | 209.244.0.3 | 209.244.0.4 |
| 8.8.8.8 | 8.8.4.4 | |
| DNS.WATCH | 84.200.69.80 | 84.200.70.40 |
| Comodo Secure DNS | 8.26.56.26 | 8.20.247.20 |
| OpenDNS Home | 208.67.222.222 | 208.67.220.220 |
| DNS Advantage | 156.154.70.1 | 156.154.71.1 |
| Norton ConnectSafe | 199.85.126.10 | 199.85.127.10 |
| GreenTeamDNS | 81.218.119.11 | 209.88.198.133 |
| SafeDNS | 195.46.39.39 | 195.46.39.40 |
| OpenNIC | 107.150.40.234 | 50.116.23.211 |
| SmartViper | 208.76.50.50 | 208.76.51.51 |
| Dyn | 216.146.35.35 | 216.146.36.36 |
| FreeDNS | 37.235.1.174 | 37.235.1.177 |
| censurfridns.dk | 89.233.43.71 | 91.239.100.100 |
| Hurricane Electric | 74.82.42.42 | |
| puntCAT | 109.69.8.51 |
