Change safer DNS

1. change your DNS to

    208.67.222.123
    208.67.220.123

2. turn off wifi and turn on wifi

3. clear cache

sudo resolvectl flush-caches

4. check

https://welcome.opendns.com/

https://www.internetbadguys.com

5. reference

https://www.opendns.com/setupguide/#familyshield

208.67.222.222 · 208.67.220.220