Re:DNS servers that offer privacy and filtering
by skrause on Wednesday February 06, 2019 @07:29AM
(#19094576)
I like to share the cache of the DNS resolver with as many people as possible because that's what gives you the best performance. A local resolver just for me can't really do that.
[ Parent
| on HN ]
Re:DNS servers that offer privacy and filtering
by ingenium on Wednesday February 06, 2019 @12:52PM
(#19097631)
Google DNS (and likely others) doesn't really work that well for this unless it's a very popular domain because of the sheer number of servers that they run and the short TTLs on most records. Even on subsequent lookups, you're likely to hit a different backend server that doesn't have a record cached that you just looked up. Google's servers don't seem to share their cache between one another. Even reddit.com often has to do the full lookup.
For a full local resolver, you can configure it to use and serve expired records, with a 0 TTL. In the background it will then lookup all records used, so that it's refreshed for next time. Cloudflare does this. Likewise, you can configure it to prefetch frequently requested records before they expire.