How to configure to cache public domain long time


We have DNS server Internal and recursive for public domain , but when when show cache dns i see seem it only cache about 5 minus. How to can all public domain cache than 1 hour



1 Reply
best response confirmed by thanhtien19 (Contributor)
It's the TTL of the record in the public DNS, how the record is registered there is important. The record seems to have a TTL of 5 minutes, you can cache all you want... But it the public record has a TTL of 5 minutes and it changes, then it would be nice if you received that updated record instead of trying to keep on to a possibly outdated record ;)