3 ms·
Won't this also cache a bad record for longer like NXDOMAIN which is what we're getting?
by cjsuk 9y ago
Won't this also cache a bad record for longer like NXDOMAIN which is what we're getting?
- JelteF 9y agoNo, the TTL for caching NXDOMAIN is decided by the nameservers SOA record. In this case 900 (15 minutes). The reason for this is that if there's no domain there's also no way to get it's TTL.
- cjsuk 9y agoThanks for the clarification - much appreciated!
- benmmurphy 9y agoi think negative results are cached using a different value. [https://serverfault.com/questions/426807/how-long-does-negative-dns-caching-typically-last https://serverfault.com/questions/426807/how-long-does-negat...] but last time io had a problem we continued to have downtime after it was resolved because of a high value for the SOA record :(
- cjsuk 9y agoThanks for the reply. Much appreciated.