I'm working on transferring zones from DynDNS to Route53, any suggestion on what the TTLs (SOA and NS records) should be - during this transition period (i.e. before/when I update the registrar to point to Route53 instead of DynDNS) ?
according to https://www.rfc-editor.org/rfc/rfc6781#section-4.4.1 I see I should NOT go under 10min:
We suggest that the Minimum Zone TTL be long enough to both fetch and verify all the RRs in the trust chain. In workshop environments, it has been demonstrated [NIST-Workshop] that a low TTL (under 5 to 10 minutes) caused disruptions
I was thinking to go with something like 1hr during the transition period, and bump it up after zone transfer is done, but wanted to see if there's any recommendation for that period.
any pointer to documentation for this is greatly appreciated as well.