DNS TTLs revisited

[Kevin Darcy]

Robert Gahl wrote:

>My company is the holder of the domain netflame.cc
>
>While the TTL on the domain has been set to 24 hours, we have set an 
>individual TTL on one particular machine (ssl-hints.netflame.cc) to 30 seconds.
>
>My question is this:
>
>Does this play well across all DNS? I haven't done this until 9.x, so I 
>don't know about version 8 or, for that matter, version 4. Is there a 
>version out there where they only take the domain value (1 day) rather than 
>the individual value (30 sec)?
>
Within the context of zonefile parsing, an explicit TTL always overrides 
any "implicit" TTL, such as whatever is specified in the $TTL directive, 
or the SOA MINTTL value (where applicable).

- Kevin