[Opendnssec-develop] Missing TTLs in zone files

Ray.Bellis at nominet.org.uk Ray.Bellis at nominet.org.uk
Mon Oct 19 10:34:13 UTC 2009

 > Hi Ray, 
> Where do modern implementations get their 'default TTL' value from 
> if the per record TTL and TTL directives are omitted? 

Damned good question.  RFC 2308 appears to be silent on that issue, except 
to say:

"Where a server does not require RRs to include the TTL value explicitly, 
it should provide a mechanism, ** not being the value of the MINIMUM field 
of the SOA record **, from which the missing TTL values are obtained." (my 


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