On Feb 14, 2012, at 11:23 AM, Chuck Swiger wrote: On Feb 14, 2012, at 11:11 AM, Alan Clegg wrote: >> On 2/14/2012 1:42 PM, Chuck Swiger wrote: >> >>> ISC's BIND has (or had) a MINTTL value of 5 minutes / 300 seconds. >>> It's probably unreasonable to expect other platforms to refetch DNS >>> records faster than that. >> >> Uh... no. BIND has always respected TTL when caching information. > > See http://www.ietf.org/rfc/rfc1035.txt > > "The MINIMUM value in the SOA should be used to set a floor on the TTL of > data distributed from a zone.
The original question is from the standpoint of the recursive server, not the authoritative server. Yes, BIND 4 imposed a minimum value, but only on authoritative data. Not on cached data. BIND has (or perhaps had) the ability to impose a minimum TTL on cached data, but most implementations do not enable this. As I recall, the value has to be set in the source code before compiling the binary. Regards, Chris Buxton BlueCat Networks _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
