SOA minimum vs negative ttl
I believe that RFC 2308 redefines the SOA minimum field to be negative ttl If I create a dynamically updated zone file that looks like so: [begin] $ORIGIN . $TTL 500 new.com IN SOA d62.test.com. hostmaster.d62.test.com. 2013012301 10800 3600 604800 86400 new.com IN NS d62.test.com. [end] When a DNS update comes into to add or modify a record and bind eventually re-writes the master file it will rearrange the SOA and add comments (which is fine) but it labels the last field as minimum [begin] $ORIGIN . $TTL 500; 8 minutes 20 seconds new.com IN SOA d62.test.com. hostmaster.d62.test.com. ( 2013012302 ; serial 10800 ; refresh (3 hours) 3600 ; retry (1 hour) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS d62.test.com. $ORIGIN new.com. a A 1.2.3.4 [end] Is there a reason for this or is it just a hold over? It is perpetrating a misconception that this is the minimum TTL. Thanks -- Jack Tavares ___ 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
Re: SOA minimum vs negative ttl
On Thu, Jan 24, 2013 at 01:05:33AM +, Jack Tavares wrote: When a DNS update comes into to add or modify a record and bind eventually re-writes the master file it will rearrange the SOA and add comments (which is fine) but it labels [...] Is there a reason for this or is it just a hold over? Some of both, I think. RFC 2308 changed the semantics of the field, but not its name; it's still called SOA minimum even though it represents something else, and it's referenced that way in subsequent RFCs such as 4034. Also, IMHO, there's a pretty good chance that if we changed the comment from minimum to ncache ttl, it'll turn out someone had a script that depended on the existing format. I don't mind breaking people's scripts if there's a compelling reason, but I'm not sure the benefit here is all that significant, so inertia wins this round. :) -- Evan Hunt -- e...@isc.org Internet Systems Consortium, Inc. ___ 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
