Not sure if this is a BIND question or a standards question. I'm experimenting with some stats gathering. To get the zone of a domain name I'm making a SOA query, which will either return a positive answer (if the domain is a zone apex) or a negative answer with the enclosing zone's SOA in the authority section.
I noticed that the TTL on the SOA in NXDOMAIN replies is always zero. If I query for a different nonexistent type then the TTL is what I expect. This weirdness doesn't occur for noerror/nodata. $ dig +noall +authority soa nxdomain.dotat.at dotat.at. 0 IN SOA black.dotat.at. dot.dotat.at. 757 3600 600 604800 60 $ dig +noall +authority txt nxdomain.dotat.at dotat.at. 60 IN SOA black.dotat.at. dot.dotat.at. 757 3600 600 604800 60 $ dig +noall +authority soa www.dotat.at dotat.at. 60 IN SOA black.dotat.at. dot.dotat.at. 757 3600 600 604800 60 $ dig +noall +authority txt www.dotat.at dotat.at. 60 IN SOA black.dotat.at. dot.dotat.at. 757 3600 600 604800 60 I note that BIND and NSD behave differently: $ dig +noall +authority soa nxdomain. @f.root-servers.net. . 0 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2012060600 1800 900 604800 86400 $ dig +noall +authority soa nxdomain. @l.root-servers.net. . 86400 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2012060600 1800 900 604800 86400 Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ Lundy, Fastnet: Mainly south becoming cyclonic, 4 or 5 increasing 6 to gale 8, occasionally severe gale 9 later. Moderate becoming rough or very rough, occasionally high later in south. Rain. Moderate, occasionally poor. _______________________________________________ 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
