Havard Eidnes via bind-users <bind-users@lists.isc.org> wrote: > > Looking at the code in BIND 9.14.10 (BIND 9.16.2 doesn't appear to be > significantly different in this regard), there appears to be a "cache > of bad records" implemented by lib/dns/badcache.c. There are two > invocations of dns_resolver_addbadcache() in lib/dns/resolver.c, with > fairly complicated preconditions to reach each of those two points.
I've had a very quick look at the code, and it looks to me like one case is due to lack of authoritative server IP addresses, and one is due to validation failure. I think you could work out whether it is the first case by dumping the cache and looking for relevant adb entries for the zone's nameservers. (But you might have to do so within the 10 minute lame TTL.) Tony. -- f.anthony.n.finch <d...@dotat.at> http://dotat.at/ Shetland Isles: Northeast 3 to 5, becoming variable 3 or less. Slight or moderate. Fair. Good. _______________________________________________ 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
