2011/6/19 Michael Sinatra <mich...@rancid.berkeley.edu>: > On 06/18/11 15:23, Chris Thompson wrote: >> > >> Of course, at the root zone level, *all* NS records need either >> "required glue" or "sibling glue", because every single one of them >> is somewhere under the root zone. At least, until the aliens contact >> us and we get the Internet spliced into the Galactinet ..
So, every nameserver's hostname with their IP addresses must exist in root zone (the ".") ? >> >> Also, the "required glue" + "sibling glue" desideratum is not always >> enough. Consider >> >> foo.com. NS ns1.bar.net. >> foo.com. NS ns2.bar.net. >> >> and >> >> bar.net. NS ns1.foo.com. >> bar.net. NS ns2.foo.com. >> >> Neither seems to to need glue in either "com" or "net", but without >> either the domains cannot be resolved. This was a significant issue >> when VeriSign changed the way the *.gltd-servers.net responded last >> year. > > That's a good example (dare I say the canonical one?). I was thinking of > even simpler cases, such as where you are at least a layer below SLD. > Consider: > > baz.org. NS ns1.dns.podunk.edu. > baz.org. NS ns2.dns.podunk.edu. > > and > > dns.podunk.edu. NS ns1.dns.podunk.edu. > dns.podunk.edu. NS ns2.dns.podunk.edu. > > In theory, you "should" only need glue in podunk.edu, but podunk.edu isn't > under the control of any registry (or registrar for that matter). If the > registrar for baz.org wants to be sure that things are going to work--and > that they will stay working--then you need appropriate glue at a higher > level. > > Because registrars (and even registries) can't always control the immediate > parent of the NS, they require registration of the nameserver to allow for > glue to be placed at higher levels. > The answer above is excellent, thanks. And, is there a way to know how my nameservers are registered in any level of zone? Jorg. _______________________________________________ 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
