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> I don't know how NOTIFY works. How does a primary machine NOTIFY
> secondaries? From what I know from setting them up, the primaries don't
> push, they respond to requests.
the way i understand it is when the primary sees that a zone's serial has
updated (or if the server was restarted, or whatever), it will send a dns
notify to the nameservers listed as ns records in the zone. the slaves
will then accept the notify, and should in turn then request an axfr (i
think?) from the master as set in the slave's named.conf (assuming bind8).
slaves never send notify requests to the masters. the slaves will request
an axfr from the masters when the slave data has expired (in the zone soa
record) and someone makes a request against the slave for that zone.
i could be wrong, but that's my understanding of it and seems to make
sense. the notify features were new in a bind 8 version. i'm not even
sure if that's in an rfc. it probably is somewhere.
-tcl.
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