3 ms·
This already exists (NOTIFY), but it's only used for master-slave setups (ie. a bunch of DNS servers serving some authoritative zone who want changes to be tran
by diegocg 7y ago
This already exists (NOTIFY), but it's only used for master-slave setups (ie. a bunch of DNS servers serving some authoritative zone who want changes to be transmitted to all slaves ASAP)
It would be interesting to (ab)use this mechanism in the way you suggest. A recursive DNS server could ask to be NOTIFY'ed of changes in the zone they are querying...it would, of course, add load to the server, and it would need strict limits to avoid DoS, but it seems an interesting idea.
- dsp 7y agoThe big problem, to the extent there is one, is between the client and the recursive server. Not as much the recursive and the authoritative. Cost is highly amortized between recursive and authoritative for busy names.