if you run these as authoritative- only (recursion disabled) then they will never fetch any data from anywhere. (the root name servers are configured this way, for example.) the downside is that you can't list such nameservers in your "resolv.conf" files or PC equivilents (Control Panel\\Networking\\TCP IP Settings, or some such rot.) this means you need more name servers if you separate recursive from non- recursive.
Correct me if I'm wrong, but this implies that nameservers whose sole purpose is to act as primary and secondary for customer domains can run with recursion disabled. I.e. all those nameservers whose identity is readily discernable from public databases such as the Internic, RIPE, etc., could run in this configuration as long as they are not also intended to do lookups for local machines on your local network. ******************************************************** Michael Dillon voice: +1-415-482-2840 Senior Systems Architect fax: +1-415-482-2844 PRIORI NETWORKS, INC. http://www.priori.net "The People You Know. The People You Trust." ********************************************************