All servers are caching servers as all servers maintain a cache of DNS data. A cache-only or stub server is a server that is not a master server for any zone other than the reverse loopback zone in the in-addr.arpa. domain.
A cache-only server handles queries but does not maintain any authoritative data. The cache-only server handles queries by asking the hosts that are listed in the named.ca file for the needed information.
The following is a sample configuration file for a cache-only server. Note that the class (in) has been omitted as it is the default
; ; Sample named.conf file for caching only name server ; options { directory "/var/named"; }; zone "0.0.127.in-addr.arpa" { type master; file "db.127.0.0"; }; zone "." { type hint; file "named.ca"; }; |