From Fedora Project Wiki
< Networking | NameResolution
Client operations
Client software requires at least A and AAAA queries for dual-stack operation. Name resolution libraries have different options to handle that.
Name resolution results order
- When IPv4 and IPv6 is available, IPv6 is preferred by default.
- When one of the protocols is known to be unavailable, IP
Example: Name server configuration (bind)
named.conf:
include "/etc/named/zones.test.master";
zones.test.master:
zone "example.net" { type master; file "/etc/named/master/example.net"; };
master/example.net:
$TTL 10m @ SOA router hostmaster 2012121400 1d 15m 4w 10m ; nameserver e-mail serial refresh retry expire negative-ttl @ NS router router A 10.0.17.1 AAAA 2001:15c0:6753:17::1 station A 10.0.17.2 AAAA 2001:15c0:6753:17:5054:abff:fe17:222 www CNAME station