Bind 9 Administrator Reference Manual

Chapter 6. BIND 9 Configuration Reference
In the following example, any queries received from any of the addresses of the host itself will get
responses preferring addresses on any of the locally connected networks. Next most preferred are
addresses on the 192.168.1/24 network, and after that either the 192.168.2/24 or 192.168.3/24 network
with no preference shown between these two networks. Queries received from a host on the 192.168.1/24
network will prefer other addresses on that network to the 192.168.2/24 and 192.168.3/24 networks.
Queries received from a host on the 192.168.4/24 or the 192.168.5/24 network will only prefer other
addresses on their directly connected networks.
sortlist {
{ localhost; // IF the local host
{ localnets; // THEN first fit on the
192.168.1/24; // following nets
{ 192.168.2/24; 192.168.3/24; }; }; };
{ 192.168.1/24; // IF on class C 192.168.1
{ 192.168.1/24; // THEN use .1, or .2 or .3
{ 192.168.2/24; 192.168.3/24; }; }; };
{ 192.168.2/24; // IF on class C 192.168.2
{ 192.168.2/24; // THEN use .2, or .1 or .3
{ 192.168.1/24; 192.168.3/24; }; }; };
{ 192.168.3/24; // IF on class C 192.168.3
{ 192.168.3/24; // THEN use .3, or .1 or .2
{ 192.168.1/24; 192.168.2/24; }; }; };
{ { 192.168.4/24; 192.168.5/24; }; // if .4 or .5, pre-
fer that net
};
};
The following example will give reasonable behavior for the local host and hosts on directly connected
networks. It is similar to the behavior of the address sort in BIND 4.9.x. Responses sent to queries from
the local host will favor any of the directly connected networks. Responses sent to queries from any other
hosts on a directly connected network will prefer addresses on that same network. Responses to other
queries will not be sorted.
sortlist {
{ localhost; localnets; };
{ localnets; };
};
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