Category: Bind

Bind creates the “empty zones” by default. So, that is why the reverse DNS (the query type PTR) lookup does not work for a local addresses IP.
Define “empty-zones-enable no;” in named.conf this will work as you expect.

Also you can created reverse map zone for your local machines, for example:

zone "16.172.in-addr.arpa" IN {

type forward;
forwarders {172.16.53.50; 172.16.53.51; 172.16.53.52;};
forward only;
};

To limit the amount of memory a name server uses, use the max-cache-size options statement:

root# cat /etc/named.conf
options {
directory "/var/named";
max-cache-size 10m; // maximum cache size of 10MB
};
root#

This tells the name server to remove old, cached records early (i.e., before they’re stale) if the size of the cache reaches the limit.
Once this is set, you may also want to reduce the cleaning interval (the period at which the name server checks for stale records):

root# cat /etc/named.conf
options {
directory "/var/named";
max-cache-size 10m; // maximum cache size of 10MB
cleaning-interval 10; // clean cache every 10 minutes
};
root#

Also the following can be used the max-cache-ttl and max-ncache-ttl. These limit the time-to-live values of cached records and cached negative responses, respectively.

root# cat /etc/named.conf
options {
directory "/var/named";
max-cache-size 10m; // maximum cache size of 10MB
cleaning-interval 10; // clean cache every 10 minutes
max-cache-ttl 60; // limit cached record to a 60s TTL
max-ncache-ttl 60; // limit cache negative responses to a 60s TTL
};
root#

To disable caching, see this: Bind – disable caching

To disable caching on a name server, use the recursion options statement:

root# cat /etc/named.comf
--cut
options {
directory "/var/named";
recursion no;
};
--cut
root#

Disabling recursion is one of the most effective ways to limit the amount of memory a name server uses.
Processing a recursive query often requires a name server to query another name server, and the name server then caches the response.
It’s caching that causes a name server’s memory usage to increase over time.
Unfortunately, you can’t disable recursion on just any old name server.
Many name servers serve one or more authorized resolvers, and those resolvers need their recursive queries answered, well, recursively.
Name servers used as forwarders must process recursive queries, too.