Bind 9 Administrator Reference Manual

Chapter 6. BIND 9 Configuration Reference
pid-file
The pathname of the file the server writes its process ID in. If not specified, the default is
/var/run/named.pid. The pid-file is used by programs that want to send signals to the running
nameserver.
statistics-file
The pathname of the file the server appends statistics to when instructed to do so using rndc stats.
If not specified, the default is named.stats in the server’s current directory. The format of the file
is described in Section 6.2.14.15
port
The UDP/TCP port number the server uses for receiving and sending DNS protocol traffic. The
default is 53. This option is mainly intended for server testing; a server using a port other than 53
will not be able to communicate with the global DNS.
random-device
The source of entropy to be used by the server. Entropy is primarily needed for DNSSEC
operations, such as TKEY transactions and dynamic update of signed zones. This options specifies
the device (or file) from which to read entropy. If this is a file, operations requiring entropy will fail
when the file has been exhausted. If not specified, the default value is /dev/random (or equivalent)
when present, and none otherwise. The random-device option takes effect during the initial
configuration load at server startup time and is ignored on subsequent reloads.
6.2.14.1. Boolean Options
auth-nxdomain
If yes, then the AA bit is always set on NXDOMAIN responses, even if the server is not actually
authoritative. The default is no; this is a change from BIND 8. If you are using very old DNS
software, you may need to set it to yes.
deallocate-on-exit
This option was used in BIND 8 to enable checking for memory leaks on exit. BIND 9 ignores the
option and always performs the checks.
dialup
If yes, then the server treats all zones as if they are doing zone transfers across a dial on demand
dialup link, which can be brought up by traffic originating from this server. This has different effects
according to zone type and concentrates the zone maintenance so that it all happens in a short
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