It is very common for beginners to make mistakes when editing BIND
configuration files. Be sure to avoid the following issues:
Take care to increment the serial number when editing
a zone file.
If the serial number is not incremented, the master nameserver
may have the correct, new information, but the slave nameservers
will never be notified of the change or attempt to refresh their
data of that zone.
Be careful to use ellipses and semi-colons correctly in the
An omitted semi-colon or unclosed ellipse section will cause
named to refuse to start.
Remember to place periods
(.) in zone files after all FQDNs
and omit them on hostnames.
A period at the end of a domain name denotes a fully qualified
domain name. If the period is omitted, then named
appends the name of the zone or the $ORIGIN value
to complete it.
If a firewall is blocking connections from the
named program to other nameservers, edit its
By default, BIND version 9 uses random ports above 1024 to query
other nameservers. Some firewalls, however, expect all nameservers
to communicate using only port 53. Force named to
use port 53 by adding the following line to the
options statement of
query-source address * port 53;