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
has the correct, new information, but the slave nameservers are
never notified of the change and do not attempt to refresh their
data of that zone.
-
Be careful to use ellipses and semi-colons
correctly in the /etc/named.conf
file.
An omitted semi-colon or unclosed ellipse section can 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 configuration file.
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. To force named to use port 53, add the following line to the
options statement of /etc/named.conf:
query-source address * port 53;
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