Editing DNS (section)

= Restore deleted domain =

In the event a domain (zone file or done definition inside named.conf) is deleted, restoring is easy.
We make backups of the mail server daily, included in that are bind config files and domains. These backups may be found on backup1:

 /data/www/daily

and are organized by date. So diggind in, we will find all the files we're looking for here (for example):

<pre>ls /data/www/daily/12-12-28/mnt/data1/ns1c-dir/etc/namedb/
bind.keys                                                 named.orig
copys.sh                                                  named.prev
createzones.pl                                            named.root
k                                                         named.root.orig
make-localhost                                            named.stats
named.conf                                                named.tar
named.conf.back-200908140748                              ns2c.tar
named.conf.bak_pre_remove_allow-query_and_allow-transfer  PROTO.localhost.rev
named.conf.before.mass.import.2003-10-23                  PROTO.localhost-v6.rev
named.conf.orig                                           rndc.conf
named.conf.ORIGINAL                                       s
named.core                                                sendzones.pl
named_head</pre>

and all the zonefiles are inside the 's' directory as they are on ns1c. So to restore a zonefile you'd simply copy it from the 's' directory on backup1 back to <tt>/etc/namedb/s</tt> on ns1c:

 scp 69.55.230.11:/data/www/daily/12-12-28/mnt/data1/ns1c-dir/etc/namedb/s/zonefile /etc/namedb/s

For good measure, increment the serial and restart bind.

Similarly, if you need to restore zones deleted from named.conf you can edit named.conf on backup1 and copy the domain blocks over to the live named.conf on ns1c, or you could copy over named.conf itself back to ns1c. This can be dangerous especially if you're potentially overwriting any changes which occurred after the backup was run.