Better filtering on values for CNAME and TXT records. Use named-checkzone domain.com /var/named/domain.com.db.temp before copying the zone to domain.com.db. You can shut off this check by adding: named_checkzone=0 to your directadmin.conf, and restarting DA. This feature will be enabled by default. It's possible that you may already have zones with invalid data, but do not cause named to crash. If this is the case, this check will block you from adding new records until the bad ones are removed/fixed. It assumes you have: /usr/sbin/named-checkzone If you don't, you'll get errors in your error.log, but the zone will still be saved.