I have a DNS server up and running with a zone configured for my domain with the allow-update directive enabled. I have the initial configuration for the domain in the file /var/cache/bind/db.mydomain.com this file has a line with $INCLUDE db.aux.mydomain.com directive to load records from this file.
The problem comes when I do an update of the zone using nsupdate because bind rewrites the file db.mydomain.com by deleting the $INCLUDE line and putting the content of db.aux.mydomain.com directly in db.mydomain.com file.
How I can prevent this?