By default, all IPs that are mentioned as slave NS as per the zone file, are allowed to pull a zone transfer. So technically, no “Allow-Transfer” is required at all for those. You only need to allow-transfer if you have additional nameservers, or special IPs, that are not listed as NS.
If you have those, you can put the allow-transfer directive in BIND’s global options file instead of the options for each zone.
EDIT: Sorry, I mixed up “allow-transfer” and “also-notify” up there. Notifies are automatically sent to all slave NS, but you indeed need to allow them to do zone transfers. If no IPs are listed for zone transfer, EVERYONE can do transfers.
So, you could put this in the options{ block of named.conf.options, 5.5.6.6 being an example IP.
thanks that’s what i have done
but i did not remember having done that the first time. I thought there was a place in Virtualmin to add a Allow Transfer ip on all sites at once