I am currently upgrading my Bind DNS Server version 4.1 to 9.3 ...

My secondary DNS server is hosted by our internet providers and i would
like to be sure that zone-transfers will work perfectly after the migration.

On my named.conf file, i have defined this:

key "rndc-key" { algorithm hmac-md5; secret "jdhfjddf@@{#\{#\"; };

controls {
inet allow { any; } keys { "rndc-key"; };

acl "secondary_servers" {;;;;

options {

check-names master fail;
check-names response ignore;
check-names slave warn;
directory "e:\named\zones";
allow-transfer {"secondary_servers"; };

query-source address * port 53;

In my zone files, i have defined secondary server ip as NS

Can you please confirm that this configuration is correct?

Thank you in advance