Internally, EPP-DRS generates and updates plain Bind zone files and named.conf on remote servers.
Before you enable Managed DNS in Settins » Core Settings, make sure that the following requirements are met:

• You have at least one unix/linux machine with Bind 9 or higher installed and configured. Chrooted Bind has not been tested.

You can register a server in Settings » Managed DNS » Nameservers » Add.

• You have a system user added on that machine (normally named or bind) that has access to
  • Log in via SSH remotely
  • Write to zones folder (Path to zone files folder)
  • Edit named.conf (Path to named.conf)
  • Execute rndc (Path to rndc binary)
    

When user edits DNS zones for his/her domain, changes being saved in database. EPP-DRS generates Bind zone files and named.conf periodically in DNSPush cronjob and saves them on servers.

• Default nameservers (Settings » Core settings » Registry options) point to same IP adresses as your Managed DNS nameservers.
• Appropriate NS records added in Settings » Managed DNS » Set default zone records for each of your Managed DNS nameservers.
  

• Set up a Bind9 package using your package manager or compile it from source. This will also create named or bind system user under which Bind 9 is running,
• Edit /etc/passwd and set a normal shell for the user (usually /bin/sh),
• Set new password for the user,
• Try to log is as user via SSH remotely,
• Try to create a file in Bind zone files directory (usually /var/named),
• Try to modify named.conf,
• If all above succeed, Go to Settings » Managed DNS » Nameservers » Add and add a server,
• Go to Settings » Managed DNS » Set default zone records and add a new NS record ”@ 14400 in NS <hostname>”

Where <hostname> is the hostname of your server. Be carefull, as there is no syntax validation performed on this page,

• Edit templates/DNS/zone.tpl if needed,
• Go to settings Settings » Core settings » Registry options and add your server hostname,

Now new users, if they leave default nameservers during registration, a new option Edit DNS zone will appear in option list for delegated domains.