About DNS

The DNS service manages the resolution of Active Directory internal names. It replaces the NetBios resolution in NT domains.

Ports used by the DNS service

Port

Usage

53

TCP and UDP

Two options are available:

  • By default, Samba-AD comes with its own internal DNS server that is fully operational upon installation of Samba.

  • For a more advanced or intense use of DNS, the Samba-team advises to use Bind9 as DNS backend (9.8 minimum version).

You may find useful to follow the Bind documentation for RedHat8 and derived distributions or for Debian.