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SAMBA 4.24
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# 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:

- Since Samba 4.17, it is recommended to use the hybrid DNS mode with Bind9 for optimal performance and scalability. However, Samba-AD still includes its own internal DNS server, which is fully operational upon installation.

- 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 Debian and derivatives or Redhat and derivatives.