Setting Up a Secure Internal DNS Resolver with Unbound

Unbound is a validating, recursive DNS resolver focused on security and performance. It’s a perfect choice for internal DNS resolution.

To secure it:

Enable DNSSEC validation

Configure access control to allow only internal subnets

Enable logging to detect suspicious patterns

Use TLS forwarders or QNAME minimization

Automating Unbound deployments using Ansible or Packer can further harden consistency and security.