Unbound – Validating DNS Resolver

Unbound is a validating, recursive, and caching DNS resolver designed for high performance and security....

Networking Tools Linux Open Source

Unbound is a validating, recursive, and caching DNS resolver designed for high performance and security. It supports DNSSEC validation out of the box and is commonly used as a local DNS server for privacy, speed, and security improvements over ISP-provided DNS.

📑 Table of Contents

Key Features

  • DNSSEC Validation – Built-in security validation
  • Privacy Features – DNS over TLS/HTTPS support
  • High Performance – Efficient caching and prefetching
  • Lightweight – Low resource consumption

Installation

sudo apt install unbound    # Debian/Ubuntu
sudo dnf install unbound    # Fedora/RHEL

# Download root hints
sudo wget -O /var/lib/unbound/root.hints https://www.internic.net/domain/named.root

Basic Configuration

# /etc/unbound/unbound.conf
server:
    interface: 127.0.0.1
    access-control: 127.0.0.0/8 allow
    do-ip6: no
    prefetch: yes
    cache-min-ttl: 300
    
# Start service
sudo systemctl enable --now unbound

Download Unbound

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