Unbound is an open-source DNS resolver that is designed to be fast, secure, and easy to use. It was developed by NLnet Labs, and is widely used in both small and large networks.
Unlike BIND, Unbound is primarily designed to be used as a recursive DNS resolver, although it can also be configured as an authoritative DNS server. It is lightweight and efficient, making it ideal for use on smaller devices such as routers and embedded systems.
One of the key features of Unbound is its security. It supports DNSSEC (Domain Name System Security Extensions), which provides enhanced security for DNS queries and responses. It also includes built-in support for DNS-over-TLS and DNS-over-HTTPS, which encrypts DNS queries and helps to protect against eavesdropping and tampering.
Unbound is highly configurable and customizable, with a modular architecture that allows for easy extension and customization. It is designed to be easy to use, with a simple configuration file that can be easily edited by hand.
Overall, Unbound is a fast, secure, and easy-to-use open-source DNS resolver that is ideal for use on smaller devices and networks. Its focus on security and efficiency makes it a popular choice for users who are looking for a lightweight, reliable DNS resolver.