linuxcontainers/unbound repository overview

⁠Unbound in Alpine Linux for Docker

This Docker image (linuxcontainers/unbound)⁠ is based on the minimal Alpine Linux⁠.

⁠Alpine Version 3.12.0 (Released Jun 1, 2020)

This docker image is the base Alpine Linux. For more info on versions & support see Releases⁠

⁠Unbound Version 1.10.1 (Released May 19, 2020)

Unbound is a recursive DNS server. It does caching, full recursion, stub recursion, DNSSEC validation, NSEC3, IPv6. More information can be found at the http://unbound.net⁠ site.

---

⁠What is Alpine Linux?

Alpine Linux is a Linux distribution built around musl libc and BusyBox. The image is only 10 MB in size and has access to a package repository that is much more complete than other BusyBox based images. This makes Alpine Linux a great image base for utilities and even production applications. Read more about Alpine Linux here and you can see how their mantra fits in right at home with Docker images.

⁠What is Unbound?

Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards. Late 2019, Unbound has been rigorously audited, which means that the code base is more resilient than ever.

⁠Features

Caching resolver with prefetching of popular items before they expire
DNS over TLS forwarding and server, with domain-validation
DNS64
DNSCrypt
DNSSEC validating
EDNS Client Subnet