The domain name system is basic infrastructure for the Internet. Working DNS underlies most operations, and yet it appears to be a black box to a very large number of system (and network) administrators.

This talk is aimed at anyone with a basic knowledge of Unix and the Internet with an interest in DNS, and ensuring site availability.

We cover:
The basics of DNS
Registrars and registries
Running your own recursive resolver
Running your own authoritative nameserver (starting from the root).
Scaling the DNS system, including multiple servers and anycast
Building a reliable DNS system
Distributing global traffic with GeoIPs and CDNs.
Securing DNS