CoreDNS

• https://coredns.io/plugins/acl/
• https://github.com/coredns/example/blob/master/example.go
• https://github.com/miekg/local/blob/master/local.go
• https://coredns.io/2017/03/01/how-to-add-plugins-to-coredns/
• https://coredns.io/plugins/
• https://coredns.io/manual/toc/
• https://coredns.io/plugins/proxy/
• https://github.com/coredns/coredns/issues/2277
• https://github.com/coredns/rrl
• https://gist.github.com/walm/0d67b4fb2d5daf3edd4fad3e13b162cb

Golang

• https://medium.com/@openmohan/dns-basics-and-building-simple-dns-server-in-go-6cb8e1cfe461
• https://gist.github.com/walm/0d67b4fb2d5daf3edd4fad3e13b162cb
• https://github.com/openmohan/lightdns