djbdns

[Jason Fesler]

> But my clients use de same ip for cache(dnscahe=my actully public ip) and

You can't (without patches at least) run both dnscache (resolver) and
tinydns (authoritive) on the same single IP.

On my own system, I run dnscache on 127.0.0.1; I run tinydns on my main
ethernet IP; and I run a resolver for clients on a virtual IP.  One
machine can handle it, but you'll need more than one public IP.