problem je v tom ze ked dam napr www.syntax.sk tak napise server not found ... co sedi s tym co pises ze pocuva len na localhoste ... otazka znie ako nastavit aby nepocuval len na locale ... 
It's easy

Do you speak english?
How do I use MyDNS but still allow external (recursive) lookups, like for "
www.google.com"?
To do this you need to use a program that does recursive DNS lookups. I recommend dnscache. You simply set up MyDNS to accept requests on your Internet-visible IP address, and dnscache to accept requests on 127.0.0.1. Detailed instructions can be found in the dnscache FAQ.
As of version 0.9.6, you can put something like this in your mydns.conf file, and MyDNS will listen on all addresses except 127.0.0.1:
listen = *
no-listen = 127.0.0.1