Hosting Website With My Own DNS Behind Router

dns server behind router

[leafytree]

I have a few machines behind a router and want to be able to set them up so that from the outside world they are

pcone.mydomain.com
pctwo.mydomain.com
etc..

I have a DNS server called simple dns plus. I want to host a website on one machine and other things on another. Will I have to change the routers DNS IP to the internal machine IP running Simple DNS Plus so that internet users will be pointed to the correct machine?

Also, say a user wants pctwo.mydomain.com which has an internal address, how will they get there, will my dns server redirect them to my internal ip.

I know this sounds confused, i am new to DNS and would be really greatful for help.

Thanks

[DaveAtIFG]

It does sound confused! :) If you haven't tried them already, these router setup tutorials [jhsoft.com] will probably be helpful.