How to access pc on intranet thru public domain

Hi,

We have a cluster of PCs say given internal IP address 192.168.xxx.xxx. They communicate internally thru the assigned addresses to each other. Then there is a zynx router which is access point for external world. Currently when a user types one public domain IP, he has a view (GUI) to one of the private pc. Now we want to allow connectivity to one of the other PC thru this GUI. Would you suggest some solutions.

As per my understanding goes, there are 2 solutions that I can think of.
-> Assign an external IP address to this machine and export that to the zynx routing table. So, one has access to that PC.
-> Write some code/script to re-direct the connection to other PC from the PC which is accessible. The response from invisible PC is then passed transparently to the outside user's browser which interprets the data and gives him view to now (became visible PC)?

Kindly ignore security issues for a while...
I read there was similar query asked by somebody to which there was reply that one can do port-redirection <ip-public@port -- ip-privt> ... I didn't get that properly..I will have to check whether on zynx can we do that ?

please advice...

thanks

Not sure if this answers your question. But if you want to have multiple webservers behind the router with different websites on them you can setup a http proxy. Have port 80 be forwarded to the proxy and the proxy will forward to the right private IP based on the website name.