Our Company is planning to publish Share Point Portal Server 2003 on
Internet same as we are using Outlook Web Access to access our office
e-mail through internet from any place of out side company.

We just enter www.icsc.com/exchange for outlook web access.

Please let me know that how I can access out Portal WSS sites from
internet. Any separate license from Microsoft required for that.

Let me complete procedure / steps or any web site as reference.