New server install, not in a domain, hosting 2 websites via IIS7

We have a new server running server 2008 standard x64 and we are not in a domain setting. we have 2 websites that are running on this machine which is assigned a static IP from the ISP and internally static assigned by router. No one can see the websites locally… such as www.example.com does not return the website however if we use an external device the website populates perfectly. What do I need to do any help is appreciated.