Hi matt,
NAT has the advantage of saving address schemes but also a security function is to hide inside addres scheme from the outside, so of caurse you cannot initiate connection from outside interface through a NAT'ed or PAT'ed device, only through static translation (one-to-one address translation):
interface
ip nat outside
interface
ip nat outside
ip nat inside source static
inside local ip is the address of your inside server.
You can use your outside interface ip as inside global address but any request to your router interface will be redirected to your internal host only if you have a dedicated global address to assign to your internal server.
