two ip address to apache server

["Mrs. Geeta Thanu" <geeta www cdfd org in>]

Hi gurus,

I like to give 2 IP address to my apache webserver.

public and private IP.I have natted this inthe firewall.

public ip  --->  private ip.

so when browsed from inside the URL formed shld be with private ip
and
when browsed from outside the URL formed shld be with public ip

please advice

thanks
Geetha