ODK aggregate public IP

Hello! I have installed and configured ODK Aggregate on Apache Tomcat. When it is asked me to give internet visible IP Address or DNS Name, I gave private IP Address. Now I want to make available my server on the internet, how can I change the internet visible IP Address manually to public IP Address.
Kindly reply me as soon as possible

if you create a war package in the install, you should create a new package with the new IP