Change public to private

[rutekp]

Hi,

I need to change my public DirectAdmin adress to private. Is it possible ?

I found this:
https://www.directadmin.com/lan.shtml
but this is helpfull when DA isn't installed yet.
My already running

When I will change IP to private, the public adress which is NAT to private will change. It wont be that same as now is. So i need to change IP in license too.

How to start with this ?

OS is centos 7.

Thanks