About apply license to WHM&CPanel behind two high available firewalls.

I have the problem:

My server's IP licensed to CPanel is 103.27.xxx.xxx
My server's Public IP to access to CPanel is 103.27.xxx.xxx
My server's Local IP is 172.16.x.xx
High Available firewall 1: 103.27.xxx.xx
High Available firewall 2: 103.27.xxx.xx

After installing CPanel i see local ip 172.16.x.xx NAT to 103.27.xxx.xxx
So when i run this script # /usr/local/cpanel/cpkeyclt
Updating cPanel license...Done. Update succeeded.
Building global cache for cpanel...Done

but when i access to WHM&CPanel it still infos:
Trial License
This copy of cPanel & WHM is for trial use and will expire at the end of the trial period. You will need to upgrade to a paid copy of cPanel & WHM to continue using the software after that period.
Please help me to resolve this problem.
Thank you so much.

 

This problem resolved, it relates to my HA firewalls.
Thank you so much, Michael.