litespeed license check

I have bought and installed litespeed on my server. I'm using centos 7 - directadmin installed.
I'm using WAF service to hide my IP and DNS. I have white listed only my cuntries IPs. Last month I my site returned 503 error. I contacted my host provider and they said that litespeed checks the license from time to time and when it cannot contact the server IP, it suppose that the site is not working. How can I fix this problem the next time litespeed checks the license?
Thank you for your answer.
I don't know how to check LSWS. And you mean that litespeed doesn't checks the license ocasionally?