So, here is the thing.
I have a server with static IP and a domain (example.com), and I have some other servers with changing locations and dynamic IPs and no domains. I wanna give them my subdomain (like 1.example.com); and when my costumers wanna go to 1.example.com, I want my main server forward them to the other server.
So I need to run a program on my other servers that listen to their IPs and send them to main server, after that I need a program that run on my main server that listen to other servers for their IPs and update the bind subdomain records.
I look the entire the Internet and I didn’t find anything suitable for my situation.
PS: I got a situation that my network is limited and I can not use "no-ip" or "duckdns" or similar.
I have apache2 on all the servers and they are all using "Ubuntu server".
What is the solution and what should I DO???!