@reddychaitu2002 said in Unable to create proxmox VMs internal/external network:
The dedicated server (It has Proxmox OS) has several VMs (Ubuntu server) and each VM should be connected to one subdomain and all subdomains (ex1.example.com, ex2.example.com, etc) must be accessible via the external IP address (17*...**2).
You cannot use 17*...**2 for that, since it is natted to Proxmox. With NAT 1:1 that public can be used by Proxmox only.
Why 1:1??
I know, it was done by the provider, but why? I think you only need the Proxmox management port, this is only one unique port. 1:1 directs any port to the internal IP.
You also have a second public IP as you wrote. What about that?
I assume, you want to use these subdomain for webservers. To redirect one public IP to multiple internal webservers you can use the haproxy package.