I have configured NGINX HA SSL Proxy addon in my HA server using .duckdns.org in “Domain” option and provided Certificate File and Private Key File.
It works fine when I am using a cell phone data plan, but my company put duckdns.org in black list, so I cannot access HA when I am in the office.
I am asking if NGINX can support multiple domains in one HA server? Do I need to re-create thecertificate file and private key file with the new domain?
There must be a very strong reason for them to go to the effort to do this, and you may very well be outside your employment terms and conditions attempting to bypass this.
First, speak to your personnel manager about accessing home stuff during work time, and work facilities, then your IT department about the security implications of connecting to an probably insecure, unknown hardened system to your corporate environment that they would like to keep secure.
Oh, polish up your cv - they are probably monitoring you, gathering evidence to fire you.