Does 0patch Agent have to communicate with 0patch Server? – Help Center

Yes. In order to get registered and download patches from the server, 0patch Agent needs to be able to connect to 0patch Server. It initially connects to 0patch Server immediately after installation when you register the Agent, and then every 60 minutes when it »syncs« with the server to see if any new patches have become available, and whether the 0patch account administrator issued any instructions for it.

Note that 0patch Agent keeps protecting the computer, and is applying all applicable patches it has previously downloaded from 0patch Server even when the computer is offline or otherwise unable to connect to 0patch Server. Being unable to connect to the server only means that the local patch database
cannot be updated with new patches, and the agent can't be centrally managed.