Simple definition
An SSH jump host is an intermediate system used to reach otherwise inaccessible machines securely.
Purpose and use
An SSH jump host supplies an intermediate path to a server that the client cannot reach directly.
How does it work?
With a mechanism such as ProxyJump, the target connection passes through the jump host while retaining target authentication.
Example and verification
Verify jump-host access, permitted destinations and the final server’s identity separately.
Points to watch
The jump host does not automatically grant rights on the target. Its availability and logging become important parts of the access path.
In short
An intermediate network path does not replace authentication or authorization on the final server.