Is there a way to configure the jump (hop) server to reroute the request based on the value of %h and/or %p? Otherwise, it's going to be quite difficult to configure something like HTTP virtual hosts.
EDIT: Looking at the relevant RFC [1] and the OpenSSH sshd_config manual [2], it looks like the answer is that the protocol supports having the jump server decide what to do with the host/port information, but the OpenSSH server software doesn't present any relevant configuration knobs.
[1]: https://www.rfc-editor.org/rfc/rfc4254.html#section-7.2
[2]: https://man7.org/linux/man-pages/man5/sshd_config.5.html
Yes, but it's not in the sshd config, it's in the ssh config. See ssh_config(5), search for Remote to find the most relevant sections.
I don't follow. If it's in ssh_config, then it's client-side. Either that's the client initiating the request, in which case it's not server-controlled like HTTP virtual hosts, or else it's the "client" involved in the hop through the jump server, in which case it's going to be specific to a single username. Also the Remote* options have to do with remote port forwarding, which is in the wrong direction.
What am I missing?