Finally some progress!
I got SSH to work, via my router, by enabling 'bridged adapter' (promiscous mode: allow all) in virtualbox, adjusting 'IPV4 bridge aliases' of my jail to 10.0.0.105, which is on my router subnet (10.0.0.1/24).
This is somewhat unsatisfactory though, since everything depends on my laptop being on my home router. I will thinker some more.
I got SSH to work, via my router, by enabling 'bridged adapter' (promiscous mode: allow all) in virtualbox, adjusting 'IPV4 bridge aliases' of my jail to 10.0.0.105, which is on my router subnet (10.0.0.1/24).
This is somewhat unsatisfactory though, since everything depends on my laptop being on my home router. I will thinker some more.