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jail.conf:

ssh { exec.start = "/bin/sh /etc/rc"; exec.stop = "/bin/sh /etc/rc.shutdown"; exec.clean; mount.devfs; path = "/var/jail/ssh"; host.hostname = "ssh"; vnet; vnet.interface += "em0"; }

It's IPv6 only, so this is key in rc.conf: rtsold_enable="YES"

OpenBSD PF based router does the rest. IPv6 simplifies things here.

PF on FreeBSD isn't the most ideal, sure, but I can limit local access on inet6.

For SSH tunnel, it's straight forward.



FWIW VNET is not inherently IPv6 only. I'm using it in an IPv4 only context just fine.




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