Closed port 22 in the jail redirects to the outer system

Arthur Chance freebsd at
Wed Dec 7 16:22:39 UTC 2016

On 07/12/2016 15:52, markham breitbach wrote:
> On 2016-12-06 5:24 PM, Bertram Scharpf wrote:
>> How can I make a port 22 request fail if an SSH server is
>> running on the outer machine but not inside the jail?
> By default sshd on the jail host (outer machine) will bind to all
> available addresses.  You can just set the listenAddress for sshd to be
> the IP address that you want it to listen to in /etc/ssh/sshd_config and
> restart sshd.

This is all documented in the "Setting up the Host Environment" section
of the jail(8) man page. It's worth looking at that because other
daemons may be affected.

Schrödinger's cat had 18 half lives.

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