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From: "Kristof Provost" <kristof@sigsegv.be>
To: "David Mehler" <dave.mehler@gmail.com>
Cc: freebsd-questions <freebsd-questions@freebsd.org>
Subject: Re: Two pf questions
Date: Wed, 29 Mar 2017 23:06:37 +0200
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On 27 Mar 2017, at 16:37, David Mehler wrote:
> My second question is one of nat reflection is the term. I've got a
> jail running a service on port 8000. I've got external redirect rules
> and pass rules passing in the traffic. The problem is I've got need to
> get access to that machine port 8000 on the host machine.
>
> I try something like ssh user@xxx.xxx.xxx.xxx -p 8000
>

Presumably you’ve got a rule like this:
rdr on $ext_if proto tcp from any to any port 8000 -> $jail port 80

Add something like
rdr on $int_if proto tcp from $localnet to ($ext_if) port 8000 -> $jail 
port 80

Regards,
Kristof