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Date:      Wed, 13 Nov 2019 18:19:47 -0500
From:      Phil Staub <phil@staub.us>
To:        =?UTF-8?Q?Morgan_Wesstr=C3=B6m?= <freebsd-database@pp.dyndns.biz>
Cc:        freebsd-pf@freebsd.org
Subject:   Re: NAT for use with OpenVPN
Message-ID:  <CAMnCm8hgEsbAoO9Wzjzi=V0_fjCciyTxs7w__rPkgSyexqNpcw@mail.gmail.com>
In-Reply-To: <bd92ea85-0441-46f9-b162-511846d87e57@pp.dyndns.biz>
References:  <mailman.6.1573387200.62111.freebsd-pf@freebsd.org> <CAMnCm8jZQi-UKm_-hF8WS0cofq0OWWP_d5No1AbOP8_KgQE5ZA@mail.gmail.com> <baa548e5-7dc3-05cf-0275-902d0193fc21@pp.dyndns.biz> <CAMnCm8iZ4iLJYOUFFpoTpF_=9xpG2=MN77xi%2BtGaSqumHeeqkQ@mail.gmail.com> <8ba7182d-8c4e-e10e-467b-6cf447490151@pp.dyndns.biz> <CAMnCm8gA_V1trdZtpidms54cmf4TL=R2BZ2MP52fJKrjndxtzA@mail.gmail.com> <fa9054ac-b22f-b873-0749-742b73100dba@pp.dyndns.biz> <CAMnCm8gN9aYgsJQYCuppGQ1M-YPwe1y7kaQCeEcDChrogsXj0w@mail.gmail.com> <b574e8e2-a921-99b8-2d2f-b3dc70341ce3@pp.dyndns.biz> <CAMnCm8gS40S27uOHYiKPp5E2hZhg=FknxTKxSsuH6vgOBD5Z9g@mail.gmail.com> <ef17181f-61b3-c2eb-9ebb-49e437ceea76@pp.dyndns.biz> <CAMnCm8hpTmww-pV%2BFbOcMJwk%2Bz1_bSs%2BcVJg5eu5zm84K8RPSA@mail.gmail.com> <cf52cc1b-c979-155c-604b-8918ac5fc2d6@pp.dyndns.biz> <CAMnCm8i46JOW-bGOutRyxUtJspeSkz4ZjfAQ=XGe_KtbeF387w@mail.gmail.com> <5fce41df-37fb-fc8c-be80-f47dfd0d04ad@pp.dyndns.biz> <CAMnCm8g8OHZdZnuC3qokQ643atK1VQ9DK4qKV_a2GN2Vw=ts=w@mail.gmail.com> <bd92ea85-0441-46f9-b162-511846d87e57@pp.dyndns.biz>

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On Wed, Nov 13, 2019 at 5:37 PM Morgan Wesstr=C3=B6m <
freebsd-database@pp.dyndns.biz> wrote:

> > See my follow up message. It's the SNAT directive. The tutorial I was
> > looking at was
> >
> > https://www.karlrupp.net/en/computer/nat_tutorial
>
> Well, I'm too inexperienced with iptables to give you and advice here
> unfortunately.
>
> > Definitely. I assume the way to test that would be to attempt to access
> > my router from the outside the same way I would when I log in from the
> > inside.
>
> Yes, connect your phone with mobile data only (no WiFi) and no VPN and
> you can try to browse to the admin interface on your external ip. For a
>

It never connects. The connection times out.

more thorough test you could install Termux which will give you a Linux
> terminal in your phone. It comes with a built-in package manager so you
> can install your favourite Linux tools. You can use it to install nmap
> which is the defacto port scanning tool to use. The man page will give
> you some examples of the syntax and it will scan for open ports. It
> should only find your 1194 port used by OpenVPN.
>

I have been using a different terminal emulator, but I like Termux. I
couldn't figure out how to do ctrl characters with the one I was using.

nmap reports only one port open: 1720! I don't know what that's all about,
but another port scanner I have been using didn't find that that port is
open.

Anyway, I'm going to be taking my laptop outside my home WiFi this evening
and I'll see if I can get in to my local network with the OpenVPN client.

Phil




>
> /Morgan
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