Re: [OT] Remote SSH (dynamic IP) without third-party server

From	Nate Bargmann <n0nb@n0nb.us>
Newsgroups	linux.debian.user
Subject	Re: [OT] Remote SSH (dynamic IP) without third-party server
Date	2020-08-01 19:50 +0200
Message-ID	<Az3NU-2TQ-3@gated-at.bofh.it> (permalink)
References	<AyP8d-1fa-1@gated-at.bofh.it>
Organization	Amateur Radio!

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

* On 2020 31 Jul 21:04 -0500, riveravaldez wrote:
> Is this possible?
> 
> Hi, to clarify: I would like to connect to a remote home-machine
> (dynamic IP) through SSH session but without using a third-party
> server (free or paid), just with software running in both machines.

Easy enough with SSH so long as the routable IP address of the target
machine is known.

> If so, would be possible to use a similar mechanism to obtain at any
> moment the counterpart's IP and then make a SSH login using such
> information?

This is where a dynamic DNS provider comes in as there needs to be some
way to discover the routable IP address of the target machine.

Years ago ISPs provided Web server space for personal home pages and
such, a practice that has largely stopped.  I started with writing a
script that scraped my router at the time for the routable IP address
and then uploaded it to my personal Web hosting.  As I knew the file
name I could grab it even though no one else would see it or know it was
there since the Web server sent the index.html file by default when
anyone tried to access the directory with http.  The file placed on the
Web host was a simple two liner with a date/time stamp and the IP
address.  I could then set my SSH alias to that IP address.  As the IP
address did not change often it was quite stable.

Changing to OpenWRT routers meant I lost the Web page to scrape.  I now
have a small PHP script on my Web host (now a paid hosting account
serving my domain) that returns the public IP address and the script
extracts it and updates the "hidden" file.

Now, even that is more or less out of date as since I set up a Freedom
Box, I am eligible for a no cost HOST.freedombox.rocks domain.  Now I
can just point my SSH alias to that (I use non-standard SSH ports and
port forwarding on my router to access a specific host on my LAN).  I
still have my script updating every hour "just in case".

All of these "solutions" require at least a third server which you're
trying to avoid.  Sorry.

- Nate

-- 

"The optimist proclaims that we live in the best of all
possible worlds.  The pessimist fears this is true."

Web: https://www.n0nb.us
Projects: https://github.com/N0NB
GPG fingerprint: 82D6 4F6B 0E67 CD41 F689 BBA6 FB2C 5130 D55A 8819

Thread

[OT] Remote SSH (dynamic IP) without third-party server riveravaldez <riveravaldezmail@gmail.com> - 2020-08-01 04:10 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server David Christensen <dpchrist@holgerdanske.com> - 2020-08-01 08:20 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server deloptes <deloptes@gmail.com> - 2020-08-01 14:00 +0200
      Re: [OT] Remote SSH (dynamic IP) without third-party server Dan Purgert <dan@djph.net> - 2020-08-01 17:50 +0200
      Re: [OT] Remote SSH (dynamic IP) without third-party server David Christensen <dpchrist@holgerdanske.com> - 2020-08-02 00:30 +0200
        Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-02 01:10 +0200
          Re: [OT] Remote SSH (dynamic IP) without third-party server David Christensen <dpchrist@holgerdanske.com> - 2020-08-02 03:50 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server <tomas@tuxteam.de> - 2020-08-01 09:50 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server martin f krafft <madduck@debian.org> - 2020-08-01 12:30 +0200
      Re: [OT] Remote SSH (dynamic IP) without third-party server tomas@tuxteam.de - 2020-08-01 14:40 +0200
        Re: [OT] Remote SSH (dynamic IP) without third-party server martin f krafft <madduck@debian.org> - 2020-08-02 01:20 +0200
      Re: [OT] Remote SSH (dynamic IP) without third-party server riveravaldez <riveravaldezmail@gmail.com> - 2020-08-02 04:40 +0200
        Re: [OT] Remote SSH (dynamic IP) without third-party server martin f krafft <madduck@debian.org> - 2020-08-03 01:10 +0200
          Re: [OT] Remote SSH (dynamic IP) without third-party server martin f krafft <madduck@debian.org> - 2020-08-11 01:20 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Joe <joe@jretrading.com> - 2020-08-01 10:00 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server riveravaldez <riveravaldezmail@gmail.com> - 2020-08-01 11:40 +0200
      Re: [OT] Remote SSH (dynamic IP) without third-party server deloptes <deloptes@gmail.com> - 2020-08-01 14:10 +0200
        Re: [OT] Remote SSH (dynamic IP) without third-party server mick crane <mick.crane@gmail.com> - 2020-08-01 14:30 +0200
        Re: [OT] Remote SSH (dynamic IP) without third-party server rhkramer@gmail.com - 2020-08-01 17:30 +0200
        Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-02 06:00 +0200
          Re: [OT] Remote SSH (dynamic IP) without third-party server Gene Heskett <gheskett@shentel.net> - 2020-08-02 07:10 +0200
            Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-02 22:10 +0200
              Re: [OT] Remote SSH (dynamic IP) without third-party server Gene Heskett <gheskett@shentel.net> - 2020-08-02 22:50 +0200
          Re: [OT] Remote SSH (dynamic IP) without third-party server Greg Wooledge <wooledg@eeg.ccf.org> - 2020-08-03 14:00 +0200
            Re: [OT] Remote SSH (dynamic IP) without third-party server Greg Wooledge <wooledg@eeg.ccf.org> - 2020-08-03 21:20 +0200
              Re: [OT] Remote SSH (dynamic IP) without third-party server Charles Curley <charlescurley@charlescurley.com> - 2020-08-03 23:10 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server rhkramer@gmail.com - 2020-08-03 23:30 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-04 03:10 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-04 03:40 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-04 04:10 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Stefan Monnier <monnier@iro.umontreal.ca> - 2020-08-04 04:20 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-04 06:00 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-04 14:40 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-11 06:20 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Greg Wooledge <wooledg@eeg.ccf.org> - 2020-08-11 13:40 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-12 05:30 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-11 14:20 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-12 05:30 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-12 13:40 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-13 16:10 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Celejar <celejar@gmail.com> - 2020-08-04 16:10 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-04 14:40 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Charles Curley <charlescurley@charlescurley.com> - 2020-08-04 19:50 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Greg Wooledge <wooledg@eeg.ccf.org> - 2020-08-04 13:50 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Celejar <celejar@gmail.com> - 2020-08-04 15:40 +0200
            Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-03 21:20 +0200
              Re: [OT] Remote SSH (dynamic IP) without third-party server Nate Bargmann <n0nb@n0nb.us> - 2020-08-04 02:00 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Wright <deblis@lionunicorn.co.uk> - 2020-08-04 03:10 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server Stefan Monnier <monnier@iro.umontreal.ca> - 2020-08-04 04:30 +0200
                Re: [OT] Remote SSH (dynamic IP) without third-party server David Christensen <dpchrist@holgerdanske.com> - 2020-08-04 10:50 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server "Thomas Schmitt" <scdbackup@gmx.net> - 2020-08-01 12:00 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Dan Ritter <dsr@randomstring.org> - 2020-08-01 13:10 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server rhkramer@gmail.com - 2020-08-01 13:20 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server David <bouncingcats@gmail.com> - 2020-08-01 14:10 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Reco <recoverym4n@enotuniq.net> - 2020-08-01 14:40 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Reco <recoverym4n@enotuniq.net> - 2020-08-01 14:40 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-01 17:20 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server "007@caiway.net" <007@caiway.net> - 2020-08-01 17:40 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server "007@caiway.net" <007@caiway.net> - 2020-08-01 18:10 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Nate Bargmann <n0nb@n0nb.us> - 2020-08-01 19:50 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Henrique de Moraes Holschuh <hmh@debian.org> - 2020-08-01 21:40 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server MAS Jean-Louis <jean-louis.mas@imag.fr> - 2020-08-04 16:00 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server Michael Stone <mstone@debian.org> - 2020-08-04 16:20 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server Andrei POPESCU <andreimpopescu@gmail.com> - 2020-08-04 17:40 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Andrei POPESCU <andreimpopescu@gmail.com> - 2020-08-04 17:50 +0200
  Re: [OT] Remote SSH (dynamic IP) without third-party server Curt <curty@free.fr> - 2020-08-04 19:10 +0200
    Re: [OT] Remote SSH (dynamic IP) without third-party server Gene Heskett <gheskett@shentel.net> - 2020-08-04 21:40 +0200
      Re: [OT] Remote SSH (dynamic IP) without third-party server Andrei POPESCU <andreimpopescu@gmail.com> - 2020-08-05 09:40 +0200

csiph-web