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Groups > linux.debian.user > #179315

Re: SSH Access Issue

From Nate Bargmann <n0nb@n0nb.us>
Newsgroups linux.debian.user
Subject Re: SSH Access Issue
Date 2017-03-25 19:10 +0100
Message-ID <toYiu-4wW-25@gated-at.bofh.it> (permalink)
References <toXPr-43b-1@gated-at.bofh.it>
Organization Amateur Radio!

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* On 2017 25 Mar 12:36 -0500, Philippe LeCavalier wrote:

> One obvious aspect is firewalling. Rest assured I have opened TCP 22 and
> ofrwarded to the correct host(the debian box). I can access all the other
> forwarded services I've configured without issues but not SSH on the Deb
> box. I can see the connection go through the firewall in the live feed but
> the box doesn't answer.

Is there a firewall running on the server that is blocking port 22?

> sshd_config is stock and daemon is running yet I get nothing in the logs.
> Not even attempts with DEBUG enabled.

Usually if there is a firewall running on the box, entries will be found
in syslog, but your logs are quiet.

A default sshd_config has ListenAddress set to 0.0.0.0, if it were set
to anything other than the network IP address, that would cause an issue

Otherwise, I'd make sure the router is actually forwarding port 22 to
the right box.

I've found some ISPs block port 22 to their customers.  In that case, a
port above 1024 can be used and the router can then forward that
connection to the server on port 22.

- Nate

-- 

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

Ham radio, Linux, bikes, and more: http://www.n0nb.us

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Thread

SSH Access Issue Philippe LeCavalier <support@plecavalier.com> - 2017-03-25 18:40 +0100
  Re: SSH Access Issue David Christensen <dpchrist@holgerdanske.com> - 2017-03-25 19:10 +0100
  Re: SSH Access Issue Nate Bargmann <n0nb@n0nb.us> - 2017-03-25 19:10 +0100
    Re: SSH Access Issue Philippe LeCavalier <support@plecavalier.com> - 2017-03-25 20:00 +0100
      Re: SSH Access Issue Philippe LeCavalier <support@plecavalier.com> - 2017-03-25 20:00 +0100
        Re: SSH Access Issue <tomas@tuxteam.de> - 2017-03-25 23:00 +0100
          Re: SSH Access Issue Philippe LeCavalier <support@plecavalier.com> - 2017-03-26 14:30 +0200
            Re: SSH Access Issue Cindy-Sue Causey <butterflybytes@gmail.com> - 2017-03-26 16:30 +0200
              Re: SSH Access Issue Cindy-Sue Causey <butterflybytes@gmail.com> - 2017-03-26 16:40 +0200
                Re: SSH Access Issue Joshua Schaeffer <jschaeffer0922@gmail.com> - 2017-03-27 00:10 +0200
                Re: SSH Access Issue Philippe LeCavalier <support@plecavalier.com> - 2017-03-27 03:10 +0200
            Re: SSH Access Issue David Christensen <dpchrist@holgerdanske.com> - 2017-03-26 21:10 +0200

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