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Re: SSH Access Issue






On Sat, Mar 25, 2017 at 2:08 PM Nate Bargmann <n0nb@xxxxxxx> wrote:
* 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
It's 0.0.0.0 

Otherwise, I'd make sure the router is actually forwarding port 22 to
the right box.
As I mentioned, I can see the firewall forwarding the connection to the server. 

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.
I changed it to 2222 and still get the same issue. As with 22, after I change the port to 2222 I can successfully ssh to the box from within the LAN. 

- Nate

--

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

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Regards,
Phil