Re: ssh-ing in inside private network
Mark Fletcher wrote:
> --001a114056c6437ae5053437ad41
> Content-Type: text/plain; charset=UTF-8
>
> On Wed, Jun 1, 2016 at 9:10 PM Dan Purgert <dan@djph.net> wrote:
>
>> Lisi Reisz wrote:
>> > On Tuesday 31 May 2016 23:56:02 Richard Hector wrote:
>> >> On 01/06/16 07:31, Lisi Reisz wrote:
>> >> > Now to do what I really wanted to do all along, and ssh in to run
>> level
>> >> > one as root:
>> >> >
>> >> > lisi@Tux-II:~$ ssh root@192.168.0.5
>> >> > ssh: connect to host 192.168.0.5 port 22: No route to host
>> >> > lisi@Tux-II:~$ ssh lisi@192.168.0.5
>> >>
>> >> Run level one? AKA single user mode? I wouldn't expect to find sshd
>> >> running in single user mode. Without checking, I'm not sure I'd even
>> >> expect networking to be up.
>> >>
>> >> Richard
>> >
>> > Yes, I had come to the conclusion that that was probably the problem.
>> > Networking does appear to be up since nmap found a host having scanned
>> > the ports.
>>
>> You'll need to reset the init script to fire at runlevel 1. Not sure
>> how you go about this in a systemd setup.
>>
>> That being said, the 'init' manpage has the following warning:
>>
>> # On a Debian system, entering runlevel 1 causes all processes to be
>> # killed except for kernel threads and the script that does the killing
>> # and other processes in its session. As a consequence of this, it isn't
>> # safe to return from runlevel 1 to a multi-user runlevel: daemons that
>> # were started in runlevel S and are needed for normal operation are no
>> # longer running. The system should be rebooted.
>>
>> I'm not sure if this holds for systemd-init though.
>>
>>
>>
> To add to that, and not to make value judgements, but the point of
> Runlevel 1 is that it is single user mode. The whole point is that
> there is only one person logged in, _via the console_, and no one else
> can be logged in doinanything, and therefore it is safe to perform
> maintenance like taking disks offline to back them up (back in the
> days when that was the main / only way to do it) or other similar
> maintenance tasks.
>
> So, running the ssh daemon in Runlevel 1 is like, well, like trying to fit
> brake blocks to a tomato. It just doesn't make a lot of sense. I think I
> missed what you were actually trying to do but does it really need to be
> done in Runevel 1? Because Runlevel 1 and remote access to the machine
> aren't concepts that belong in the same sentence, at least without a
> negative.
>
> Sorry, probably not what you wanted to hear but...
I came "late" to the party myself, and missed the post where I imagine
why Lisi is after runlevel 1.
Personally, with the exception of my laptop, everything starts in
runlevel 3 here.
Reply to: