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Re: ssh-ing in inside private network



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On Thu, Mar 31, 2016 at 02:40:58PM +0100, Brian wrote:
> On Thu 31 Mar 2016 at 14:38:05 +0200, tomas@tuxteam.de wrote:
> 
> > On Thu, Mar 31, 2016 at 01:32:05PM +0100, Brian wrote:
> > 
> > [...]
> > 
> > > There is also dropbear as a lightweight SSH2 server and client. Using
> > > it in preference to openssh is useful for resource constrained machines.
> > 
> > Yes, there are nifty tricks like embedding dropbear in the initrd, so
> > you can, e.g. enter the LUKS encryption passphrase to a server over the
> > 'net.
> > 
> > But I'd consider all of that "advanced usage" :-)
> 
> Indeed it is.
> 
> I had in mind a machine with 1GB of disk space; every MB of usage
> counts.

Nah -- 1GB is luxury: the whole openssh server is less than 0.8 MB.
Now with 4MB we're talking (one of my customers has a small embedded
Linux thing with 4MB flash and 4GB RAM; besides it's some 486 without
floating point: there we have to tread carefully :-)

But the openssh server from "back then" was smaller too...

> openssh-server takes six times as much space as dropbear; and
> that is without taking its dependencies into account! If all the
> features of openssh are not needed dropbear is as simple to install and
> use. Most people would not notice any difference.

But yes, basically agreed. If I had to redo the thing above, I'd
consider dropbear; that said, a re-doing would mean some raspi-like
hardware, which will be a "supercomputer" compared to what's installed
there now :-)

regards
- -- t
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