[CentOS] scp setup jailed chroot on Centos7

Tue Oct 24 13:24:23 UTC 2017
rainer at ultra-secure.de <rainer at ultra-secure.de>

Am 2017-10-24 12:19, schrieb Adrian Jenzer:

> Hi Rainer
> I would if I could but external offers only FTP and SCP...
> 
> Regards Adrian


AFAIK, for scp you need a proper shell.

I've done that exactly once (chrooted ssh) and it was such a pain that I 
vowed to never do it again.

The problem is that inside the chroot, you need:

  - nameresolution
  - a minimal passwd/shadow/group file (or ldap)
  - maybe for scp, you can get away with a rather minimal device-tree - 
but for actual SSH access, I needed a fairly complete device tree inside 
the chroot (ttys ...).
  - that was with FreeBSD 10, I never tried it with anything else (due to 
its history with jails, creating functional, limited chroot-environments 
is somewhat in its genes, so to speak)

Somebody sent me the link to these scripts:

https://github.com/codelibre-net/schroot

Maybe you can use those scripts - I've never tried them.


Also, there's scp-only:
https://github.com/scponly/scponly/wiki

Haven't used that in years, either.
Concern over that one seemed to be that it's "another" shell and nobody 
had apparently done a thorough audit of it.