It is quite easy to reset your user password in ubuntu if you have physical
access to the machine. See https://help.ubuntu.com/community/LostPassword. This
is why I wanted to encrypt the ssh keys. That way if someone resets the
password they can't access the keys.
On Thursday, 28 July 2016, 14:23, Bowie Bailey <bowie_bai...@buc.com> wrote:
"if someone had physical access to backuppc server they could easily logon as
backuppc user by resetting the password"
How would that work? Unless you leave the backuppc user logged in, they would
still need to either know the password or use some sort of hack to get access
before being able to reset the password (such as rebooting with a live cd and
accessing the OS partition directly).
Always protect physical access to important computers. If someone has
physical access to your server, all bets are off. Also, if a user account has
passwordless ssh keys giving root access to any of your systems, then you
should make sure that the account has a strong password (at the least), or that
the ssh keys that give access do require (strong) passwords.
Bowie
On 7/28/2016 9:01 AM, lanceh1412-busin...@yahoo.co.uk wrote:
I hadn't really thought about the danger from a restore. I guess that would
require quite a bit of technical knowledge of backuppc to engineer an attack on
a server? It would require significantly less knowledge to steal the ssh keys
on an unencrypted server and then have root access.
On Thursday, 28 July 2016, 13:11, Carl Wilhelm Soderstrom
<chr...@real-time.com> wrote:
On 07/28 10:53 , lanceh1412-busin...@yahoo.co.uk wrote:
> Just trying to harden security. My concern is if someone had physical access
> to backuppc server they could easily logon as backuppc user by resetting the
> password and therefore gain access to the ssh keys. Now I see it is possible
> to put the ssh keys in an encrypted private directory (See
> EncryptedPrivateDirectory - Community Help Wiki). This would mean that even
> if someone could reset the password and logon as backuppc they wouldn't have
> access to the keys.
> Has anyone done this or would recommend this way or got any other
> suggestions?
My logic for my setup is:
if someone has access to the BackupPC server, they have all the data on all
the computers being backed up. At that point, the risk is whether they could
modify data on the live server.
To avoid that risk, I don't allow the BackupPC server write access to the
machines being backed up, only read access. The restores aren't really much
more inconvenient (I tend to use tar+netcat for restores on Linux boxen, and
zipfile downloads on Windows boxen), and I feel like I have more confidence
that I'm not going to accidentally clobber the wrong data.
--
Carl Soderstrom
Systems Administrator
Real-Time Enterprises
www.real-time.com
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