Re: Fedora 31 System-Wide Change proposal: Disable Root Password Login in SSH

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On Fri, May 17, 2019 at 4:35 PM Kevin Fenzi <kevin@xxxxxxxxx> wrote:
>
> On 5/17/19 5:23 AM, Stephen Gallagher wrote:
>
> ...snip...
>
> > 3) Force Anaconda to require the creation of a non-root user that is a
> > member of the `wheel` group, so that this user can be used to SSH in
> > and administer the system. Essentially, remove the root user creation
> > spoke as an option from the interactive install.
>
> So, this is basically the old cloud-init makes a user that can sudo to
> root thing. Can anyone explain in small words how this is more secure?
>

This is not "force Anaconda to create a specific user", it's "the
interactive dialog won't complete the installation without you
selecting a non-root administrative user of your choice".

It's more secure in that a non-well-known username is less prone to
being vulnerable to automated attacks.

> I mean, in this case the attacker would need to guess the username in
> addition to the password (where in the cloud cause this is known), but
> otherwise why not just keep root password access ?
>

Guessing the username is *hard*. It's not something an average script
will do. It protects against casual attacks. Yes, it isn't necessarily
helping against targeted attacks, but those are an entirely different
ball of wax.

> I always found that cloud default anoying and useless and haven't yet
> seen a good argument to not do it.
>
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