Re: Why Disable Root ssh login?
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On Fri, Dec 15, 2006 at 08:38:51AM -0600, Jacques Normand wrote:
> On Fri, Dec 15, 2006 at 03:09:54PM +0100, Olive wrote:
> > >Well, if sudo is well configured, it does not give complete root access,
> > >It should be limited to mostly inoffensive command options and require
> > >the password for the rest. As for the logs, you are right in the case
> > >where they are kept local, but any reasonable size network will use a
> > >separate node with a different password as a loghost. All the failed
> > >attempt will be sent there and recorded before any successful promotion.
> > >Those will be much harder to erase. But you are right I should have
> > >mentioned it.
> >
> >
> > This make more sense, but still I am perplex. I was speaking about the
> > "Unbuntu" type of sudo account: you have to give your own password to
> > have root access, not a different one. If an offender had succeed to log
> > in, he has already the normal user account password. For the logs, if
> > the local system is able to send some log to another network, a user
> > having root access is also able too; how can the local system be
> > "authorized" to send remote log across the network and denying this to a
> > user having rootlocal access. Even if there is a password to send the
> > logs over the network, the system must store it somewhere in order to be
> > able to use it. A user having local root access is able to analyse
> > /dev/mem to discover it. It may present some difficulties but this seems
> > like "security by obscurity"; which is known to be bad. However, a more
> > secure variant would be to authorize the system to send log but not to
> > clear it; in this later case it could be more secure. Anyway just
> > prevent a root ssh does not increase security as it; it only does in
> > conjunction with several other steps.
>
> This way to setup sudo does not make sense to me. It is giving full root
> access to every user, which is plain bad. It must be a configuration for
> single workstation used by one person only.
well, not exactly...
normally, that kind of access ist set up only for certain groups...
(i do not use ubuntu, but it is that way on for example osx, where there
is a special admin group that allows sudo of all commands after password
prompt. of course, maybe you should not use such an account for daily
work as you shouldn't do that with the root account...)
yours
albert
- --
Albert Dengg <a_d@gmx.at>
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