Given the available options I would vote for allowing no-password logons
to Linux via the console. Because:              

- Recording passwords is bad policy. Anyone who sees a console or
console listing can then use the discovered passwords elsewhere.

- Depending on keyboard mapping and special characters used (# ^ [ ]),
logon to Linux becomes difficult or impossible via the 3215.

- Access to the console can (should!) be restricted by regular VM
security or ESM, the only possible problem being that some sites require
>8 character upper-lower case passwords for their UNIX-type systems.



Ray Mrohs
U.S. Department of Justice
202-307-6896


> 1) For Linux on Z, there is no legitimate reason to be using
> the console
> for anything but emergencies that have broken network access to the
> guest. ssh with keyrings and sudo are for normal maintenance and
> operations access. If the server is so horked that you need
> the console,
> you DEFINITELY don't want J Random Luser messing with it. In that
> scenario, the people who will be working at the console
> already HAVE the
> root password or an equivalent security token and can do as
> much damage
> as they like. You aren't improving the security of things any by
> requiring the extra login at the console.
>
> 2) You have a authentication method as strong as the Unix
> login already
> in place (the VM userid login), assuming that you have decent password
> policies in place already for the VM side (and if not, why not?).
>
> 3) You can audit the living heck out of the VM login with an ESM, and
> even without one, CP does some fairly decent logging that's really,
> REALLY hard to circumvent.
>
> 4) LOGONBY can be selective -- no need to give them access to
> *everything*.
>
> I guess I'm more confident in the VM side of the world and the audit
> capabilities there. I think I'd be able to make the case to an hostile
> auditor.

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