Limit logins on a group of machines?

[Stephen]

this is kind of where an LDAP server comes in to play, then you cna
restrict number of concurrent logins across the network.

On Wed, Jun 17, 2009 at 10:58 AM, Bill Jonas<bill at billjonas.com> wrote:
> Hi all,
>
> I was wondering if anybody might point me in the right direction here.
> I know that for limiting concurrent logins on a *single* machine,
> you can set "maxlogins" in /etc/security/limits.conf.
>
> However, this is only good for that single system.  Suppose you have
> three machines (foo, bar, and baz), and you wish to restrict the number
> of total logins across all three servers.  For example, you wish to
> specify that a user may only log in once, total, on this set of systems.
>
> I've searched Google with very little luck.  Most of the results are
> either about limits.conf, limiting concurrent logins on a Windows
> domain (yes, even with search terms of 'linux limit concurrent network
> logins' and the like), or are otherwise irrelevant.
>
> Can anyone provide any clues, point me in the right direction, or at
> least let me know I'll have to hack something together with finger,
> rwho, and/or a custom PAM module? :)
>
> Thanks!
>
> --
> Bill Jonas    *    bill at billjonas.com    *    http://www.billjonas.com/
> "It's a dangerous business, Frodo, going out your front door.  You step
> into the Road,  and if you don't keep your feet,  there  is  no knowing
> where you might be swept off to."  --  Bilbo Baggins
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-- 
A mouse trap, placed on top of your alarm clock, will prevent you from
rolling over and going back to sleep after you hit the snooze button.

Stephen