Re: Shared memory DoS's (Redhat retraction)

[Wietse Venema]

Mike Perry:
[setting resource limits at login time]

This is UNIX, so there are other ways to run a command than by
confronting the login prompt. If you are concerned about abuse of
resources by untrusted users you will not only have to deal with
resource limits in login sessions, but also in processes that are
run spontaneously, such as by cron and by mail delivery systems.

        Wietse