Ludwig Krispenz wrote:
Hi,
please review the following feature design. It introduces a global
account lockout, while trying to keep the replication traffic minimal.
In my opinion for a real global account lockout the basic lockout
attributes have to be replicated otherwise the benefit is minimal: an
attacker could perform (maxFailedcount -1) login attempts on every
server before the global lockout is set. But the design page describes
how it could be done if it should be implemented - maybe the side effect
that accounts could the be unlocked on any replica has its own benefit.
http://www.freeipa.org/page/V4/Replicated_lockout
One weakness with this is there is still a window for extra password
attempts if one is clever, (m * (f-1))+1 to be exact, where m is the
number of masters and f is the # of allowed failed logins.
rob
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