SRG-OS-000021-GPOS-00005
The operating system must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period.
Canonical Source
SV-203594r958388_rule ( from General Purpose Operating System Security Requirements Guide )Description
By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.