HP 8/40 Brocade Fabric OS Administrator's Guide v6.3.0 (53-1001336-01, July 20 - Page 122
Enabling the admin lockout policy, Unlocking an account, Denial of service implications
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5 Password policies • userConfig --change account_name -u • passwdCfg --disableadminlockout Note that the account-locked state is distinct from the account-disabled state. Use the following attributes to set the account lockout policy: • LockoutThreshold Specifies the number of times a user can attempt to log in using an incorrect password before the account is locked. The number of failed login attempts is counted from the last successful login. LockoutThreshold values range from 0 to 999, and the default value is 0. Setting the value to 0 disables the lockout mechanism. • LockoutDuration Specifies the time, in minutes, after which a previously locked account is automatically unlocked. LockoutDuration values range from 0 to 99999, and the default value is 30. Setting the value to 0 disables lockout duration, and would require a user to seek administrative action to unlock the account. The lockout duration begins with the first login attempt after the LockoutThreshold has been reached. Subsequent failed login attempts do not extend the lockout period. Enabling the admin lockout policy 1. Log in to the switch using an account that is an Admin role or securityAdmin role. 2. Enter the passwdCfg --enableadminlockout command. Unlocking an account 1. Log in to the switch using an account that is an Admin role or securityAdmin role. 2. Enter the userConfig --change account_name -u command specifying the name of the user account that is locked out. Disabling the admin lockout policy 1. Log in to the switch using an account that is an Admin role or securityAdmin role. 2. Enter the passwdCfg --disableadminlockout command. Denial of service implications The account lockout mechanism may be used to create a denial of service condition by repeatedly attempting to log in to an account using an incorrect password. Selected privileged accounts are exempted from the account lockout policy to prevent them from being locked out from a denial of service attack. However these privileged accounts may then become the target of password guessing attacks. Audit logs should be examined to monitor if such attacks are attempted. 80 Fabric OS Administrator's Guide 53-1001336-01
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