Account lockout is a basic mechanism which protects passwords against brute-force attacks. After each failed login attempt a failed login counter is incremented by one. Once the counter reaches
10 by default) the account is locked and all further login attempts (with valid password or not) in the next 15 minutes will result in login failure. This period can be configured by
lockoutDuration property. The account lockout can be disabled by setting
The counter is reset after successful login or after a time period following last login attempt. This value can be configured by setting
resetCounterPeriod property. This value is auto-set to
lockoutDuration if not set explicitly and must always be greater or equal to
A user account can be manually locked to disable user login. The account can be locked and be unlocked only for a period of time when it is needed. It is useful for example for an administrators account which is needed once in a while.
Manual lockout can be done either using Rebex Buru SFTP Server Web Administration or
burusftp user update <username> --lock command:
# lock user indefinitely burusftp user update <username> --lock # lock user for 10 days burusftp user update <username> --lock 10d # compound values can be used burusftp user update <username> --lock "10d 5h 30m" # lock user until specified date burusftp user update <username> --lock 2050-12-31 # time can also be added burusftp user update <username> --lock "2050-12-31 13:00"
Users can be manually unlocked either using Rebex Buru SFTP Server Web Administration or using command line:
# unlock user burusftp user update <username> --unlock
Account lockout (manual or via failed login counter) is shared with both Rebex Buru SFTP Server and Rebex Buru SFTP Server Web Administration.
See also configuration file manual and command line manpage.