Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 525
Limit concurrent login sessions, Enable login statistics
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Configure user lockout OS10(config)# password-attributes max-retry 4 lockout period 360 Limit concurrent login sessions To avoid an unlimited number of active sessions on a switch for the same user ID, you can limit the number of console and remote connections. Log in from a console connection by cabling a terminal emulator to the console serial port on the switch. Log in to the switch remotely through a virtual terminal line (VTY), such as Telnet and SSH. • Configure the maximum number of concurrent login sessions in CONFIGURATION mode. OS10(config)# login concurrent-session limit number - limit number - Sets the maximum number of concurrent login sessions allowed for a user ID (1 to 12; default 10). When you configure the maximum number of allowed concurrent login sessions, take into account that: • Each remote VTY connection counts as one login session. • All login sessions from a terminal emulator on an attached console count as one session. Configure concurrent login sessions OS10(config)# login concurrent-session limit 4 If you log in to the switch after the maximum number of concurrent sessions are active, an error message displays. To log in to the system, close one of your existing sessions. OS10(config)# login concurrent-session limit 4 Too many logins for 'admin'. Last login: Wed Jan 31 20:37:34 2018 from 10.14.1.213 Connection to 10.11.178.26 closed. Current sessions for user admin: Line Location 2 vty 0 10.14.1.97 3 vty 1 10.14.1.97 4 vty 2 10.14.1.97 5 vty 3 10.14.1.97 Enable login statistics To monitor system security, allow users to view their own login statistics when they sign in to the system. A large number of login failures or an unusual login location may indicate a system hacker. Enable the display of login information after a user successfully logs in; for example: OS10 login: admin Password: Last login: Thu Nov 2 16:02:44 UTC 2017 on ttyS1 Linux OS10 3.16.43 #2 SMP Debian 3.16.43-2+deb8u5 x86_64 ... Time-frame for statistics : 25 days Role changed since last login : false Failures since last login : 0 Failures in time period : 1 Successes in time period : 14 OS10# This feature is available only for the sysadmin and secadmin roles. • Enable the display of login information in CONFIGURATION mode. login-statistics enable To display information about user logins, enter the show login-statistics command. System management 525