Dell PowerSwitch S4128F-ON EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 1008

Default The default SSH public keys are an RSA key generated using 2048 bits, an ECDSA key with 256 bits, and an Ed2559 key with 256 bits. Command Mode CONFIGURATION Usage Information Before you use the command, locate the public keys on a remote client in the ~/.ssh/id_rsa.pub file. Create a text file and copy the SSH public keys on the remote client into the file. Enter each public key on a separate line. Download the file to your home OS10 directory. NOTE: Entering the command when an SSH key file is not present has no effect and results in a silent failure. SSH password-less login is not enabled. Supported on the MX9116n and MX5108n switches in Full Switch mode starting in release 10.4.1.0. Also supported in SmartFabric mode starting in release 10.5.0.1. The no version of the command removes the SSH password-less configuration for the specified user name. Example OS10(config)# username user10 sshkey filename /test_file.txt OS10(config)# do show running-configuration users username admin password $6$q9QBeYjZ$jfxzVqGhkxX3smxJSH9DDz7/3OJc6m5wjF8nnLD 7/VKx8SloIhp4NoGZs0I/UNwh8WVuxwfd9q4pWIgNs5BKH. role sysadmin username user10 password $6$rounds=656000$G10VRFTJB291ekwo$iTGf0zd4bTUcBBpI Vsbr6oStnUZMydN5lDs4WE6G3XHEtWbcKrGTeAo1wEF0cenEgRRPzi3SMmYyzAHCCC8wS0 role sysadmin username user10 sshkey filename /test_file.txt Supported Releases 10.4.1.0 or later Limit concurrent login sessions To avoid an unlimited number of active sessions on a switch for the same user ID, 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, 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, from 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 1008 Security