Dell MX9116n EMC SmartFabric OS10 User Guide Release 10.5.0 - Page 1009

Limit concurrent login session commands login concurrent-session limit Configures the maximum number of concurrent login sessions allowed for a user ID. Syntax login concurrent-session limit number Parameters limit number - Enter the limit of concurrent login sessions, from 1 to 12. Default 10 concurrent login sessions Command Mode CONFIGURATION Usage Information The total number of concurrent login sessions for the same user ID includes all console and remote connections, where: • Each remote VTY connection counts as one login session. • All login sessions from a terminal emulator on an attached console count as one session. The no version of the command disables the configured number of allowed login sessions. Example OS10(config)# login concurrent-session limit 7 Supported Releases 10.4.1.0 or later Virtual terminal line ACLs To limit Telnet and SSH connections to the switch, apply access lists on a virtual terminal line (VTY). There is no implicit deny rule. If none of the configured conditions match, the default behavior is to permit. If you need to deny traffic that does not match any of the configured conditions, explicitly configure a deny statement. 1. Create IPv4 or IPv6 access lists with permit or deny filters; for example: OS10(config)# ip access-list permit10 OS10(config-ipv4-acl)# permit ip 172.16.0.0 255.255.0.0 any OS10(config-ipv4-acl)# exit OS10(config)# 2. Enter VTY mode using the line vty command in CONFIGURATION mode. OS10(config)# line vty OS10(config-line-vty)# 3. Apply the access lists to the VTY line with the {ip | ipv6} access-class access-list-name command in LINE-VTY mode. OS10(config-line-vty)# ip access-class permit10 View VTY ACL configuration OS10(config-line-vty)# show configuration ! line vty ip access-class permit10 ipv6 access-class deny10 OS10(config-line-vty)# Security 1009