The default virtual terminal configuration allows for 5 simultaneous user sessions.
line vty 0 4
The default SSH server parameters do not have a simultaneous session limit, but there is a parameter limiting the number of simultaneous SSH login attempts awaiting authentication—Maximum Startups.
awplus#show ssh server
Secure Shell Server Configuration
------------------------------------------------------------
SSH Server : Enabled
Protocol : IPv4,IPv6
Port : 22
Version : 2,1
Services : scp, sftp
User Authentication : publickey, password
Resolve Hosts : Disabled
Session Timeout : 0 (Off)
Login Timeout : 60 seconds
Maximum Startups : 10
Debug : NONE
Modifying SSH server parameters:
awplus(config)#ssh server v2only
awplus(config)#ssh server session-timeout 1200
awplus(config)#ssh server max-startups 5
awplus(config)#ssh server login-timeout 5
awplus#sho ssh server
Secure Shell Server Configuration
------------------------------------------------------------
SSH Server : Enabled
Protocol : IPv4,IPv6
Port : 22
Version : 2 ----------------------------- more secure, no real need to use v.1
Services : scp, sftp
User Authentication : publickey, password
Resolve Hosts : Disabled
Session Timeout : 1200 seconds ------------- enable automatic termination of idle
Authenticated sessions
Login Timeout : 5 seconds ----------------- minimize how long an individual login
attempt can tie up SSH resources
Maximum Startups : 5 ------------------------------ set the number of concurrent login attempts
consistent with the number of VTY sessions
Debug : NONE
Set the VTY interface to have a session timeout consistent with the SSH service, then cleared all sessions to make all configuration updates effective.
awplus(config)#line vty 0 4
awplus(config-line)#exec-timeout 20 [minutes]
% The new exec-timeout settings will apply to new sessions only
awplus(config-line)#exit
awplus(config)#exit
awplus#clear ssh all
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