Configuring SSH and initiating SSH session - Router - Cisco Packet tracer

R1(config)#ip domain-name example.com

#configure a domain name of your choice

R1(config)#crypto key generate rsa  

#This is used to generate RSA key pairs for the device.

It will prompt as below to define the size of the key in bits. in this example i have given 1024

 

 

R1(config)#ip ssh version 2    

#enable SSH version 2

R1(config)#username cisco password cisco    

#create local username and password

R1(config)#enable password cisco

#create enable password

Configure the below to allow SSH access to the device

 R1(config)#line vty 0 4

R1(config-line)#transport input ssh    #allow only SSH session

R1(config-line)#login local    #use the local credentials configured