Configure SSH on Cisco IOS

This should also work for IOS-XE.

aaa new-model is necessary for the login default line under the vty.

Config

aaa new-model
!
username ariadne secret passwordgoeshere
!
ip domain-name <domain-here>
!
crypto key generate rsa modulus 4096
!
ip ssh version 2
!
line vty 0 15
  transport input ssh
  login authentication default

Verification

R2# ssh -l ariadne 10.0.0.1

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Password: 

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R1>