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Try this:
Cisco Asa Ssh Crypto Key Generate Code
Config t crypto key generate rsa exit Then ssh to the router and complete the config. Or just enable telnet if you can get away with it. Config t vty 0 4 transport input ssh telnet exit I have a perl script that does this to reset enable passwords. May 20, 2014 Author, teacher, and talk show host Robert McMillen shows you how to use the Cisco ASA version 9 generate RSA keys command. Oct 02, 2015 SSH Config and crypto key generate RSA command. Use this command to generate RSA key pairs for your Cisco device (such as a router). Keys are generated in pairs–one public RSA key and one private RSA key. If your router already has RSA keys when you issue this command, you will be warned and prompted to replace the existing keys.
username <USERNAME> password <PASSWORD> encrypted privilege 15
!
crypto key generate rsa modulus <<MODULUS_SIZE>
ssh version 2
!
ssh <IPADDRESS_SUBNET_MASK> <INTERFACE>
!
!
crypto key generate rsa modulus <<MODULUS_SIZE>
ssh version 2
!
ssh <IPADDRESS_SUBNET_MASK> <INTERFACE>
!
# So here's an example.
username admin password Cisco123 encrypted privilege 15
!
crypto key generate rsa modulus 1024
!
ssh 192.168.0.0 255.255.255.0 INSIDE
ssh version 2
!
username admin password Cisco123 encrypted privilege 15
!
crypto key generate rsa modulus 1024
!
ssh 192.168.0.0 255.255.255.0 INSIDE
ssh version 2
!
So to explain, create a local user (you can create multiple accounts), please try not to use admin as it's guessable!.
Generate the actual key the client will use to SSH server.
Tell the ASA from what IP address range SSH sessions can be opened from and on which interface, again you can one for the inside, outside or any other interface you have set up.
Crypto Ssh Cisco
Tell the ASA to use SSH version 2.