First, if SSH v1 was initially configured on the firewall, then all SSH keys from version 1 must be deleted.
This can be done using the command “delete ssh device all”.
ns-> delete ssh device all
SSH disabled for vsys: 1
PKA keys deleted from device: 0
Host keys deleted from device: 1
Execute the ‘set ssh version v2’ command to activate SSH v2 for the device.
ns5-> set ssh version v2
SSH version 2 has been activated.
Then, enable SSH:
ns-> set ssh enable
View the SSH configurations settings with the command ‘get ssh’. Note that it should report it is ‘active’ and ‘enabled’:
ns-> get ssh
SSH V2 is active
SSH is enabled
SSH is ready for connections
Maximum sessions: 3
Active sessions: 1
Admin Ip Addr Vsys Auth Method Service
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Enable SSH on the interface(s) on which the SSH client will connect:
ns-> set int