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Verify SSH host key algorithm support before ONTAP upgrade

Contributors netapp-aherbin netapp-ahibbard netapp-forry
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Before you upgrade ONTAP, if SSL FIPS mode is enabled on a cluster where administrator accounts authenticate with an SSH public key, you must ensure that the host key algorithm is supported on the target ONTAP release.

The following table indicates host key type algorithms that are supported for ONTAP SSH connections. These key types do not apply to configuring SSH public authentication.

ONTAP release

Key types supported in FIPS mode

Key types supported in non-FIPS mode

9.11.1 and later

ecdsa-sha2-nistp256

ecdsa-sha2-nistp256
rsa-sha2-512
rsa-sha2-256
ssh-ed25519
ssh-dss
ssh-rsa

9.10.1 and earlier

ecdsa-sha2-nistp256
ssh-ed25519

ecdsa-sha2-nistp256
ssh-ed25519
ssh-dss
ssh-rsa
Note Support for the ssh-ed25519 host key algorithm is removed beginning with ONTAP 9.11.1.

For more information, see Configure network security using FIPS.

Existing SSH public key accounts without the supported key algorithms must be reconfigured with a supported key type before upgrading or administrator authentication will fail.

Learn more about enabling SSH public key accounts.