security ssh remove

Remove SSH configuration options

Availability: This command is available to cluster and Vserver administrators at the admin privilege level.

Description

The security ssh remove command removes the specified SSH key exchange algorithms or ciphers from the existing configurations of the cluster or a Vserver. The removed algorithms or ciphers are disabled on the cluster or Vserver. If you changed the cluster configuration settings, it will be is used as the default for all newly created Vservers. If the SSH key exchange algorithms or ciphers that you specify with this command are not currently enabled, the command will notdoes not fail. Data ONTAP supports the diffie-hellman-group-exchange-sha256 key exchange algorithm for SHA-2. Data ONTAP also supports the diffie-hellman-group-exchange-sha1, diffie-hellman-group14-sha1, and diffie-hellman-group1-sha1 SSH key exchange algorithms for SHA-1. The SHA-2 key exchange algorithm is more secure than the SHA-1 key exchange algorithms. Data ONTAP also supports ecdh-sha2-nistp256, ecdh-sha2-nistp384, ecdh-sha2-nistp521, and curve25519-sha256. Data ONTAP also supports the AES and 3DES symmetric encryption (also known as ciphers) of the following types: aes256-ctr, aes192-ctr, aes128-ctr, aes256-cbc, aes192-cbc, aes128-cbc, aes128-gcm, aes256-gcm and 3des-cbc. Data ONTAP supports MAC algorithms of the following types: hmac-sha1, hmac-sha1-96, hmac-md5, hmac-md5-96, hmac-ripemd160, umac-64, umac-64, umac-128, hmac-sha2-256, hmac-sha2-512, hmac-sha1-etm, hmac-sha1-96-etm, hmac-sha2-256-etm, hmac-sha2-512-etm, hmac-md5-etm, hmac-md5-96-etm, hmac-ripemd160-etm, umac-64-etm, and umac-128-etm.

Parameters

-vserver <Vserver Name> - Vserver
Identifies the Vserver from which you want to remove the SSH key exchange algorithms or ciphers.
[-key-exchange-algorithms <algorithm name>, ...] - List of SSH Key Exchange Algorithms to Remove
Removes the specified key exchange algorithm or algorithms from the Vserver.
[-ciphers <cipher name>, ...] - List of SSH Ciphers to Remove
Removes the specified cipher or ciphers from the Vserver.
[-mac-algorithms <MAC name>, ...] - List of SSH MAC algorithms to Remove
Removes the specified MAC algorithm or algorithms from the Vserver.

Examples

The following command removes the diffie-hellman-group1-sha1 and diffie-hellman-group-exchange-sha1 key exchange algorithms from the cluster1 Vserver. It also removes the aes128-cbc and 3des-cbc ciphers and the hmac-sha1-96 and hmac-sha2-256 MAC algorithms from the cluster1 Vserver.
cluster1::> security ssh remove -vserver cluster1 -key-exchange-algorithms diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1 -ciphers aes128-cbc,3des-cbc -mac-algorithms hmac-sha1-96,hmac-sha2-256