MID Server SSH cryptographic algorithms

  • Rversion finale: Australia
  • Mis à jour 12 mars 2026
  • 2 minutes de lecture

    • The MID Server utilizes SSH clients to perform many discovery actions. During the SSH handshake, both the client and server first determine which algorithms both parties support, then client picks the highest priority algorithm. For the Host Key Algorithm, the client picks highest priority algorithm which both parties support that matches the key type.

    Set-up indicator for security phaseEnsure that the MID Server can connect to elements inside and outside your networkDownload and install the MID Server on a Linux or Windows hostConfigure your MID ServerConfigure MID Server securityEnsure that the MID Server can connect to elements inside and outside your networkDownload and install the MID Server on a Linux or Windows hostConfigure your MID ServerConfigure MID Server security

    Default supported SSH algorithms by priority

    Key Exchange Algorithm​
    1. ecdh-sha2-nistp256
    2. ecdh-sha2-nistp384​
    3. ecdh-sha2-nistp521​
    4. diffie-hellman-group-exchange-sha256​
    5. diffie-hellman-group14-sha256​
    6. diffie-hellman-group16-sha512​
    7. diffie-hellman-group14-sha1​
    8. diffie-hellman-group1-sha1​
    9. diffie-hellman-group-exchange-sha1
    Host Key Algorithm​ (used for public key signature during authentication)
    1. ssh-ed25519-cert-v01@openssh.com
    2. rsa-sha2-512-cert-v01@openssh.com
    3. rsa-sha2-256-cert-v01@openssh.com
    4. ssh-ed25519
    5. ecdsa-sha2-nistp256
    6. ecdsa-sha2-nistp384
    7. ecdsa-sha2-nistp521
    8. rsa-sha2-512
    9. rsa-sha2-256
    10. ssh-rsa-cert-v01@openssh.com
    11. ssh-rsa
    12. ssh-dss
    Cipher Algorithm​
    1. aes128-ctr​
    2. aes192-ctr​
    3. aes256-ctr​
    4. aes128-cbc​
    5. aes192-cbc​
    6. aes256-cbc​
    MAC Algorithm
    1. hmac-sha2-256​
    2. hmac-sha1​
    3. hmac-sha2-512​
    4. hmac-sha1-96​
    5. hmac-md5-96​
    6. hmac-md5
    ​

    Customize the SSH algorithms priority list

    The MID Server SSH algorithm priorities can be customized based on security needs. Each algorithm is controlled by one of the following MID Server properties.

    Remarque :
    Glide Import on the instance uses the default algorithm list. The four MID Server properties do not affect Glide Import because it is not run on the MID server. SNCSSH is used for Glide Import on instance for SFTP and SCP.

    • Key Exchange algorithms: mid.ssh.algorithms.kex​

    • Host Key algorithms: mid.ssh.algorithms.host_key​

    • Cipher algorithms: mid.ssh.algorithms.cipher​

    • MAC algorithms: mid.ssh.algorithms.mac​

    The properties accept comma separated lists with operators. The first name in the list is highest priority, last name in list is lowest priority. Adding a comma separated list without any operators replaces the default algorithm list. The following operators are based on the OpenSSH standard syntax and modify the algorithm priority list.
    • The + operator appends the comma separated list of algorithms to the default algorithm list.
    • The - operator removes the comma separated list of algorithms from the default algorithm list.
    • The ^ operator places the comma separated list of algorithms at the front of the default algorithm list.
    The MID Server properties using the operators to customize the SSH algorithm lists.