Resolving SSH Key Exchange Algorithm Mismatch in AAP for ASA Devices

Solution Verified - Updated -

Issue

  • After upgrading to Ansible Automation Platform 2.*, users encounter SSH connection failures when attempting to use the asa_command module for ASA devices.

  • The connection attempt terminates unsuccessfully, with an error message below indicating a failure in the SSH connection process.

    ...
    changed": false,
      "module_stderr": "ssh connection failed: ssh connect failed: kex error : no match for method kex algos: server [diffie-hellman-group1-sha1], client [curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1]",
      "module_stdout": "",
      "msg": "MODULE FAILURE\\nSee stdout/stderr for the exact error"
    ...
    

Environment

  • Ansible Automation Platform 2.*

  • ASA devices configured to use diffie-hellman-group1-sha1 for SSH key exchange

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