• ssh

ssh

Links Linux/AddSshUserKeyOnly , Cisco/SshLogin , /Linux/Security/LoginHistory

ssh to old servers with unsecure ciphers

• error received

  Unable to negotiate with 10.10.10.1 port 22: no matching cipher found. Their offer: aes256-cbc,aes128-cbc,3des-cbc

• Set key exchange

  ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 user@legacyhost
  # or in config
      KexAlgorithms +diffie-hellman-group1-sha1

List supported settings

• add -G to command line to see active setting

• for available settings

  ssh -Q cipher       # List supported ciphers
  ssh -Q mac          # List supported MACs
  ssh -Q key          # List supported public key types
  ssh -Q kex          # List supported key exchange algorithms