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  • Q: When i try to ssh into (router|switch) i get the message. Unable to negotiate with x.x.x.x port 22: no matching key exchange found. Their offer diffie-hellman-group1-sha1
  • A: edit /etc/ssh/ssh_config and uncomment
    • # MACs hmac-md5,hmac-sha1,hmac-sha2-256,,hmac-ripemd160
    • # Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc
    • and add these next few lines.
    • HostkeyAlgorithms ssh-dss,ssh-rsa
    • KexAlgorithms +diffie-hellman-group1-sha1
    • Then you should be able to access the (switch|router) as you would over serial.