Couldn't Agree A Key Exchange Algorithm

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Couldn't Agree A Key Exchange Algorithm Ssh

Fatal error: couldn

Given that on your PC you are getting that response then you are talking to the sshd, the daemon on the RPi - it just doesn't like how you are talking to it! 8-) For some reason Putty on the Windoze PC and that daemon cannot agree on how to encrypt the communications - so one of them is setting the bar too high for the other to get over - if you haven't fiddled with the settings on the RPi then I guess you need to check the encryption options on Putty (and that you are using ssh and not the insecure rlogin or telnet which I think Putty might be able to talk with as well IIRC!)–Feb 19 '16 at 4:49. For SecureCRT and other SSH clients you can add the following line to your /etc/ssh/sshdconfigCiphers 3des-cbc,blowfish-cbc,cast128-cbc,arcfour,arcfour128,arcfour256,aes128-cbc,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com.It shoud all be on the same line without line breaks.Then restart the SSH daemon using sudo /etc/init.d/ssh restartNote, that those ciphers are old and not very secured. It is recommanded to update your client and avoid them, especially if you're on a public network.

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