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Level 1

28 points

SSH Not Working After Update To 10.13.2 (HighSierra)

After upgrading my High Sierra to version 10.13.2, the ssh client service stopped working, displaying the following error:

"Unable to negotiate with "xxx" port "xxx": no matching cipher found. Their offer: aes128-cbc, 3des-cbc, blowfish-cbc, cast128-cbc, arcfour, aes192-cbc, aes256-cbc, rijndael-cbc @ lysator.liu.se"

Does anyone know how to solve or if it is bug?

iMac, macOS High Sierra (10.13.2), null

Posted on Dec 12, 2017 6:25 AM

Best reply

Bradley Morgan

Level 1

14 points

Posted on Dec 14, 2017 11:10 AM

Yeah, same problem here. For now, you can work around this with ...

ssh -c 3des-cbc <user>@<hostname>

Or by modifying your ~/.ssh/config file with something like...

...

Ciphers 3des-cbc

...

Or, get your server admin to add one of the keys that shows up in ssh -v to the server's sshd_config.

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SSH Not Working After Update To 10.13.2 (HighSierra)

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