No matching cipher found:

Hello everyone/@kbogart-81b6c89deee9,

I get this error on my switch log, I have couple of users logging in regularly.

64529: No matching cipher found: client,,aes128-ctr,aes192-ctr,aes256-ctr server aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc

One research showed client is using aes128-ctr while the server is aes128-cbc, and causing a mismatch.

Kindy help for possible solutions.


This thread on Reddit might help shed some light on this problem:

In short, it looks like whatever users are utilizing OpenSSH to gain SSH access into your switch need to modify their /etc/ssh/sshd_config file. Most likely they’ll need to manually add AES128-CBC to their file.
Hope that helps!

thanks for the awesome information.