Solution: Update Putty.
The official download address: https://www.ssh.com/ssh/putty.
Saturday, 30 October 2021 21:31
Solve Putty error “Couldn’t agree a key exchange algorithm”
Written by CNERIS.COMProblem: Using Putty SSH to log in some hosts, I got “Couldn’t agree a key exchange algorithm (available: This email address is being protected from spambots. You need JavaScript enabled to view it., ECDH-sha2-nistp521, ECDH-sha2-nistp384, ECDH-sha2-nistp256)”.
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