![]() ![]() we take hmac-sha2-512 from the error message and try to connect, and it will be connected $ ssh -m hmac-sha2-512 -A Īnother variant of the problem is the mismatch in cipher which looks like below $ ssh -A To see this run in command line on your machine $ ssh -Q mac # output would be something now in order to connect to target server with their choice of mac which your server doesn't support you have to explicitly provide one of the mac supported by target server. Their root cause of this error is on your source machine the supported MAC doesnt contain the MAC from target server. Unable to negotiate with XX.XX.XX.XX port 1234: no matching MAC found. I was trying to ssh to a target server and getting error like below $ ssh -A Sharing the experience so it can help someone. I have struggled to this problem for decent time before understanding the basics and root cause.
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