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Unable to negotiate: no matching key exchange method found.

Published on November 12, 2024

Some ssh clients may complain with: “Unable to negotiate with 134.117.xxx.xxx port 22: no matching key exchange method found.” The connect as follows:

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1

Replace access.scs.carleton.ca with your destination host.