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SSH security improvements: Difference between revisions
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m
note that this is per machine-client, not per user or server
m (add reference at top, to basic ssh page.) |
m (note that this is per machine-client, not per user or server) |
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This warning is displayed because the host keys on the cluster (in this case [[Graham]]) were changed, and your SSH client software remembers the old host keys. (It does this to prevent [https://en.wikipedia.org/wiki/Man-in-the-middle_attack "man-in-the-middle" attacks].) | This warning is displayed because the host keys on the cluster (in this case [[Graham]]) were changed, and your SSH client software remembers the old host keys. (It does this to prevent [https://en.wikipedia.org/wiki/Man-in-the-middle_attack "man-in-the-middle" attacks].) This will happen for your SSH client on each device from which you connect (so you may see it multiple times). | ||
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ssh-keygen -R graham.computecanada.ca | ssh-keygen -R graham.computecanada.ca | ||
ssh-keygen -R cedar.computecanada.ca | ssh-keygen -R cedar.computecanada.ca | ||
ssh-keygen -R beluga.computecanada.ca | ssh-keygen -R beluga.computecanada.ca | ||