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SSH security improvements: Difference between revisions
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The first time you login to a Compute Canada cluster after the changes, you will probably see a warning message like the following: | The first time you login to a Compute Canada cluster after the changes, you will probably see a warning message like the following: | ||
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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 will happen for your SSH client on each device from which you connect, so you may see it multiple times. | 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. | ||