SSH: Difference between revisions

SSH (view source)

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link to 'SSH security improvements'

Bureaucrats, cc_docs_admin, cc_staff

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-The last of these error messages can point to a man-in-the-middle attack, or to an upgrade of security of the cluster you are trying to connect to (in the latter case, you might have been informed already). One such upgrade occurred on the Niagara cluster on May 31, 2019.  See [https://docs.scinet.utoronto.ca/index.php/SSH_Changes_in_May_2019 this page] for the one-time action required from users after the security upgrade.
+The last of these error messages can point to a man-in-the-middle attack, or to an upgrade of security of the cluster you are trying to connect to.
+If you get this, verify that the host key mentioned in the message matches one of the host keys published at [[SSH host keys]].
+If it does, it is safe to continue connecting.  If the host key does not appear on our published list, terminate the connection and [[Technical support|contact support]].
+One such upgrade occurred on the Niagara cluster on May 31, 2019.  See [https://docs.scinet.utoronto.ca/index.php/SSH_Changes_in_May_2019 this page] for the one-time action required from users after the security upgrade.  Further upgrades of this type are expected on all clusters in late September/October 2019; see [[SSH security improvements]] for more information.
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