Difference between revisions of "Host keys for Euler login nodes"
From ScientificComputing
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==Currently valid keys== | ==Currently valid keys== | ||
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The MD5 and SHA256 fingerprints of the login nodes' ED25519 and RSA keys are: | The MD5 and SHA256 fingerprints of the login nodes' ED25519 and RSA keys are: | ||
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SHA256:Em+yWIT+FDHy7kfQ9IIgdDiF2d8Q8ul36LPSjRv0yz4 | SHA256:Em+yWIT+FDHy7kfQ9IIgdDiF2d8Q8ul36LPSjRv0yz4 | ||
MD5:4f:07:8a:47:a5:bf:c5:22:35:36:79:22:0b:36:d8:60 | MD5:4f:07:8a:47:a5:bf:c5:22:35:36:79:22:0b:36:d8:60 | ||
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==How to remove the old key and add the new one== | ==How to remove the old key and add the new one== | ||
Revision as of 11:08, 2 June 2020
Contents
Introduction
When we replace the login nodes, the host keys will change, therefore upon next login you will receive a message
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed. The fingerprint for the RSA key sent by the remote host is SHA256:qdZ/jPc7HODpO2BmCtJxO51jFZVt1t6fjjbtiUAZemI. Please contact your system administrator. Add correct host key in /path/to/your/home/.ssh/known_hosts to get rid of this message. Offending RSA key in /path/to/your/home/.ssh/known_hosts:252 RSA host key for euler.ethz.ch has changed and you have requested strict checking. Host key verification failed.
Currently valid keys
The MD5 and SHA256 fingerprints of the login nodes' ED25519 and RSA keys are:
ED25519:
SHA256:ontwFjITBT9rYE+4QnoN8272Q47W6OGOd5dwFfBivZ0 MD5:96:0b:48:81:89:18:d1:22:0d:e5:e0:17:7d:d9:02:d2
ECDSA:
SHA256:QpLAVp8eBluW+PU+keL3YkZr0ggU/B8wYtRp2KMuEXo MD5:56:98:04:dd:13:00:c6:62:63:95:dc:a4:c6:b0:e7:bb
RSA:
SHA256:Em+yWIT+FDHy7kfQ9IIgdDiF2d8Q8ul36LPSjRv0yz4 MD5:4f:07:8a:47:a5:bf:c5:22:35:36:79:22:0b:36:d8:60
How to remove the old key and add the new one
Linux/Mac OS X
Please remove the old host key with the following command
ssh-keygen -R euler.ethz.ch
After removing the old host key, you need to login again, compare the displayed host key with the ones published on our wiki and accept the new one in case it is matching.
Windows
If you are using PuTTY, then you can remove the old host keys in the Windows registry.
- Start regedit.exe
- Navigate to HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\SshHostKeys
- Delete the host key for euler.ethz.ch
After removing the old host key, you need to login again, compare the displayed host key with the ones published on our wiki and accept the new one in case it is matching.
