Difference between revisions of "Host keys for Euler login nodes"

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(How to remove the old key and add the new one)
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==Introduction==
 
==Introduction==
When we replace the login nodes with new ones, then the host keys will change, therefore upon next login, you will receive a message
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When we replace the login nodes, the host keys will change, therefore upon next login you will receive a message
  
 
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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==Currently valid keys==
 
==Currently valid keys==
Please find below the list of the currently valid host keys
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The currently valid host keys are:
  
 
* ED25519 : MD5:2f:c3:be:36:60:86:28:34:d8:4e:cb:27:66:66:25:a4
 
* ED25519 : MD5:2f:c3:be:36:60:86:28:34:d8:4e:cb:27:66:66:25:a4

Revision as of 08:54, 26 July 2018

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 currently valid host keys are:

  • ED25519 : MD5:2f:c3:be:36:60:86:28:34:d8:4e:cb:27:66:66:25:a4
  • ED25519 : SHA256:cbQ9er7E8tFacneNGj2ze09bQUapCuUni5JMiF+wH0A
  • RSA : MD5:ab:4b:dd:24:2a:22:eb:5a:74:2a:72:ed:9c:d1:ad:6f
  • RSA : SHA256:qdZ/jPc7HODpO2BmCtJxO51jFZVt1t6fjjbtiUAZemI

How to remove the old key and add the new one

Please remove the old host key with the following command

ssh-keygen -R euler.ethz.ch