No Machine stopped after launching EC2 instance into new VPC - solved

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The Error

If you get this error from your No Machine Client Desktop

NX> 500 Authentication failed
NX> 500 Remote host identification has changed
NX> 500 Offending key in /usr/NX/home/nx/.ssh/known_hosts
NX> 999 Bye.
NX> 280 Exiting on signal: 15

Solution

I solved this by doing:

Find file usr/NX/home/nx/.ssh/known_hosts which includes old keys used by your ssh daemon. Remove your old key(s) by commenting out the lines.


Create new connection into host using No Machine Wizard.

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