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  2. MIDRANGE-L
  3. January 2017

Re: SFTP Host key verification failed.

sftp -vvv -b /home/temporary/px200c4.txt EMARUSER@xxxxxxxxxxxxxxxxxxxxx

<snip>
debug1: Server host key: ssh-rsa
SHA256:Q74xuXl9kDX4Vm3Ocg0LSqouE4EpME586V87O
q5UXgI
Host key verification failed.
Connection closed


This is saying that the host server's key (the destination system you're
connecting to) has changed from what it was when you previously connected
to it. If you did not use the -b switch on sftp, it would probably give
you a big banner warning about this. Someone may have changed the host key
on the system you're connecting to or it's possible someone is doing a
Man-in-the-Middle. I would check with whoever runs SUITESFTP.EMARSYS.NET
to validate that their host key is really
Q74xuXl9kDX4Vm3Ocg0LSqouE4EpME586V87Oq5UXgI

To remove the old key run:

ssh-keygen -R SUITESFTP.EMARSYS.NET

Then the next time you connect, it will ask you to validate the host key
is valid and store it in the .ssh/known_hosts file for verification on
subsequent connection attempts.


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