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2

Sshd doesn't care where the connection is coming from, if it's configured to do a reverse DNS lookup, it does.


1

If you cannot confirm that key fingerprint as coming from your ubuntu host, the likely cause is that you are not really connecting to the host/service that you think you are. Not only are you getting a different host key, the key length of 1040 seems a bit peculiar. Doing a quick google search on the fingerprint 86:03:d0:87:3d:67:3a:9a:9b:83:7a:39:a7:2e:e7:...


1

You can set the option UseDNS no in the file /etc/ssh/sshd_config on your server to tell sshd(8) not to do DNS lookups.



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