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    To confirm; you're on one machine on your local network, trying to SSH to your external IP address and getting an error? This isn't unusual, depending on your router and configuration. Sometimes they just don't like internal addresses accessing the external IP address. Commented Aug 27, 2016 at 2:04
  • Correct, but why would it be offering a connection all the way to the password prompt? Commented Aug 27, 2016 at 2:09
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    Given the routing, it's possible you're being directed to an ssh daemon on the router itself. Commented Aug 27, 2016 at 2:22
  • Stephen said what I would have commented. You should try it on another connection to confirm the behavior. Commented Aug 27, 2016 at 2:31
  • That makes sense, I have checked and the Host key is the same for the domain name and two different ip addresses, one is current and the other is likely older, I am on dynamic connection so that explains this part. I will still do some more checking. On a sidenote, it seems then that Linux Mint Sarah does not have diffie-hellman-group1-sha encryption the router is offering but macosx and debian both do. Commented Aug 27, 2016 at 2:33