SSH key fingerprints don't match











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I'm trying to SSH from my laptop into my desktop. On the desktop, ssh-keygen -lf ~/.ssh/id_ecdsa.pub yields 08:ac:cb:9c:e8:c2:4f:2c:1d:6e:54:ad:83:c7:27:47, but when I try to connect, I'm told the ECDSA key fingerprint is something completely different.



I can connect to the machine through HTTP, so I know it's the right one. I'm worried someone is trying to MITM me.










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    up vote
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    favorite












    I'm trying to SSH from my laptop into my desktop. On the desktop, ssh-keygen -lf ~/.ssh/id_ecdsa.pub yields 08:ac:cb:9c:e8:c2:4f:2c:1d:6e:54:ad:83:c7:27:47, but when I try to connect, I'm told the ECDSA key fingerprint is something completely different.



    I can connect to the machine through HTTP, so I know it's the right one. I'm worried someone is trying to MITM me.










    share|improve this question


























      up vote
      2
      down vote

      favorite









      up vote
      2
      down vote

      favorite











      I'm trying to SSH from my laptop into my desktop. On the desktop, ssh-keygen -lf ~/.ssh/id_ecdsa.pub yields 08:ac:cb:9c:e8:c2:4f:2c:1d:6e:54:ad:83:c7:27:47, but when I try to connect, I'm told the ECDSA key fingerprint is something completely different.



      I can connect to the machine through HTTP, so I know it's the right one. I'm worried someone is trying to MITM me.










      share|improve this question















      I'm trying to SSH from my laptop into my desktop. On the desktop, ssh-keygen -lf ~/.ssh/id_ecdsa.pub yields 08:ac:cb:9c:e8:c2:4f:2c:1d:6e:54:ad:83:c7:27:47, but when I try to connect, I'm told the ECDSA key fingerprint is something completely different.



      I can connect to the machine through HTTP, so I know it's the right one. I'm worried someone is trying to MITM me.







      ssh encryption






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      share|improve this question













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      share|improve this question








      edited Nov 21 at 0:37









      Basil Bourque

      158210




      158210










      asked Sep 10 '15 at 19:41









      Functino

      1244




      1244






















          1 Answer
          1






          active

          oldest

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          up vote
          4
          down vote



          accepted










          It tells you more than what you present here. You need to understand difference between server host key and your client identity key:





          • This is fingerprint of your local client identity key:



            ssh-keygen -lf ~/.ssh/id_ecdsa.pub



          • By calling ssh remotehost you are prompted to verify server host key, which is stored on server and you or somebody with access to the server can create you the same fingerprint by executing



            ssh-keygen -lf /etc/ssh/ssh_host_ecdsa_key.pub



          These two fingerprints will never match.



          This can be found in man sshd.






          share|improve this answer























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            1 Answer
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            active

            oldest

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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            4
            down vote



            accepted










            It tells you more than what you present here. You need to understand difference between server host key and your client identity key:





            • This is fingerprint of your local client identity key:



              ssh-keygen -lf ~/.ssh/id_ecdsa.pub



            • By calling ssh remotehost you are prompted to verify server host key, which is stored on server and you or somebody with access to the server can create you the same fingerprint by executing



              ssh-keygen -lf /etc/ssh/ssh_host_ecdsa_key.pub



            These two fingerprints will never match.



            This can be found in man sshd.






            share|improve this answer



























              up vote
              4
              down vote



              accepted










              It tells you more than what you present here. You need to understand difference between server host key and your client identity key:





              • This is fingerprint of your local client identity key:



                ssh-keygen -lf ~/.ssh/id_ecdsa.pub



              • By calling ssh remotehost you are prompted to verify server host key, which is stored on server and you or somebody with access to the server can create you the same fingerprint by executing



                ssh-keygen -lf /etc/ssh/ssh_host_ecdsa_key.pub



              These two fingerprints will never match.



              This can be found in man sshd.






              share|improve this answer

























                up vote
                4
                down vote



                accepted







                up vote
                4
                down vote



                accepted






                It tells you more than what you present here. You need to understand difference between server host key and your client identity key:





                • This is fingerprint of your local client identity key:



                  ssh-keygen -lf ~/.ssh/id_ecdsa.pub



                • By calling ssh remotehost you are prompted to verify server host key, which is stored on server and you or somebody with access to the server can create you the same fingerprint by executing



                  ssh-keygen -lf /etc/ssh/ssh_host_ecdsa_key.pub



                These two fingerprints will never match.



                This can be found in man sshd.






                share|improve this answer














                It tells you more than what you present here. You need to understand difference between server host key and your client identity key:





                • This is fingerprint of your local client identity key:



                  ssh-keygen -lf ~/.ssh/id_ecdsa.pub



                • By calling ssh remotehost you are prompted to verify server host key, which is stored on server and you or somebody with access to the server can create you the same fingerprint by executing



                  ssh-keygen -lf /etc/ssh/ssh_host_ecdsa_key.pub



                These two fingerprints will never match.



                This can be found in man sshd.







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited Sep 11 '15 at 2:48









                Functino

                1244




                1244










                answered Sep 10 '15 at 19:49









                Jakuje

                7,06251828




                7,06251828






























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