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    SSH: Couldn't agree a key algorithm (available: curve25519-sha256@libssh.org)

    Scheduled Pinned Locked Moved Problems Installing or Upgrading pfSense Software
    38 Posts 14 Posters 114.7k Views
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    • A
      AndrewZ
      last edited by

      update putty

      1 Reply Last reply Reply Quote 2
      • D
        ddpfsense
        last edited by

        @AndrewZ:

        update putty

        Thank you that worked!

        1 Reply Last reply Reply Quote 0
        • jimpJ
          jimp Rebel Alliance Developer Netgate
          last edited by

          FYI- We disabled some older, weaker, ssh key exchange algorithms. It won't be uncommon to find some older programs that use ssh directly or via things like libssh, that will need to be updated.

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            yeah the issue I am having is with securecrt, you would think they would enabled chacha20 but not yet.. they just recently added ed25519..

            But the dev version of putty has had both for quite some time.

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.7.2, 24.11

            1 Reply Last reply Reply Quote 0
            • S
              silenceti
              last edited by

              Works for me 2!

              Thanks…

              1 Reply Last reply Reply Quote 0
              • jimpJ
                jimp Rebel Alliance Developer Netgate
                last edited by

                FYI- I added details about the SSH daemon changes here: https://doc.pfsense.org/index.php/2.3.2_New_Features_and_Changes#SSH_Daemon

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                • M
                  mdima
                  last edited by

                  Same problem here, the latest version of WS_FTP doesn't supports pfSense SSH anymore. I asked support to IPSwitch (the makers of WS_FTP).

                  1 Reply Last reply Reply Quote 0
                  • KOMK
                    KOM
                    last edited by

                    I just bumped into this earlier today too.  My putty was from 2013 and an update fixed it no problem.  Then I come here and someone else has the same issue.

                    1 Reply Last reply Reply Quote 0
                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by

                      It really is sad the old stuff some of these major applications are using. The one that really ticks me off is freaking cisco!!  Even to their security devices they do not support the current best practice for kex and ciphers..

                      I think players like pfsense and even stuff like filezilla not connecting to antiquated stuff will hope to push the major players to get with the times.

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                      • jimpJ
                        jimp Rebel Alliance Developer Netgate
                        last edited by

                        I hope so. I nudged Vandyke about getting the stronger kex/mac/ciphers we have in their list. It connects fine if you have a current version of SecureCRT but there is room for improvement. It is still missing chacha20-poly1305, AES256-GCM, and curve25519-sha256

                        Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

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                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator
                          last edited by

                          Yeah I did the same thing with vandyke, they added ed25519 I believe in 8.01 or 02 but yeah still missing for sure chacha20

                          Maybe .03 is out??  Off to check..  You would think such a company who's bread and butter is ssh client and server even would be up to speed..

                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                          If you get confused: Listen to the Music Play
                          Please don't Chat/PM me for help, unless mod related
                          SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                          • jimpJ
                            jimp Rebel Alliance Developer Netgate
                            last edited by

                            I need to test it some more but I also had an issue with keyboard-interactive on the latest SecureCRT against pfSense 2.3.2 that I need to e-mail them about. Key auth works, and plain password (ew), but not keyboard-interactive.

                            Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

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                            1 Reply Last reply Reply Quote 0
                            • H
                              Harvy66
                              last edited by

                              FYI

                              https://lists.freebsd.org/pipermail/freebsd-announce/2016-August/001737.html

                              FreeBSD 11 is dropping support for OpenSSH DSA keys.

                              1 Reply Last reply Reply Quote 0
                              • johnpozJ
                                johnpoz LAYER 8 Global Moderator
                                last edited by

                                ^ nice info Harvy66, I would of prob not have noticed that info I don't subscribe to that list - prob should ;)  Nice to hear though.. I would assume pfsense will follow suite, maybe beat them to the punch ;)

                                An intelligent man is sometimes forced to be drunk to spend time with his fools
                                If you get confused: Listen to the Music Play
                                Please don't Chat/PM me for help, unless mod related
                                SG-4860 24.11 | Lab VMs 2.7.2, 24.11

                                1 Reply Last reply Reply Quote 0
                                • jimpJ
                                  jimp Rebel Alliance Developer Netgate
                                  last edited by

                                  We stopped generating them some time ago, and on 2.3.2 they are not used even if present.

                                  Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

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                                  1 Reply Last reply Reply Quote 0
                                  • R
                                    RabidWolf9
                                    last edited by

                                    Putty 0.67 compiled on Debian Jessie 8.4 x64, will work on all Debian based variants, ie: Ubuntu, etc.
                                    For Windows just download from Putty's website.

                                    Will solve the issue "SSH: Couldn't agree a key algorithm (available: curve25519-sha256@libssh.org)"

                                    http://www.legionit.net/downloads/putty_0.67-1_amd64.deb.tar.gz

                                    Will compile FileZilla if any one needs it?

                                    ![Putty to pFsense - Couldnt agree on Key Exchange Algorith.png](/public/imported_attachments/1/Putty to pFsense - Couldnt agree on Key Exchange Algorith.png)
                                    ![Putty to pFsense - Couldnt agree on Key Exchange Algorith.png_thumb](/public/imported_attachments/1/Putty to pFsense - Couldnt agree on Key Exchange Algorith.png_thumb)

                                    1 Reply Last reply Reply Quote 0
                                    • jimpJ
                                      jimp Rebel Alliance Developer Netgate
                                      last edited by

                                      When it comes to security packages such as ssh clients, please only download them from official sources, check the hashes and signatures if possible. Don't download builds from random sources.

                                      Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

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                                      1 Reply Last reply Reply Quote 0
                                      • R
                                        RabidWolf9
                                        last edited by

                                        Not having to compile in the first place would have been nice, however not offered on Putty's site and Git Hub is 0.63

                                        However the Admin: jimp is right

                                        MD5:  be9fabbd1fd58e2b5dc4ff022400eadf

                                        SHA1: b8e4b18743ed294d08220bbbb0b48105f0734850

                                        SHA256: ec4092dc30c86679013e9e86ce949653a283e1000ab488bb40523b968970a850

                                        1 Reply Last reply Reply Quote 0
                                        • N
                                          nambi
                                          last edited by

                                          No matter which version of putty I used it didn't work for my, strangely the same versions of putty work on my other pfsense box.  I don't understand why? I tired clearing out he reg files but still no go, what DID work for me was using BITVISE ssh client. this worked without issues.

                                          1 Reply Last reply Reply Quote 0
                                          • jimpJ
                                            jimp Rebel Alliance Developer Netgate
                                            last edited by

                                            I have yet to see a case where updating PuTTY didn't work. Perhaps you are still running an old putty somehow (wrong shortcut/link, for example).

                                            Remember: Upvote with the 👍 button for any user/post you find to be helpful, informative, or deserving of recognition!

                                            Need help fast? Netgate Global Support!

                                            Do not Chat/PM for help!

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