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Client with XP cannot connect with OpenVPN

Scheduled Pinned Locked Moved OpenVPN
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  • J
    jahonix
    last edited by May 8, 2018, 11:46 AM

    That's probably because Windows XP is deprecated for years already and now unsupported?
    I wouldn't want to be online with that Windows version anymore. Really, get a more current Windows version for everything, especially being online.

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    • V
      viragomann
      last edited by May 8, 2018, 3:38 PM May 8, 2018, 12:52 PM

      I agree with Chris.

      Apart from this, Windows XP does not support GCM encryption. This is only supported by OpenVPN 2.4, but that cannot be installed on XP. Also NCP is not supported by OpenVPN versions lower 2.4.
      So to connect XP clients to the server you must change the encryption algorithm, e.g. to a CBC version. If you intend to do that, also check "Enable NCP" and select your preferred GCM algorithm from the list below. That enables NCP capable clients to connect with GCM encryption, while elder clients can connect with the algorithm you've selected at "Encryption Algorithm".

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      • J
        johnpoz LAYER 8 Global Moderator
        last edited by May 8, 2018, 2:39 PM

        Going to chime in as well - XP should no longer be viable OS… If you are using it for some legacy something.  It should not have any sort of network access at all..

        Viragomann work around should be work - but better is to move away from such an OLD OS that has no support.

        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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        • Z
          Zyhr
          last edited by May 8, 2018, 2:48 PM

          Ok, thank to all of you.

          Yeah, I agree about XP should be retired, but it's not my decision.

          I will try viragomann solution and will let you know about as soon as possible.

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          • J
            johnpoz LAYER 8 Global Moderator
            last edited by May 8, 2018, 3:05 PM

            Make it their decision to update their OS then.. Sorry "MY" vpn doesn't work with XP since it is non support OS and security issue.

            Update your OS to supported version, or sorry will not be able to connect to "MY" vpn ;)

            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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            • J
              jahonix
              last edited by May 8, 2018, 3:51 PM

              ^ exactly how I would handle this.
              Sometimes people need a hard reminder to change necessary stuff. Now you have the option!

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              • Z
                Zyhr
                last edited by May 8, 2018, 5:04 PM

                I was going to change encryptation but, as you can see on picture attached, it seems to be already as viragomann sujested.

                Is this how it should be or I should change anything?

                I would like to do that, so they change XP to, at least, Windows 7 but as far as I know, my boss already told they will be able with XP (we're a technical support company)

                Again, thanks allf of you for your help.

                ![Sin título.jpg](/public/imported_attachments/1/Sin título.jpg)
                ![Sin título.jpg_thumb](/public/imported_attachments/1/Sin título.jpg_thumb)

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                • V
                  viragomann
                  last edited by May 8, 2018, 5:22 PM

                  Maybe it helps to remove the ncp-ciphers line from the client config.

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                  • Z
                    Zyhr
                    last edited by May 8, 2018, 5:31 PM

                    I will try tomorrow then.

                    Thanks!

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                    • J
                      johnpoz LAYER 8 Global Moderator
                      last edited by May 8, 2018, 6:11 PM

                      "my boss already told they will be able with XP"

                      Well clearly your boss spoke out his ass without knowing anything..  That your boss would say XP is fine is clearly out of touch with IT from every angle…

                      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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                      • Z
                        Zyhr
                        last edited by May 9, 2018, 7:30 AM

                        Hi all,

                        After removing whole line now works.

                        So, for anyone that may come in the future with the same problem, solutions is remove the following line only in conf file of windows xp clients

                        ncp-ciphers AES-256-GCM: AES-128-GCM

                        One more time thanks all of you for your help.

                        Have a nice day!

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                        • J
                          jimp Rebel Alliance Developer Netgate
                          last edited by May 9, 2018, 4:03 PM

                          If you use the client export package, you can click the option to export one of the old windows installers with the "-xp" suffix, and you can also check the "legacy client" option in the export package when making inline configurations.

                          But the best thing to do is ditch XP.

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