I currently use Authy on my android and my Linux system.

It syncs every new authenticator between my devices but I dont want to trust companies with my security anymore.

I host a nextcloud instance on my homelab. Does anyone know a good FOSS authenticator that can use my nextcloud to sync between Linux and android? Provided that it is available on both of course.

Thanks for any input!

    • Cargon@lemmy.ml
      8·
      10 months ago

      This is what I used as well (KeePassXC specifically), with Syncthing sharing the .kdbx file across devices.

    • daco@lemm.ee
      5·
      10 months ago

      I’m using this with Nextcloud through WebDAV.

      There is a keepass app in Nextcloud to access your keepass database using a web browser (keeweb), keepassXC has a client for Linux, Mac and windows (and all of them work great) and there are many apps for iOS and android.

      I use the free version of Strongbox with WebDAV and I haven’t had any problems.

      You can just backup the keepass database file and you can also have several databases. Each database has its own password.

  • ikornaselur@lemm.ee
    11·
    10 months ago

    Have you checked out Aegis?

    Edit: I missed the Linux requirement, not sure if Aegis works with that in mind

      • lemmyvore@feddit.nlEnglish
        6·
        10 months ago

        You can use OTPClient on desktop, it can import Aegis encrypted exports.

        It’s what I do, my TOTP codes originate on the phone because I scan the QR codes with it, but Aegis is set to export a backup each time something changes.

        A sync app (FolderSync) runs every night and gets the export to my server, where it gets picked up for offline backups.

        I load the latest export in OTPClient only as needed, when I run into a 2fa which is not there.

        Both Aegis and OTPClient can be set to ask for password each time you open them.

  • Nils@feddit.de
    6·
    10 months ago

    I personally use Bitwarden for my 2FA needs. As others mentioned you can self host the server but personally I have no reason not to trust their SaaS solution, especially now that they offer EU hosted servers. If all you want is a basic authenticator app that does only one thing give FreeOTP a try, it’s made my RedHat. You can then sync the applications state.

    • Cralder@feddit.nu
      3·
      10 months ago

      I use bitwarden for 2FA as well. The only issue I have is that I need another solution as well since I also have 2FA activated on my bitwarden account. You can’t have bitwarden 2FA saved on bitwarden. (Well you can but that’s obviously a bad Idea)

      • Nils@feddit.de
        1·
        10 months ago

        That is true. But that’d be the case for any online/cloud 2FA service. So you could either have a local 2FA app just for Bitwarden or set up less secure but more convenient email 2FA.

      • Asudox@lemmy.world
        1·
        10 months ago

        Then I guess use a hardware key for Bitwarden and 2FA (saved in Bitwarden) for the websites that don’t support it. Or bitwarden could implement something like 1Password’s second password mechanism. That would most likely solve tge 2FA issue.

  • Dsklnsadog@lemmy.dbzer0.com
    4·
    10 months ago

    I’m surprised no one has recommended “2FAS” yet. It’s the open-source alternative. The app is primarily designed for mobile, but they also offer a browser extension that you could install on Linux if you wanted to. Personally, I always try to keep my 2FA apps unsynchronized with a desktop PC.

    Oh, and you can export your secrets at any time. Not like Authy.

  • neeeeDanke@feddit.de
    2·
    10 months ago

    KeepassXC supports 2fa natively and in Keepass2 there is an addon available. I have a .kdbx I sync with nextcloud to my pcs and access it via WebDav on Keepass2Android. It works great (when nextcloud sync works, recently had an issue with "invalid modification date"s on my pc).

  • 👁️👄👁️@lemm.eeEnglish
    11·
    10 months ago

    I just bitwarden pass manager to store all my 2fa stuff. I just let the company host my account, but if you don’t want that then you can self host your own bitwarden server for free. It’s very convenient, especially with the autofill on desktop and mobile.

  • Envis10n@lemm.ee
    0·
    10 months ago

    andOTP is a good option for Android. It does offer backup capabilities which could be used for syncing. Bitwarden is also good

    • n2burns@lemmy.ca
      1·
      10 months ago

      andOTP is no longer maintained, so it’s not a good suggestion and you should probably see about migrating to another app. I personally went to Aegis and had a smooth transition.

  • kraxyk@beehaw.org
    0·
    10 months ago

    Personally I would use andOTP on my mobile with backups and use OTPClient on my computer. I don’t like having my 2 factor auth stored in the same system as my passwords. Because if the password manager was ever lost or stolen you’d have all your eggs in one basket essentially.

    • n2burns@lemmy.ca
      0·
      10 months ago

      Copied from my other comment in this thread:

      andOTP is no longer maintained, so it’s not a good suggestion and you should probably see about migrating to another app. I personally went to Aegis and had a smooth transition.

      • kraxyk@beehaw.org
        01·
        10 months ago

        While that is true, there have been many discussions about if there are any known security vulnerabilities or new spec changes that would cause a problem. The consensus from the community is that it is safe to use for quite some time. Not invalidating your points in any way just putting out what I know.