I have been thinking about self-hosting my personal photos on my linux server. After the recent backdoor was detected I’m more hesitant to do so especially because i’m no security expert and don’t have the time and knowledge to audit my server. All I’ve done so far is disabling password logins and changing the ssh port. I’m wondering if there are more backdoors and if new ones are made I can’t respond in time. Appreciate your thoughts on this for an ordinary user.

  • Possibly linux
    link
    fedilink
    English
    arrow-up
    8
    arrow-down
    1
    ·
    2 months ago

    Fun fact, you can use let’s encrypt certs on a internal environment. All you need is a domain.

      • Amju Wolf@pawb.social
        link
        fedilink
        English
        arrow-up
        4
        arrow-down
        1
        ·
        2 months ago

        …which shouldn’t be an issue in any way. For extra obscurity (and convenience) you can use wildcard certs, too.

          • Amju Wolf@pawb.social
            link
            fedilink
            arrow-up
            2
            ·
            2 months ago

            Have been for a long time. You just have to use the DNS validation. But you should do that (and it’s easy) if you want to manage “internal” domains anyway.

            • delirious_owl@discuss.online
              link
              fedilink
              arrow-up
              2
              arrow-down
              1
              ·
              2 months ago

              Oh, yeah, idk. Giving API access to a system to modify DNS is too risky. Or is there some provider you recommend with a granular API that only gives the keys permission to modify TXT and .well-known (eg so it can’t change SPF TXT records or, of course, any A records, etc)

              • Amju Wolf@pawb.social
                link
                fedilink
                English
                arrow-up
                2
                ·
                2 months ago

                What you can (and absolutely should) do is DNS delegation. On your main domain you delegate the _acme-challenge. subdomains with NS records to your DNS server that will do cert generation (and cert generation only). You probably want to run Bind there (since it has decent and fast remote access for changing records and other existing solutions). You can still split it with separate keys into different zones (I would suggest one key per certificate, and splitting certificates by where/how they will be used).

                You don’t even need to allow remote access beyond the DNS responses if you don’t want to, and that server doesn’t have anything to do with anything else in your infrastructure.

                  • Amju Wolf@pawb.social
                    link
                    fedilink
                    English
                    arrow-up
                    2
                    ·
                    2 months ago

                    Yes, that’s one option. Then you only have to distribute the certificates and keys.

                    Or you allow remote access to that DNS server (Bind has a secure protocol for this), do the challenge requests and cert generation on some other machine. Depends on what is more convenient for you (the latter is better if you have lots of machines/certs).

                    Worst case if someone compromises that DNS server they can only generate certificates but not change your actual valuable records because these are not delegated there.

        • delirious_owl@discuss.online
          link
          fedilink
          arrow-up
          2
          arrow-down
          1
          ·
          2 months ago

          How would that prevent this? To avoid cert errors, you must give the DNS name to let’s encrypt. And let’s encrypt will add it to their public CT log.

          • Possibly linux
            link
            fedilink
            English
            arrow-up
            1
            arrow-down
            1
            ·
            2 months ago

            Sorry I though you were referring to IP leakage. Apologizes

    • gerdesj@lemmy.ml
      link
      fedilink
      English
      arrow-up
      1
      ·
      2 months ago

      I do use it quite a lot. The pfSense package for ACME can run scripts, which might use scp. Modern Windows boxes can run OpenSSH daemons and obviously, all Unix boxes can too. They all have systems like Task Scheduler or cron to pick up the certs and deploy them.