SayCyberOnceMore

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  • 329 Comments
Joined 3 years ago
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Cake day: June 17th, 2023

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  • SayCyberOnceMore@feddit.ukOPtoSelfhosted@lemmy.worldSystem Redundancy
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    2 days ago

    That (2 FWs) was what I was considering initially.

    But, looking at some other posts, I’m starting to rethink my design as I only have 1 WAN connection, then I only need 1 FW (maybe). SIM would be rarely used, I’m not sure the overall cost would be worth it

    So separating FW from DHCP & DNS might be a better solution.






  • Good points there.

    For 1. The ISP router is a Fritz one set to bridge mode running over a PoE adapter from the same UPS the firewall is using. It stayed up all the time (looking back at the logs)

    1. Not sure what happened here, but the firewall is the DNS resolver and when everything else powered back up, nothing got an IP address. Now, whether thw service failed or the WAPs took longer to start than the devices could wait, I’m not sure, but as Scotty said: it’s dead Jim.

    2. Good point. I don’t need it ALL to be redundant.

    3. Also good. The UPS is directly connected to the firewall (which has NUT in), but it doesn’t inform anything else… I’ll look into that too.

    Nice mental reset for me about over thinking it… thanks









  • I think the point here is that no-one uploads / enters a password/phrase/file.

    Whatever you enter on the keyboard is hashed and the hash is sent. Depending on the protocol, sometimes it’s time limited so no-one can record the network traffic and resend the data (replay attack)

    Files (SSH keys, certificates, etc) are checked against a (usually) asymetric key exchange algorithm, so they can only compare what’s sent if they have the corresponding key to decrypt the cipher.

    The length of the password (or file) is basically meaningless. It’s just how long it’ll take someone to guess it (brute-force), but as the saying goes, you don’t break into a house through the door, you go through Windows… ie the weakest link.

    In your concept, the weakest link is the meatware: humans. We need ease of use, so, someone will store that file and it’ll be compromised, so 64b, 128b or 512b doesn’t matter, if they have the file, they’re in.

    Now… MFA… Now, that’s more like it.



  • I have a 7530. (Is yours a typo?)

    Yes, those instructions look about right.

    My pfSense box has the username & password, so the router really is just being used as a dumb modem (I used to use Draytek modems)…

    … but…

    The router’s diagnostics will show the DSL details, so you can check if your external connection is ok (ie OSI Layer1), but it will always think it’s offline.

    So once you get your OPNSense setup and working, have a look around the Fritz diagnostics and get comfy with what you can / can’t see, because when there’s a failure you won’t know what is really failed.

    Also… write down what you did and how to reverse it, as you (or others) might want to reset it to full router if your OPNSense is down.


  • The advice above matches mine.

    I have a home-built pfSense unit and when parts die (not if), then I just replace them with spares I have already waiting… as that box is now critical for you.

    I also have a Fritz in bridge mode with the pfSense doing PPPoE through it, so effectively, the firewall is the first real device on the WAN. Makes things much simpler as the WAN interface has status like packet drops, etc, much easier to diagnose issues.


  • Wow.

    Ok, I don’t have anywhere near that amount of media, but MythTV takes seconds to rescan ~2TB of videos and maybe a minute to get any missing details like fanart, etc.

    Similar amount for music - but I feed it the files after I’ve run them through Picard.

    I’ve not done a complete rescan of eveything for ages, but from memory it’s like an hour absolute tops. More like ~30 mins.

    And that’s on an underclocked CPU (for quietness).