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Cake day: July 7th, 2023

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  • There should be a section in the configuration about dhcp, which is how ipv4 addresses are given out on your network. What happens is when a device first connects to the network, it sends out a broadcast with its mac address - the dhcp server (in this case, your router/firewall) hears this, and sends back a reply allocating an address. You should be able to see a list of currently allocated addresses, and hopefully configure reservations to make those allocations permanent. To reserve an ipv4 address for a specific device, you need that device’s mac address.

    Each item on that current allocations list should have a hostname, a mac address, and an ipv4 address. If it’s not clear by the hostname which device is the tv, you can look up each mac address and deduce from there (the first part of each address is unique to a specific manufacturer).

    Once you have an ipv4 address reserved for the tv, you can set your outbound firewall rule to block it.

    Ipv6, as I mentioned, is much more complicated. It might be possible to disable it completely on your router, and that’s likely the only way to block the tv from using it, but then your whole network will lose ipv6 capability across that boundary (probably not a lot of downside to that, though).

    Good luck!


  • If your firewall can set outbound rules, and you can control DHCP on your network so that you can reliably know the TV’s IPv4 address, you can block the TV from reaching beyond the local network there with a “deny all from source address of TV” type rule.

    If your router/firewall is handling IPv6 though, it gets a lot more complicated, since the TV could have any number of addresses that change often.


  • I’d recommend a full battery calibration before running the command one more time, if you haven’t already (charge the battery fully, leave it on the charger at 100% for a while, then fully discharge until it shuts itself off, leave it for a bit, then fully recharge while off). If the calibrated values line up with a full:design ratio of ~80%, especially with a 10-year-old battery with almost 700 cycles on it, my take is that’s pretty great.

    That said, I think the best way to get an accurate feel for the health of an old battery is to put it through one full cycle of normal use and time how long it takes to die.





  • mlfh@lemmy.mlto196@lemmy.blahaj.zoneyou know what
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    2 months ago

    The resolution is actually quadrupled by doubling the value of both axes. In this case going from 1500x1424 (2.1MP) to 3504x3327 (11.7MP) multiplies the total number of pixels by 5.4

    With the same level of jpeg compression you’d expect it to jump from 700KB to roughly 4MB. Since both images are the same file format, the rest of the file size difference is likely attributable to less jpeg compression being used in the larger image.






  • mlfh@lemmy.mltoPrivacy@lemmy.mlELI5: GrapheneOS questions
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    4 months ago
    • Your user account on GrapheneOS is just a local user account
    • GrapheneOS comes with its own camera, gallery, contacts, sms, phone, and file manager apps, a hardened fork of Chromium called Vanadium, and an app that lets you install sandboxed versions of google play services and google play store, if you so wish. Nothing else. You can install other apps using F-Droid, or by installing the google play store app.
    • GrapheneOS does not have a “cloud”, aside from the web services it uses to check for and pull new updates. If you want to sync files somewhere, you can install whatever you want (Nextcloud, Google Drive, etc)
    • F-Droid is a fine choice, and the google play store is as well, all depending on what your priorities are for your phone. I only use F-Droid and have no non-foss apps on my phone for privacy reasons, for example.
    • Running your own Nextcloud server is a great learning exercise, but it’s a big commitment of time if you’re not already familiar with linux administration, and if you want it to be secure and accessible remotely that’s even harder. Don’t let that be an impediment to getting a secure phone though - you can always keep using Google Drive for now, and then learn how to set up Nextcloud or some such as you go along.

    Good luck!