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Joined 10 months ago
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Cake day: November 10th, 2023

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  • groet@feddit.detoComic Strips@lemmy.worldI'm in!
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    4 months ago

    You DONT want to turn it off. Digital forensics work WAAAAAAY better if you have a memory dump of the system. And all the memory is lost if you turn it off. Even if the virus ran 10h ago and the program has long stoped running, there will most likely still be traces in the RAM. Like a hard drive, simply deleting something in RAM doesn’t mean it is gone. As long as that specific area was not written over later it will still hold the same contenta. You can sometimes find memory that belonged to a virus days or even weeks after the infection if the system was never shut down. There is so much information in ram that is lost when the power is turned off.

    You want to 1: quarantine from network (don’t pull the cable at the system, but firewall it at the switch if possible) 2: take a full copy of the RAM 2.5: read out bitlocker keys if the drive is encrypted. 3: turn off and take a bitwise copy of the hard drive or just send the drive + memory dump to the forensics team. 4: get coffee



  • I have set it up in a way where all the packets have to go through their VPN and if they don’t, they get dropped before they leave my PC.

    That is the function of a firewall and not of the VPN. As I understand portmaster it does both. But that is not normal VPN behavior.

    VPNs are not magic. They are a piece of software that encrypt traffic and send it to a special server. They do that by creating a virtual Internet connection (think like pluging in an additional Ethernet cable or connection to an addition WiFi at the same time). Everything that is sent through the virtual connection is encrypted. Your system now has (at least) two valid Internet connections (one real and one virtual). For every packet it sends it needs to decide which connection it should send it from. This is decided by something called the routing table. When you start the VPN it will put two routes into the table.

    • traffic going to the VPN server goes through the real connection (so the encrypted VPN traffic is routed correctly)
    • everything else goes through the virtual connection (the VPN tunnel where it gets encrypted)

    The attack described is a way how a network router can add a new route into your devices routing table to basically override the second route from the VPN. The route is still there, there just is another one that has a higher priority.

    A VPN is not the ultimate authority over your network traffic. It is just another program sending and recieving taffic.










  • The thing that confused me when first learning about docker was, that everybody compares it to a virtual machine. It’s not. Containers dont virtualize anything. They take a (single) process from the host OS and separate that into its own environment. All system calls, memory access, file writes etc are still handled by the same os (same kernel). However the process is separated both on the file system and process level. It can’t see other processes outside of the container and it also doesn’t see the real filesystem. It sees a filesystem provided by the container. This also means it sees different file and user permissions. When you run a alpine Linux docker container on an Ubuntu system, the container only containes the (few) files for alpine but no Linux kernel no desktop environment. A process inside that container only sees the alpine files and not the Ubuntu files. It also means all containers see a filesystem independent of each other and can use libraries and dependencies of different versions (they are only files after all).

    For administration it makes running complex services easy. You define how to setup that service (what base Linux distro to use, what packages to install, what commands to run, and how to start the process). You can then be save to assume the setup of that service did not interfere with the setup of any other service. “Service 1 needs a certain system wide config changed? Service 2 needs that config in the default state? And both need a different version of the same library?” In containers you can have all at the same time because they each see a different version of the same config and library.

    And all this is provided by the kernel itself. All docker does is provide an “easy” way to create and manage containers but could could do all of that using chroot, runc and a few other.

    As a note, containers usually don’t come with systemd as they don’t need an init system. You would run the service directly inside the container and then use systemd outside the container to make sure the container is started/restarted, or just docker as it can already do that.

    I found a great article demystifying containers recently


  • groet@feddit.detoFirefox@lemmy.mlWhy I use Firefox
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    7 months ago

    Chrome doesn’t care about closing html tags. If they are mising the document is invalid but chrome will render it anyway and just add the closing tag where it thinks it should be.

    At the other end, Firefox goes beyond the standard and will block certain connections that should be allowed by the fetch standard (the setting to disable that is called enhanced tracking protection).

    So chrome allows things things it shouldn’t while Firefox blocks some it shouldn’t


  • They sometimes buy keys using stolen credit cards. When the fraud is found out, the banks will request the money from the developer. They in turn often don’t have a way to lock the fraudulent key, so it remains valid.

    The costs for the initial bank transfer, plus the time invested in returning the money to the credit card holder are payed by the developer.

    The key reseller has a 100% profit margin, the customer has a valid and cheap game key, and the developer actually lost time and money.






  • groet@feddit.detoGaming@lemmy.worldThen vs Now
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    8 months ago

    No idea why they attached the FPS directly to the hardware.

    It’s the most trivial and straight forward thing to do. The game is a simple loop of:

    • get user input (can be nothing)
    • calculate new game state based on old state and input
    • draw new game state.

    The speed of the game is now 100% dependant on the speed of computation. NOT attaching fps to hardware is the hard thing, as you need to detach the game state loop and the drawing loop and then synchronize them. Doing that yourself is extremely complicated. Today developers don’t even need to think about that because the whole drawing loop is abstracted away by things like directX/Vulcan and the game engine. But without those tools, fps tied to CPU speed is basically the default.


  • That is a real problem. In a perfect world you would want all of your data to be available to everyone who can use it to improve your live. And only getting advertisement for things you actually want/need (not only think you want/need) is a real improvement of your live.

    Sadly “improving lives of consumers” is not the goal of any of the big data collectors and as such any data collected is or will be missused to cause harm to the owner even if it is not directly obvious.