3 ms·

What part isn't quite true? What you are talking about is RFC 4862. The SLAAC part of ipv6, which is auto-configuration. What I am talking about is RFC 4941:

by k_roy 2y ago

What part isn't quite true? What you are talking about is RFC 4862. The SLAAC part of ipv6, which is auto-configuration. What I am talking about is RFC 4941: Privacy Extensions for Stateless Address Autoconfiguration in IPv6 Which is pretty close to: "extension added later for privacy" 4862 < 4941

cyberax 2y ago
I'm just saying that the IPv6 privacy extension is far from useless. Without it, advertisers can track your device everywhere.
- k_roy 2y ago
  It’s a nice thought but… Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. Pretty simple browser fingerprinting will get you much closer. Not to mention that you know MAC addresses aren’t unique right. They only have to be unique on the same L2. And with some shipping logistics, you can make sure this is usually true. I say this as a person who received a case of Intel NICs back in the day and every MAC was the same.
  - Dylan16807 2y ago
    > Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. Of course they would, if it was how everyone still did addresses! It's a super easy to access permanent ID. > aren’t unique Rarely. That's hardly enough trouble to make trackers not use it.
  - cyberax 2y ago
    > Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. Erm... Whut? Nobody is tracking it right now because privacy extensions make it useless. You can bet that advertisers would have used it otherwise. Imagine being able to track where people move simply by using the freaking IP address. > Not to mention that you know MAC addresses aren’t unique right. For intents and purposes of advertisers they are unique. Duplicate MACs are probably not even a 0.0001% of all MACs.
    - k_roy 2y ago
      > Duplicate MACs are probably not even a 0.0001% of all MACs. I love it when people just make up numbers with zero backing. You know MACs only HAVE to be unique on the same L2 segment right? So with every device that has MAC addresses (including every Bluetooth or WiFi device), ESP32s, home assistant type stuff, all which have usually 2 or more MACs, do you really think it makes sense for a manufacturer to use a MAC once and never again? No. It’s called manufacturing and shipping logistics. It’s far easier than what you suggest. As far as your made up stat here, I should play the lottery because it’s happened at least two times over the course of a 30 year career. In 2006, I was part of a team building up a data center, and each server needed 4 NICs for iscsi speed and redundancy. Two cases out of 10, something like 40 or 50 NICs were identical to each other. The only reason we noticed is because this job required meticulous asset tracking. My guess is because we had ordered so many NICs, the supplier had needed to hunt a little to fill the order. The second time was when I ordered a lot of ProBooks off eBay for hackintoshing back around 2012. Again, at least two of them had the same physical MAC burned into the motherboard. And I’m guessing it’s because about half of them came from Florida and the other half came from Vancouver. I’m just telling you, MAC addresses aren’t as unique as you are trying to suggest because they don’t need to be.
      - cyberax 2y ago
        > I love it when people just make up numbers with zero backing. Well, can YOU provide references to duplicate MACs? I worked all my career with probably tens of thousands of devices, often in large broadcast domains, and I have never seen a duplicate MAC. Ever.
  - throw0101c 2y ago
    > Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. You'd be surprised. I allow cookies from Youtube for better preference recommendations, but am not logged in. You'd think that that would give me useful ads. However, I am with an ISP that services both the provinces of Ontario (English) and Quebec (French), and when my IP cycles if I reboot I sometimes I get an IP that is geo-located to Quebec and so I suddenly I get French-only ads until the new router reboot.
  - ThePowerOfFuet 2y ago
    >I say this as a person who received a case of Intel NICs back in the day and every MAC was the same. On the labels too, or just in the EEPROMs?
    - k_roy 2y ago
      I should have clarified. All the MACs in one case were identical to the MACs in a second case And both labels and burned in

by k_roy 2y ago

cyberax 2y ago

I'm just saying that the IPv6 privacy extension is far from useless. Without it, advertisers can track your device everywhere.

k_roy 2y ago
It’s a nice thought but… Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. Pretty simple browser fingerprinting will get you much closer. Not to mention that you know MAC addresses aren’t unique right. They only have to be unique on the same L2. And with some shipping logistics, you can make sure this is usually true. I say this as a person who received a case of Intel NICs back in the day and every MAC was the same.
- Dylan16807 2y ago
  > Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. Of course they would, if it was how everyone still did addresses! It's a super easy to access permanent ID. > aren’t unique Rarely. That's hardly enough trouble to make trackers not use it.
- cyberax 2y ago
  > Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. Erm... Whut? Nobody is tracking it right now because privacy extensions make it useless. You can bet that advertisers would have used it otherwise. Imagine being able to track where people move simply by using the freaking IP address. > Not to mention that you know MAC addresses aren’t unique right. For intents and purposes of advertisers they are unique. Duplicate MACs are probably not even a 0.0001% of all MACs.
  - k_roy 2y ago
    > Duplicate MACs are probably not even a 0.0001% of all MACs. I love it when people just make up numbers with zero backing. You know MACs only HAVE to be unique on the same L2 segment right? So with every device that has MAC addresses (including every Bluetooth or WiFi device), ESP32s, home assistant type stuff, all which have usually 2 or more MACs, do you really think it makes sense for a manufacturer to use a MAC once and never again? No. It’s called manufacturing and shipping logistics. It’s far easier than what you suggest. As far as your made up stat here, I should play the lottery because it’s happened at least two times over the course of a 30 year career. In 2006, I was part of a team building up a data center, and each server needed 4 NICs for iscsi speed and redundancy. Two cases out of 10, something like 40 or 50 NICs were identical to each other. The only reason we noticed is because this job required meticulous asset tracking. My guess is because we had ordered so many NICs, the supplier had needed to hunt a little to fill the order. The second time was when I ordered a lot of ProBooks off eBay for hackintoshing back around 2012. Again, at least two of them had the same physical MAC burned into the motherboard. And I’m guessing it’s because about half of them came from Florida and the other half came from Vancouver. I’m just telling you, MAC addresses aren’t as unique as you are trying to suggest because they don’t need to be.
    - cyberax 2y ago
      > I love it when people just make up numbers with zero backing. Well, can YOU provide references to duplicate MACs? I worked all my career with probably tens of thousands of devices, often in large broadcast domains, and I have never seen a duplicate MAC. Ever.
- throw0101c 2y ago
  > Nobody is tracking 48 bits out of 128 bits and tying that to a specific user. You'd be surprised. I allow cookies from Youtube for better preference recommendations, but am not logged in. You'd think that that would give me useful ads. However, I am with an ISP that services both the provinces of Ontario (English) and Quebec (French), and when my IP cycles if I reboot I sometimes I get an IP that is geo-located to Quebec and so I suddenly I get French-only ads until the new router reboot.
- ThePowerOfFuet 2y ago
  >I say this as a person who received a case of Intel NICs back in the day and every MAC was the same. On the labels too, or just in the EEPROMs?
  - k_roy 2y ago
    I should have clarified. All the MACs in one case were identical to the MACs in a second case And both labels and burned in