I spent a week without IPv4 to understand IPv6 transition mechanisms

Re:I spent a week without IPv4 to understand IPv6 transition... by Faark on Monday March 06, 2023 @05:48PM (#35048889)

And what computer is making what requests. Now that i think about it, this cloud be the reason why youtube started making recommendations based on stuff i just watched in private browser tabs...

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Re:I spent a week without IPv4 to understand IPv6 transition... by josephg on Monday March 06, 2023 @06:31PM (#35049380)

I have multiple computers in the house, mostly not logged in to Google. YouTube recommendations spill between devices all the time - like, if I watch a video on one device, I’ll see the same video recommended on another. Or if my partner watches something, YouTube will recommend it to me.

They’re obviously doing recommendations based on IP address. (And this is purely over ipv4).

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Re:I spent a week without IPv4 to understand IPv6 transition... by throw0101c on Monday March 06, 2023 @07:35PM (#35049945)

> They’re obviously doing recommendations based on IP address. (And this is purely over ipv4).

I have IPv6 at home and connect to Youtube over IPv6 (that's generally the default behaviour on macOS and many other OSes). I reboot my DSL modem-router every night and get a new IPv4 address and new IPv6 prefix every day.

Now: I live in Ontario, and my ISP is based in Ontario, but they serve clients in Quebec. Every so often, when surfing Youtube, I get served ads in French because according to my (IPv6) address I am "in" Quebec.

And, while I am not logged into any Google service, I do not block cookies. So even with cookies, Youtube seems to be fairly dumb about serving ads correctly just based on IP addresses (or at least IPv6 addresses and/or IPv6 prefixes), since cookies don't seem to be useful.

So I'm not quite sure about what people are talking about when they say "IPv6 tracking" if even Google/Youtube can't get their act together.

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Re:I spent a week without IPv4 to understand IPv6 transition... by zeristor on Tuesday March 07, 2023 @04:00AM (#35053211)

I live just outside London and have been wondering why I’ve been getting ads from More4 for Wales and Cardiff.

Iechyd Da!

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Re:I spent a week without IPv4 to understand IPv6 transition... by Springtime on Monday March 06, 2023 @09:10PM (#35050635)

> They’re obviously doing recommendations based on IP address

eBay uses IPs showing content, too. I see 'items you've viewed recently' show items I've never looked at, since when on a mobile connection my IP changes fairly frequently and eBay carries over the recently viewed state from whoever else was previously using that IP.

It had puzzled me until I came across this[1] eBay topic where others had experienced this, from shared offices to spouses, etc.

[1] https://community.ebay.com/t5/Share-eBay-Technical-Issues/Re...

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Re:I spent a week without IPv4 to understand IPv6 transition... by throitallaway on Monday March 06, 2023 @05:52PM (#35048940)

Look at what Android does with MAC address randomization on wireless networks. We will probably see something similar with IPv6.

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Re:I spent a week without IPv4 to understand IPv6 transition... by CaliforniaKarl on Monday March 06, 2023 @06:07PM (#35049121)

> We will probably see something similar with IPv6.

It's been available for some time: https://www.internetsociety.org/resources/deploy360/2014/pri...

On my macOS system, I currently have four IPv6 IPs (excluding the link-local IP), all of which are random.

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Re:I spent a week without IPv4 to understand IPv6 transition... by gerdesj on Monday March 06, 2023 @06:47PM (#35049545)

Not just Android. My laptop does it too (NetworkManager). That's just IPv4 on devices designed to travel so it seems a fair thing to do. Bloody pain to diagnose why a static DHCP lease isn't working the first time, after that you find the mechanisms to turn it off. Nearly everything does it for IPv6, for a given value of everything!

For decades we have generally allowed all outbound and worried and fretted about and filtered inbound. I think it is time for us all to get a grip and do the job properly. However, with the delights of DNS over http and the like, the horse has not only bolted but has a new paint job, far better shoes than you can afford, eats grass that was prepared by a Michelin starred chef and belongs to someone else now.

We all need to be far more sophisticated about how traffic (knowledge/ideas/data) flows in and out of our networks/lives. Packet filtering is just one tool in the box and worrying about an addressing scheme being global (IPv6) instead of a weird hybrid (IPv4) is completely missing the real issue stabbing you in the nadgers.

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Re:I spent a week without IPv4 to understand IPv6 transition... by CaliforniaKarl on Monday March 06, 2023 @05:50PM (#35048916)

That's a very strong claim to make. I'd appreciate if you could provide a source to that statement!

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Re:I spent a week without IPv4 to understand IPv6 transition... by ipaddr on Monday March 06, 2023 @06:04PM (#35049089)

Your chrome build id is available in both areas. Not really a secret.

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Re:I spent a week without IPv4 to understand IPv6 transition... by CaliforniaKarl on Monday March 06, 2023 @06:09PM (#35049139)

I'd be really surprised if I've got a chrome build ID on my browser.

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