this post was submitted on 15 Apr 2025
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[–] AstralPath@lemmy.ca 61 points 1 week ago (7 children)

Correct me if I'm wrong but ISPs dynamically assign WAN IPs to the vast majority of their non-enterprise consumer base, right? If that's the case, how would historical posts on 4chan have any relevant data to dox someone with? Wouldn't the window of opportunity have passed for pretty much everything older than a few weeks?

[–] mlg@lemmy.world 49 points 1 week ago (2 children)

Every ISP I've dealt with thus far has kept me on the same dynamic IP for years on end.

Only once did it actually change for me, and it was seemingly random so I assume they must have updated the lease block range.

It kind of makes sense because if some 3 letter agency asks for a historical lookup, they have less data they need to store compared to constantly rotating IPs to everyone.

[–] Creat@discuss.tchncs.de 17 points 1 week ago

This is highly dependent on where you are, and your ISP. I get new IPs basically daily. Even my ipv6 prefix changes daily for no reason other than to be annoying I guess. It's infuriating, but somewhat convenient for privacy reasons (only).

[–] HeyJoe@lemmy.world 6 points 1 week ago (1 children)

Were I live, it updates at least once a month and i think its on purpose. If you want a static IP, you gotta buy the business plan. I do host stuff so instead of spending the extra $200 or so a month for that plan I just use DDNS with my domain and setup a small app that the domain provider gives which periodically checks your public IP and changes it where your DNS settings are hosted.

[–] RisingSwell@lemmy.dbzer0.com 2 points 1 week ago

It was a pain when my friend used to set up Minecraft servers. New month? Well shit time to fix the server again.

[–] andrew@lemmy.stuart.fun 36 points 1 week ago* (last edited 1 week ago) (1 children)

It's not super useful for doxing by normies necessarily but you better believe ISPs also log which customer gets which IP and keep that historical data (because they can definitely send copyright notices for torrent seeding) and law enforcement can subpoena or sometimes just ask nicely for historical IP data.

And that's a dangerous thing when regimes come to power and want certain speech squashed, especially if you believe you're reasonably anonymized.

ISPs also log which customer gets which IP and keep that historical data

I can confirm that not only is this true, but it's been this way since the 1990's. The metadata correlates the IP address, date/time information, and customer account number. It's highly likely that any given ISP will have this data going back years, if not decades. It really doesn't take up much space.

I can also confirm the "just ask nicely" part. I've seen it with my own eyes that it really comes down the scruples of the people guarding said data. There exists no law that prevents that information from being disclosed to anyone.

[–] mannycalavera@feddit.uk 14 points 1 week ago

Sir. This is a meme community. Please refrain from making sense.

[–] synicalx@lemm.ee 5 points 1 week ago

Yep and even better than that; most if not all residential ISPs use Carrier-grade NAT so one IP (which changes), now represents hundreds if not tens of thousands of their customers.

At the very best, you could maybe narrow an IP to a very vague geographical area like several suburbs, or a specific town maybe.

[–] otacon239@lemmy.world 3 points 1 week ago

If it’s serious enough, I’m sure they could trace it back with a request to the ISP. I’d have to imagine they keep a log of everything.

[–] 30p87@feddit.org 3 points 1 week ago

Well yeah. IPs are basically worthless nowadays. As in, if you have a public v4 address you probably have a domain registered to that IP anyway. And v6 addresses can be changed on request too.

[–] lurch@sh.itjust.works 16 points 1 week ago (2 children)

isn't blocking the IP their first step in banning someone?

[–] snausagesinablanket@lemmy.world 12 points 1 week ago (1 children)

No its usually a last step.

[–] deegeese@sopuli.xyz 7 points 1 week ago

But logging all visitor IPs is the 0th step.

[–] retiolus@mamot.fr 1 points 1 week ago

@lurch if you don't have user accounts, yup, that should be it

[–] TrickDacy@lemmy.world 16 points 1 week ago (1 children)

4chan was built as a place where horrible people feel safe to be horrible and some shit about IP logging ought to be the last fucking thing mentioned about it. Fuck 4chan.

[–] Hansae@lemmy.dbzer0.com 11 points 1 week ago (2 children)

It wasnt.

Source: used to use it for years before it went down the toilet after 2016.

[–] Mustakrakish@lemmy.world 3 points 1 week ago (1 children)

It was shit and horrible then too. I used it in the past when I was a stupid kid, before I grew up and had a fully formed brain, and even I recognized the awfulness of it then, and even it taking a hard right shift in 2008-2009 when I quit.

[–] Hansae@lemmy.dbzer0.com 1 points 1 week ago

Its gotten worse, its in many ways a product of its time wherein the internet was truly a wild west with few rules. Im not entirely sure what to think of its legacy if this does kill it, I don't think 4Chan was purely bad not by a long shot and ultimately those who used it will find other places to exist but I will gladly admit that that website has been responsible for some horrific shit.

[–] TrickDacy@lemmy.world -2 points 1 week ago

Ok, correction then, it was built in a way that allowed horribleness. Moderation is important.

[–] obsidianfoxxy7870@lemmy.blahaj.zone 11 points 1 week ago (2 children)

TBH, if you just use a decent VPN (thats truly private) then this doesn't matter. Which is something you should be doing anyways.

[–] Spezi@feddit.org 9 points 1 week ago (1 children)

This comment is sponsored by NordVPN™

Funny you say that. I despise Nord VPN and consider them HIGHLY unethical. Also they aren't truly private because they want a bunch of infromation when signing up.

Any VPN that I see a lot of ads for and other content for makes them come off as sketchy.

[–] smee@poeng.link 2 points 1 week ago (1 children)

4chan have range banned all VPNs for years. Even smaller ones like AirVPN. That's when people should know it's a honeypot.

[–] untakenusername@sh.itjust.works 1 points 4 days ago (1 children)
[–] smee@poeng.link 1 points 4 days ago

Was years since the last time I was able to post on 4chan via TOR. I guess experience may vary.

[–] stinky@redlemmy.com 11 points 1 week ago (1 children)

it's necessary to ban users who post illegal stuff, you need the ability to ban them and remove content that they created, even though every post is anonymous

[–] Kennystillalive@feddit.org 4 points 1 week ago (2 children)

Wait, what gets you banned on 4chan? With the amount of vile stuff originating from it I'm surprised they ban people.

[–] themagzuz@lemmy.blahaj.zone 7 points 1 week ago (1 children)

i think it's basically just illegal shit and the worst sin of all, off-topic posts

[–] TrickDacy@lemmy.world 1 points 1 week ago

That's not what I know 4chan for. I know them for moral corruption and illegal content.

[–] GhostedIC@sh.itjust.works 3 points 1 week ago

4chan today is more moderated than Reddit in 2012.

[–] javiwhite@feddit.uk 7 points 1 week ago

This is what jack Dorsey and Elon Musk were really referring to.

Ban IPs!

*Sent from my IPv6 enabled device. *