My first thought was "is this legal?", but then had a hard time considering even which jurisdiction this (or using a "fraudulent" IP location) would fall under?

I've wanted to try something like this before, but I was under the impression that providers like MaxMind might use other techniques to figure out the "real" location of a server.

ipinfo.io uses a probe network for this[1], but even then a server physically located in the Netherlands with an IP announced as being from, say, Seychelles would still respond to pings faster from a European location than from somewhere like Singapore (unless you go out of your way to induce latency to ICMP responses).

[1] https://ipinfo.io/blog/probe-network-how-we-make-sure-our-da...

surprised to see a p3terx blog referene here. His CF WARP scripts were quite popular.

Some background info: in China, all online discourse are required to show the user's provincial-level origin, or country name for non-mainland users, using geoip. this is enforced by the Cyber Admin Commission of CCP.

This is going to be fun when the moon and Mars have internet.

The real question is where does Cloudflare get North Korean IPv4 blocks to feed into Warp, or Antarctic blocks for that matter.

This is a great post, I was asking about this for asn location to ChatGPT and it was telling me it wouldn’t help on this request lol.

But thanks to this series I setup an ARIN account, got allocated ipv6 and ipv4 addresses and starting the ASN assignment process. It’s a fun rabbit hole to go into.

> Now test your VPS’s IPv4 geolocation using Cloudflare’s /cdn-cgi/trace endpoint (available on any site behind CF)

Interesting, this really does seem to work on any site behind CF. Are there any other endpoints like this?

Yeah Geo-IP is "fake" when I look at this deeper, idk why people use this as source of truth

also important point when you using Starlink and got totally different "relay" station sometimes can be thousand miles away, I think we need to "upgrade" our internet infrastructure for interplanetary system

tl;dr it requires owning your own IP blocks and then lying.

> In reality, the “location” of an IP is inherently fuzzy. For instance, my 2a14:7c0:4d00::/40 block was originally allocated to Israel. But later, I bought parts of this range and announced them via BGP in Germany, the US, and Singapore (see previous article on Anycast networks). Meanwhile, I’m physically located in mainland China. As the owner of this IP block, I can also freely edit the country field in the WHOIS database — and I set it to KP (North Korea).

> Because of this ambiguity, it’s nearly impossible to precisely determine an IP’s location using any single technical method. As a result, almost all geolocation databases accept public/user-submitted correction requests.

I would not be surprised if this practice is technically against most terms of service.

> tl;dr it requires owning your own IP blocks and then lying.

If this was the case, and theres tons of financial incentive to do so, wouldnt cloudflare,etc, block not based on the reported 'country' but some fuzzy heuristic that knows what country it comes from? hops?