I'm testing using our residential proxies.
It's a super cool tool, I've been wondering about an open source tool doing this since reading about the technique in one of Nikolai Tschacher's blog posts years ago (https://incolumitas.com/pages/about/).
There's a few ways to work around this, but I think it's one of the best signals available to detect low-effort/common proxy providers.
Oh I haven't seen that before, it's really cool, thank you for showing me that!
I want to clarify that the approaches are a bit different, they use IP intelligence too and this approach doesn't use any kind of websockets, which is a really good idea, and I have to admit I didn't think of that, but sadly it's not really possible to do it with Fastly.
Another big difference is that this could work with any TCP application, not only HTTP, and if you do it with HTTP/S you can know if it's a proxy or not on a request basis and totally passively, without adding any delay or changing the code of the app.
But yeah, it's a really cool demo, thanks again!
Would you be open to offering MASQUE proxying? I started to as support to GOST, been testing with Bright Data (only for UDP sadly, not TCP), but would love to see others add support so I could test with more than just 1 vendor.
https://github.com/go-gost/x/pull/75
https://github.com/go-gost/x/pull/76