Question how to investigate sites that do not open / resolve

[Japhys]

Not really an issue, more a question. First of all this is really cool, I got this working with pretty basic knowledge of vps / vpn and docker. Pretty much all sites work. I do get a captcha for Google, probably because Racknerd gave me an ip with was previously abused. Anyway, I noticed ALL sites of DPG media are giving http2 errors. Disabling Adguard doesn't help, makes aense. Like I said pretty much all other sites work so I find this quite interesting. Is there a way to find out what causes this?

All the sites mentioned here do not work

https://nl.m.wikipedia.org/wiki/DPG_Media

[notthebee]

What happens if you curl the websites directly on the VPS?

[Japhys]

In the above case I get

curl: (92) HTTP/2 stream 0 was not closed cleanly: INTERNAL_ERROR (err 2)

So I guess nothing to do with the wireguard setup?

[Japhys]

Exact same setup, different datacenter, new ip. No problems whatsoever anymore. Big plus: latency and speed is so much better. This is good enough to be permanently switched on. Thanks so much @notthebee. I enjoy your work/YouTube. Learning a lot