ooh, i get why you don’t understand. After seeing that it did work with godaddy i immediately switched back to Cloudflare to see if that would break everything again. And it did. I didn’t expect you to check it right now. I should have mentioned that.
All right, but it is not a DNS issue anyhow, it’s a network issue.
seems likely yet i dont understand what exactly is the issue if it does work with other nameservers but not with the Cloudflare ones. That eliminates things like incorrect port forwarding, blocked ports by isp, incorrrect web server config etc. What options are left?
Well, I can’t comment on what worked and what that DNS configuration is, but you did not have a DNS issue before but solely a network one (assuming the IP address was correct, of course).
I can really only reiterate what I wrote before.
ok, what would cause a network to suddenly reject a connection that was perfect a week ago? i have no iptables rules set, no rate limiting, enough resources and bandwith on the server…
As I said, it might be your ISP. But as long as your server does not respond, it obviously can’t work. If you need further advice on that, it would be best to check out StackExchange or Reddit, as server administration is beyond the scope of the forum.
But the server does respond though, I can ping it and using different nameservers allowed me to visit the site on 4g, so outside of the home network. Which leaves all the parts of the chain that get added when using Cloudflare. Or am i mistaken?
Well, that’s the point we already discussed seven hours ago 
it does not respond, hence the suggestion you check Sitemeer. A ping is relatively useless in this context, as it needs to respond to a TCP connection.
Once more, follow the steps I mentioned earlier and it should work.
“fix your firewall or server configuration” i guess that’s the main question: what do i need to change when it seems to work with everything except Cloudflare atm?
As I mentioned, that’s something for StackExchange or Reddit, not Cloudflare. Cloudflare is not involved here, because your server does not respond in the first place. All Cloudflare does is provide the DNS resolution, which works and resolves the correct address.
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