HTTP/3 (with QUIC) not working

Hi,

I switched on HTTP/3 (with QUIC) about 10 days ago, and then I checked https://http3check.net/ and it was working fine.

Today I check again, and it’s not working! I checked Cloudflare’s control panel and it is still on.

I get this message:

http|665x128

Could anyone explain me what could be happening? I did upgrade my server’s software (CentOS), WP, etc, but I reckon it has nothing to do with this issue.

Might be an issue with that service.

Your site checks out fine at https://gf.dev/http3-test as well as on Firefox

image

Thanks Sandro!

It seems to be that https://http3check.net/ isn’t working well. I didn’t even think that this could be the cause.

I donwloaded firefox nightly, that has an addon that shows http/3 pages, and mine has it activated. Also https://gf.dev/http3-test.

Well, thanks for your time!