QUIC is not supported

Help
1

1. Caddy version:

2.6.3 (via docker)

2. How I installed, and run Caddy:

docker

a. System environment:

docker on Ubuntu 22.04

b. Command:

docker run -p 80:80 -p 443:443 -p 443:443/udp -v /home/ubuntu/caddy/Caddyfile:/etc/caddy/Caddyfile -v caddy_data:/data caddy:2.6.3

c. My complete Caddy config:

http3://caddy-qa.xyz.com {
     tls abcd@efgh.com
     respond "It workss!"
}

3. The problem I’m having:

Well, the http3 flow works, but it renders error that QUIC is not supported.
Something like below comes when I do http3 check

Attempted 4 connection(s).
Received packets for 4 connection(s).
Successful handshake for 2 connection(s).

4. What I already tried:

I have tried a bunch of changes in the Caddyfile, with server blocks, protocol blocks etc.

PS. all ports are open, for both UDP and TCP,

2

How are you testing it?

Caddy does not support old QUIC versions.

3

hello,I also encountered this problem.

I use this website for testing.

QUIC is not supported
HTTP/3 is supported

But I see other people’s caddy server website, but it supports QUIC.

Caddyfile

my.website {
  root * /usr/local/ServerStatus/web
  encode gzip quic
  file_server
}
4

That website is by LiteSpeed and only checks old versions of QUIC. New versions of Caddy only support http3. Modern browsers only support http3 at this point.

5

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