Site isn´t served as HTTP/2

Hey Guys,

I´am using Caddy, but my site is serving over http/1.1. But i dont know why…
H2 is the default for Caddy, or?

In my Configfile i have add following keywords:

tls EMAIL {
alpn h2

Have everyone an little hint for me?

Thank You

Does that still happen if you take out the alpn line?

Yep… it still happen…

What is your full, unredacted Caddyfile? And how are you running Caddy?

Here is the Caddyfile…


You can test it on

I´am running Caddy on Debian 9 as a Service:

ExecStart=/usr/local/bin/caddy -log stdout -agree=true -conf=/etc/caddy/Caddyfile -root=/var/tmp

Thanks - I just tried it out. It’s showing h2 for me.

Hmpf… Firefox showing me this as well


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