Okay, thanks for the tip. I have 64-bit Chromium v.107 on Linux, and in the protocol column I see “h2” for every element on the page. Hmm.
Edit
I edited my Caddyfile to include,
{
admin off
servers {
protocols h3
}
}
But even though Caddy is fine with that config, and reloads fine, I can’t load the site in a browser anymore. Now I’m more confused.
Nov 21 23:55:27 thor caddy[594]: {"level":"info","ts":1669103727.009503,"msg":"using provided configuration","config_file":"/etc/caddy/Caddyfile","config_adapter":""}
Nov 21 23:55:27 thor caddy[594]: {"level":"warn","ts":1669103727.0116642,"msg":"Caddyfile input is not formatted; run the 'caddy fmt' command to fix inconsistencies","adapter":"caddyfile","file":"/etc/caddy/Caddyfile","line":2}
Nov 21 23:55:27 thor caddy[594]: {"level":"warn","ts":1669103727.0128446,"logger":"admin","msg":"admin endpoint disabled"}
Nov 21 23:55:27 thor caddy[594]: {"level":"info","ts":1669103727.013231,"logger":"http","msg":"server is listening only on the HTTPS port but has no TLS connection policies; adding one to enable TLS","server_name":"srv0","https_port":443}
Nov 21 23:55:27 thor caddy[594]: {"level":"info","ts":1669103727.0134025,"logger":"http","msg":"enabling automatic HTTP->HTTPS redirects","server_name":"srv0"}
Nov 21 23:55:27 thor caddy[594]: {"level":"info","ts":1669103727.0145423,"logger":"http.log","msg":"server running","name":"remaining_auto_https_redirects","protocols":["h1","h2","h3"]}
Nov 21 23:55:27 thor caddy[594]: {"level":"info","ts":1669103727.0146716,"logger":"http","msg":"enabling HTTP/3 listener","addr":":443"}
Nov 21 23:55:27 thor caddy[594]: {"level":"info","ts":1669103727.014844,"msg":"failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/lucas-clemente/quic-go/wiki/UDP-Receive-Buffer-Size for details."}
Nov 21 23:55:27 thor caddy[594]: {"level":"info","ts":1669103727.016157,"logger":"http.log","msg":"server running","name":"srv0","protocols":["h3"]}