{
    local_certs
    admin localhost:2019
    servers {
        protocols h1 h2
        listener_wrappers {
            layer4 {
                @turns tls sni turns.example.test
                route @turns {
                    proxy tcp/coturn.internal:5349
                }
            }
            tls
        }
    }
}

example.test {
    tls internal

    header {
        -Via
        -Alt-Svc
        -Server
    }

    respond "PoC app response OK" 200
}

turns.example.test {
    tls internal
    respond "This SNI is routed to coturn by caddy-l4. You should not see this." 421
}