[root@debian:~]# curl -v --http3-only -s -S https://www.google.com/
* Host www.google.com:443 was resolved.
* IPv6: 2a00:1450:4002:403::2004
* IPv4: 142.250.180.164
*   Trying [2a00:1450:4002:403::2004]:443...
* Immediate connect fail for 2a00:1450:4002:403::2004: La rete non è raggiungibile
*   Trying 142.250.180.164:443...
*  CAfile: /etc/ssl/certs/ca-certificates.crt
*  CApath: /etc/ssl/certs
* Server certificate:
*  subject: CN=*.google.com
*  start date: Jul  7 08:34:03 2025 GMT
*  expire date: Sep 29 08:34:02 2025 GMT
*  subjectAltName: host "www.google.com" matched cert's "*.google.com"
*  issuer: C=US; O=Google Trust Services; CN=WR2
*  SSL certificate verify ok.
*   Certificate level 0: Public key type EC/prime256v1 (256/128 Bits/secBits), signed using sha256WithRSAEncryption
*   Certificate level 1: Public key type RSA (2048/112 Bits/secBits), signed using sha256WithRSAEncryption
*   Certificate level 2: Public key type RSA (4096/152 Bits/secBits), signed using sha384WithRSAEncryption
* Established connection to www.google.com (142.250.180.164 port 443) from 192.168.0.2 port 46723 
* using HTTP/3
* [HTTP/3] [0] OPENED stream for https://www.google.com/
* [HTTP/3] [0] [:method: GET]
* [HTTP/3] [0] [:scheme: https]
* [HTTP/3] [0] [:authority: www.google.com]
* [HTTP/3] [0] [:path: /]
* [HTTP/3] [0] [user-agent: curl/8.16.0-rc1]
* [HTTP/3] [0] [accept: */*]
> GET / HTTP/3
> Host: www.google.com
> User-Agent: curl/8.16.0-rc1
> Accept: */*
> 
* Request completely sent off