HTTP2の有効確認

Question

HTTP2の有効・無効と、無効な場合に必要なスペック確認をご教授願えないでしょうか？
※コマンドチェックできればと思います。

今のサーバ環境は以下になります。
※あと何が分かれば必須スペックを把握できておらず。
※何があれば有効なのかを把握できておりません。

●本番環境

CentOS
[XXXXX@YYYYY ~]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.9 (Maipo)

Apache
[XXXXX@YYYYY ~]$ httpd -v
Server version: Apache/2.4.6 (Red Hat Enterprise Linux)
Server built:   Oct  8 2020 21:27:40

開発環境

CentOS
[XXXXX@YYYYY ~]$ cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core) 

Apache
[XXXXX@YYYYY ~]$ httpd -v
Server version: Apache/2.4.6 (CentOS)
Server built:   Jul 18 2016 15:30:14

Answer 1

curlコマンドでプロトコルを指定してアクセスしてみるというのではどうでしょうか。

http1.1の場合

$ curl -I --http1.1 https://teratail.com
HTTP/1.1 200 OK
Server: nginx/1.19.5
Date: Mon, 04 Oct 2021 07:00:16 GMT
Content-Type: text/html; charset=UTF-8
X-FRAME-OPTIONS: SAMEORIGN
Set-Cookie: tt_stc=652719add119ff953c83e8808a2c31ad; expires=Sun, 02-Jan-2022 07:00:16 GMT; Max-Age=7776000; path=/
Set-Cookie: tt_sec=0c59b2005828fd08a2e200448388d6e5; path=/
Set-Cookie: DSID=83f49c50aeefaf238d11e36db34fc028; expires=Mon, 04-Oct-2021 11:00:16 GMT; Max-Age=14400; path=/; HttpOnly
Set-Cookie: tt_rpd=top; path=/
Set-Cookie: tt_stc=652719add119ff953c83e8808a2c31ad; expires=Sun, 02-Jan-2022 07:00:16 GMT; Max-Age=7776000; path=/
Set-Cookie: CakeCookie[hFd7M1i8]=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0; path=/; secure; HttpOnly
Set-Cookie: Cookies[uniqid]=Q2FrZQ%3D%3D.2XMOJr6yxBnwfmC7tDg%2FJ4YKj9vxWCTUVRBBDCMQpB4%3D; path=/; secure; HttpOnly
Set-Cookie: Cookies[referer]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
Set-Cookie: Cookies[referer_host]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
Set-Cookie: Cookies[sip]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
Set-Cookie: Cookies[url_query]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
Set-Cookie: Cookies[btn]=Q2FrZQ%3D%3D.nCwYQa7whkqx; path=/; secure; HttpOnly
Set-Cookie: Cookies[ab]=Q2FrZQ%3D%3D.iQ%3D%3D; expires=Sat, 02-Apr-2022 07:00:16 GMT; Max-Age=15552000; path=/; secure; HttpOnly
Accept-Ranges: none
Via: 1.1 google
Transfer-Encoding: ch

http2の場合

$ curl -I --http2 https://teratail.com
HTTP/2 200 
server: nginx/1.19.5
date: Mon, 04 Oct 2021 07:00:22 GMT
content-type: text/html; charset=UTF-8
x-frame-options: SAMEORIGN
set-cookie: tt_stc=d5412cc9ad7b7f1a7fc8c44f12c0dc7f; expires=Sun, 02-Jan-2022 07:00:21 GMT; Max-Age=7776000; path=/
set-cookie: tt_sec=51e2c74532ca28fbb27d006414d0fe38; path=/
set-cookie: DSID=970832247012508a59a657abef9b9e2b; expires=Mon, 04-Oct-2021 11:00:21 GMT; Max-Age=14400; path=/; HttpOnly
set-cookie: tt_rpd=top; path=/
set-cookie: tt_stc=d5412cc9ad7b7f1a7fc8c44f12c0dc7f; expires=Sun, 02-Jan-2022 07:00:22 GMT; Max-Age=7776000; path=/
set-cookie: CakeCookie[hFd7M1i8]=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0; path=/; secure; HttpOnly
set-cookie: Cookies[uniqid]=Q2FrZQ%3D%3D.3XpbKb%2B0kx31IzHh4jtuLNUMjoH%2FWyCBCUdIUHJDqRw%3D; path=/; secure; HttpOnly
set-cookie: Cookies[referer]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
set-cookie: Cookies[referer_host]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
set-cookie: Cookies[sip]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
set-cookie: Cookies[url_query]=Q2FrZQ%3D%3D.; path=/; secure; HttpOnly
set-cookie: Cookies[btn]=Q2FrZQ%3D%3D.nCwYQa7whkqx; path=/; secure; HttpOnly
set-cookie: Cookies[ab]=Q2FrZQ%3D%3D.iQ%3D%3D; expires=Sat, 02-Apr-2022 07:00:22 GMT; Max-Age=15552000; path=/; secure; HttpOnly
accept-ranges: none
via: 1.1 google
alt-svc: clear

なお、http2でアクセスする場合はssl (https://でのアクセス) が必須になります。

Comments

[JanTh1989]

ご回答がありがとうございます。
返答が遅くなり、申し訳ありません。

有効無効の確認が取れました。
ありがとうございました。