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{{{
The listen directive in ngx_http_core_module module got 
a new parameter quic which enables HTTP/3 over QUIC on the specified port.

Along with the quic parameter it is also possible 
to specify the reuseport parameter to make it work properly with multiple workers. 
}}}

https://codedamn.com/news/backend/leveraging-http3-with-nginx

Step 4: Verify HTTP/3 Support

= HTTP/3 CHECK =

https://http3check.net/?host=moin.qmail.jp

Alt-Svc: h3=":443" を追加した。QUIC 接続を試みている様子。失敗している。-- ToshinoriMaeno <<DateTime(2023-11-20T07:20:16+0900)>>
{{{
moin.qmail.jp

HTTP/3 Check could not get establish a QUIC connection due to the error given below.

QUIC connection could not be established


HTTP Header

HTTP/1.1 200 OK
Server: nginx/1.25.3
Date: Sun, 19 Nov 2023 22:16:05 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Cookie, User-Agent, Accept-Language
Alt-Svc: h3=":443"
}}}

== history ==

{{{

moin.qmail.jp

HTTP/3 Check could not get the server's advertised QUIC versions due to the error given below.

Server does not advertise any alternative services.
}}}

HTTP Header
{{{
HTTP/1.1 200 OK
Server: nginx/1.25.3
Date: Sun, 19 Nov 2023 13:07:25 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Cookie, User-Agent, Accept-Language
}}}

== history ==
{{{
# ufw status
Status: active

To                         Action      From
--                         ------      ----
Anywhere                   ALLOW       ****            
443                        ALLOW       Anywhere                  

}}}
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