TLS 1.3 not being selected.

[shiz]

Hi,

I can't see what I'm doing wrong.

When I visit https://www.cloudflare.com/ with my browser TLS 1.3 is used.

However when I visit my website, TLS 1.2 is selected instead.

My browser (opera 53) has this in its command line: "
--ssl-version-max=tls1.3 --tls13-variant=draft"

Nginx is compiled like this:

nginx version: nginx/1.14.0
built with OpenSSL 1.1.1-pre7 (beta) 29 May 2018
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fPIE -fstack-protector-strong
-Wformat -Werror=format-security -D_FORTIFY_SOURCE=2' --with-ld-opt='-fPIE
-pie -Wl,-z,relro -Wl,-z,now' --prefix=/usr/share/nginx
--conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log
--error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock
--pid-path=/run/nginx.pid --http-client-body-temp-path=/var/lib/nginx/body
--http-fastcgi-temp-path=/var/lib/nginx/fastcgi
--http-proxy-temp-path=/var/lib/nginx/proxy
--http-scgi-temp-path=/var/lib/nginx/scgi
--http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit
--with-ipv6 --with-http_ssl_module --with-http_stub_status_module
--with-http_realip_module --with-http_auth_request_module
--with-http_addition_module --with-http_dav_module --with-http_geoip_module
--with-http_gunzip_module --with-http_gzip_static_module
--with-http_image_filter_module --with-http_v2_module --with-http_sub_module
--with-http_xslt_module --with-stream --with-stream_ssl_module --with-mail
--with-mail_ssl_module --with-threads
--add-module=/usr/local/src/nginx/nginx-1.14.0/debian/modules/nginx-auth-pam
--add-module=/usr/local/src/nginx/nginx-1.14.0/debian/modules/nginx-cache-purge
--add-module=/usr/local/src/nginx/nginx-1.14.0/debian/modules/nginx-dav-ext-module
--add-module=/usr/local/src/nginx/nginx-1.14.0/debian/modules/nginx-echo
--add-module=/usr/local/src/nginx/nginx-1.14.0/debian/modules/ngx_http_substitutions_filter_module
--add-module=/usr/local/src/ngx_brotli --with-openssl-opt=enable-tls1_3

testssl.sh does report TLS 1.3:

./testssl.sh -p www.ts-export.com

###########################################################
    testssl.sh       3.0beta from https://testssl.sh/dev/
    (f426a3b 2018-05-23 15:09:03 -- )

      This program is free software. Distribution and
             modification under GPLv2 permitted.
      USAGE w/o ANY WARRANTY. USE IT AT YOUR OWN RISK!

       Please file bugs @ https://testssl.sh/bugs/

###########################################################

 Using "OpenSSL 1.0.2-chacha (1.0.2i-dev)" [~183 ciphers]
 on NC-PH-0657-10:./bin/openssl.Linux.x86_64
 (built: "Jun 22 19:32:29 2016", platform: "linux-x86_64")


 Start 2018-06-02 21:16:10        -->> 209.188.18.190:443
(www.ts-export.com) <<--

 rDNS (209.188.18.190):  ts-export.com.
 Service detected:       HTTP


 Testing protocols via sockets except NPN+ALPN

 SSLv2      not offered (OK)
 SSLv3      not offered (OK)
 TLS 1      offered
 TLS 1.1    offered
 TLS 1.2    offered (OK)
 TLS 1.3    offered (OK): draft 28, draft 27, draft 26
 NPN/SPDY   h2, http/1.1 (advertised)
 ALPN/HTTP2 h2, http/1.1 (offered)

 Done 2018-06-02 21:16:17 [   9s] -->> 209.188.18.190:443
(www.ts-export.com) <<--


Pertinent part of my configuration:

ssl_protocols TLSv1 TLSv1.1 TLSv1.2 TLSv1.3;
ssl_prefer_server_ciphers on;                                          
ssl_session_cache shared:SSL:20m;
ssl_session_timeout 10m;                                                    
                                                                 
ssl_ciphers
'TLS13-AES-128-GCM-SHA256:TLS13-AES-256-GCM-SHA384:TLS13-CHACHA20-POLY1305-SHA256:TLS13-AES-128-GCM-SHA256:TLS13-AES-128-CCM-8-SHA256:TLS13-AES-128-CCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA:ECDHE-ECDSA-AES128-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA256:CAMELLIA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!RSA:!MD5:!PSK:!aECDH';
ssl_ecdh_curve secp384r1;
                                                                            
                                                                            
                                                                            
                               ssl_stapling on;
ssl_stapling_verify on;                              

Any suggestion?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,280017,280017#msg-280017