https://tools.keycdn.com/http2-test说：
HTTP/2 Test Result
Yeah! domain.com supports HTTP/2.0.
ALPN supported.
在域配置中：
listen 443 ssl http2;
NGINX-V 来自https://launchpad.net/~ondrej/+archive/ubuntu/nginx-mainline：
nginx version: nginx/1.11.6
built with OpenSSL 1.0.2j 26 Sep 2016
TLS SNI support enabled
configure arguments:
--with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2'
--with-ld-opt='-Wl,-Bsymbolic-functions -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
--modules-path=/usr/lib/nginx/modules
--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-http_ssl_module
--with-http_stub_status_module
--with-http_realip_module
--with-http_auth_request_module
--with-http_v2_module
--with-http_spdy_module
--with-http_dav_module
--with-http_slice_module
--with-threads
--with-http_addition_module
--with-http_geoip_module=dynamic
--with-http_gunzip_module
--with-http_gzip_static_module
--with-http_image_filter_module=dynamic
--with-http_sub_module
--with-http_xslt_module=dynamic
--with-stream=dynamic
--with-stream_ssl_module
--with-mail=dynamic
--with-mail_ssl_module
--add-dynamic-module=/build/nginx-QXPftz/nginx-1.11.6/debian/modules/nginx-auth-pam
--add-dynamic-module=/build/nginx-QXPftz/nginx-1.11.6/debian/modules/nginx-dav-ext-module
--add-dynamic-module=/build/nginx-QXPftz/nginx-1.11.6/debian/modules/nginx-echo
--add-dynamic-module=/build/nginx-QXPftz/nginx-1.11.6/debian/modules/nginx-upstream-fair
--add-dynamic-module=/build/nginx-QXPftz/nginx-1.11.6/debian/modules/ngx_http_substitutions_filter_module
但我在 Chrome 中仍然看到一个灰色图标SPDY Indicator