HTTP/2 on Apache (Ubuntu 14.04) does not work - apache

Question

I've tried many tutorials how to enable http2 on apache server; e.g.:
http://pixelinc.co/ubuntu-14-04-3-apache-http-2-web-server-setup/
https://www.gatherdigital.co.uk/community/post/how-to-setup-http-2-support/41
https://icing.github.io/mod_h2/howto.html
https://www.youtube.com/watch?v=8OM_eqRAsMM
etc...
But without success.
Here is my configuration:
$ apache2 -v
Server version: Apache/2.4.23 (Ubuntu)
$ apachectl -M
Loaded Modules:
...
http2_module (shared)
...
ssl_module (shared)
...
Here is my /etc/apache2/sites-available/default-ssl.conf
<IfModule mod_ssl.c>
<VirtualHost *:443>
ServerAdmin info#example.net
DocumentRoot /var/www/html
ServerName example.net
ServerAlias www.example.net
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
ProxyPassMatch ^/(.*\.php(/.*)?)$ fcgi://127.0.0.1:9000/var/www/html/$1
Protocols h2 http/1.1
SSLEngine on
SSLCertificateFile /etc/apache2/ssl/apache.crt
SSLCertificateKeyFile /etc/apache2/ssl/apache.key
<FilesMatch "\.(cgi|shtml|phtml|php)$">
SSLOptions +StdEnvVars
</FilesMatch>
<Directory /usr/lib/cgi-bin>
SSLOptions +StdEnvVars
</Directory>
BrowserMatch "MSIE [2-6]" \
nokeepalive ssl-unclean-shutdown \
downgrade-1.0 force-response-1.0
BrowserMatch "MSIE [17-9]" ssl-unclean-shutdown
</VirtualHost>
</IfModule>
When I'm trying load my page (https://example.net) in chrome, I can see this response header:
HTTP/1.1 200 OK
Date: Tue, 09 Aug 2016 12:05:08 GMT
Server: Apache/2.4.23 (Ubuntu)
Upgrade: h2
Connection: Upgrade, Keep-Alive
Last-Modified: Thu, 30 Jun 2016 14:22:30 GMT
ETag: "b18-5367f99a49580-gzip"
Accept-Ranges: bytes
Vary: Accept-Encoding
Content-Encoding: gzip
Content-Length: 538
Keep-Alive: timeout=5, max=100
Content-Type: text/html
Am I Missing something? Can you give me any hints?

Answer 1

Define "doesn't work". I see the upgrade header so looks good to me.
I suspect a problem with HTTPS setup.
Either you're in openssl 1.0.1 and using Chrome (which requires openssl 1.0.2 for ALPN support). Check it in Firefox or Opera to confirm.
Or 2 you're using older ciphers which are blacklisted under http/2. Add the following config to force decent HTTPS config where possible:
SSLProtocol all -SSLv2 -SSLv3
SSLHonorCipherOrder on
SSLCipherSuite "EECDH+AES128:EECDH+AES256:+SHA:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:RSA+3DES:!DSS"

Answer 2

Update Ubuntu 14.04 to 16.04 did it!

Answer 3

Have you added Protocols h2 h2c http/1.1 to /etc/apache2/apache2.conf ?
This have worked for me.
Before it was only in the sites-enabled conf.