Issue nginx http/2 chrome 49 win xp

[Kapnos]

Hi,

I successfully migrated my wordpress site using http/2 with ssl certificate but clients with chrome 49 (which is the latest version for win xp) cannot reach the site. Is there any workaround?
Thanks!

 

[Bitpalast]

https://www.nginx.com/blog/supporting-http2-google-chrome-users/

 

[Kapnos]

My server runs on Ubuntu 14.04.5 and the nginx version:
nginx version: nginx/1.11.4
built with OpenSSL 1.0.2j 26 Sep 2016
TLS SNI support enabled

The problem is not the OpenSSL version, I think the problem has to do with the Ciphers suites used my nginx.

As I see in /etc/nginx/conf.d/ssl.conf:

ssl_ciphers HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

And proposing ciphers on Mozilla site https://mozilla.github.io/server-side-tls/ssl-config-generator/:
ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256';

Should I use?
plesk sbin sslmng --services=nginx --custom --ciphers="ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256"

and then should I restart nginx and apache?

 

[themew]

Add this to your NGINX section in Plesk and Chrome 49 will work:

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers 'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384HE-RSA-AES128-GCM-SHA256HE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA:ECDHE-RSA-AES256-SHAHE-RSA-AES128-SHA256HE-RSA-AES128-SHAHE-RSA-AES256-SHA256HE-RSA-AES256-SHA:ECDHE-ECDSA-DES-CBC3-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHAES-CBC3-SHA:!DSS';
ssl_prefer_server_ciphers on;

Test on https://www.ssllabs.com/ssltest/analyze.html for a list of all browsers and how well your server's ciphers are configured.