Can you access https://yourdomain? Please pastebin the .htaccess file where you tried to set up redirection rules.

yes the site works directly via https and the latest htacces I tried was http://pastebin.com/7cHeV5YK. On http I'm getting 400 "The plain HTTP request was sent to HTTPS port"

Make sure mod_rewrite is enabled: ("sudo a2enmod rewrite && sudo service apache2 restart")

Try this in your .htaccess file:

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}

Also make sure AllowOverride is set to All in your virtualhost config.

Thanks, but Im using wordpress on nginx without apache installed

I solved my ssl issue by copying the working http block settings into the https server block and all is well now, thx again

.htaccess doesn't work with nginx - I thought you were using Apache.
I'm glad to hear you got it working properly! :]