Tightening TLS security

Go to https://www.ssllabs.com/ssltest/analyze.html and test the security on your server.

Then follow the suggestions to improve it.

nginx

The test guided me to https://weakdh.org/sysadmin.html where I looked up my nginx server.

I had to create a dhparams.pem file by running "openssl dhparam -out dhparams.pem 2048"

And I added some lines to my nginx set up. That brought my grade up from B to A+.

These are the lines that I added to nginx configuration for my SSL site.

   ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
   ssl_prefer_server_ciphers on;
   ssl_dhparam /etc/ssl/dhparam.pem;

tomcat8

Still working on this one. I had to install non-export JAR files from Oracle. But I still don't have the basic set up working!

Key conversion

It's a pain, if you don't create the key pair in keytool in the first place you have to trick it

https://stackoverflow.com/questions/906402/importing-an-existing-x509-certificate-and-private-key-in-java-keystore-to-use-i