Create the certificate:
$ sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/ssl/private/nginx-selfsigned.key -out /etc/ssl/certs/nginx-selfsigned.crt
Create a strong Diffie-Hellman group:
$ sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048
Create a new configuration snippet file for Nginx:
$ sudo nano /etc/nginx/snippets/self-signed.conf
Add:
ssl_certificate /etc/ssl/certs/nginx-selfsigned.crt;
ssl_certificate_key /etc/ssl/private/nginx-selfsigned.key;
Create a configuration snippet with strong encryption settings:
$ sudo vim /etc/nginx/snippets/ssl-params.conf
Add:
# from https://cipherli.st/
# and https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH";
ssl_ecdh_curve secp384r1;
ssl_session_cache shared:SSL:10m;
ssl_session_tickets off;
#ssl_stapling on;
#ssl_stapling_verify on;
resolver 8.8.8.8 8.8.4.4 valid=300s;
resolver_timeout 5s;
# Disable preloading HSTS for now. You can use the commented out header line that includes
# the "preload" directive if you understand the implications.
#add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
#add_header Strict-Transport-Security "max-age=63072000; includeSubdomains";
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
ssl_dhparam /etc/ssl/certs/dhparam.pem;
Configure Nginx site to use certificate:
server {
listen 443 ssl;
server_name example.com;
include snippets/self-signed.conf;
include snippets/ssl-params.conf;
#...
}
From local computer, download the certificate:
$ scp user@host:/etc/ssl/certs/nginx-selfsigned.crt ~/cert.crt
Open the file with the Keychain Access utility:
$ open cert.crt
- Add the certificate to the System keychain (not login), authenticate.
- After it has been added, double-click it, authenticate again.
- Expand the "Trust" section.
- Set "When using this certificate" to "Always Trust"
That's it! Close Keychain Access and restart Chrome, and your self-signed certificate should be recognized now by the browser.
Sources :