Create self-signed SSL certificate for Nginx

gistfile1.sh

#!/bin/bash
echo "Generating an SSL private key to sign your certificate..."
openssl genrsa -des3 -out myssl.key 1024

echo "Generating a Certificate Signing Request..."
openssl req -new -key myssl.key -out myssl.csr

echo "Removing passphrase from key (for nginx)..."
cp myssl.key myssl.key.org
openssl rsa -in myssl.key.org -out myssl.key
rm myssl.key.org

echo "Generating certificate..."
openssl x509 -req -days 365 -in myssl.csr -signkey myssl.key -out myssl.crt

echo "Copying certificate (myssl.crt) to /etc/ssl/certs/"
mkdir -p  /etc/ssl/certs
cp myssl.crt /etc/ssl/certs/

echo "Copying key (myssl.key) to /etc/ssl/private/"
mkdir -p  /etc/ssl/private
cp myssl.key /etc/ssl/private/

As to the Nginx configuration, I got a warning
nginx: [warn] the "ssl" directive is deprecated, use the "listen ... ssl" directive instead in /usr/local/etc/nginx/sites-enabled/local.mysite.com:8

I just removed the ssl on; part and the warning is gone.

In other words, it should be something like this:

server {
    listen               443 ssl;
    ssl_certificate      /etc/ssl/certs/myssl.crt;
    ssl_certificate_key  /etc/ssl/private/myssl.key;
    server_name SERVER_NAME.com;
    location / {
    }
}

Good morning, is it necessary to have a domain to apply this method of generating ssl self-signed certificate?

Because in my company it is handled is url type https://10.164.7.203:37006/PruebaHTTPS

If someone got the next error:

# nginx -t

nginx: [emerg] SSL_CTX_use_certificate("/etc/ssl/certs/myssl.crt") failed (SSL: error:140AB18F:SSL routines:SSL_CTX_use_certificate:ee key too small)
nginx: configuration file /etc/nginx/nginx.conf test failed

You have to change the length of your certificate from rsa:1024 to rsa:2048