How To Create a SSL Certificate on Apache for CentOS 6

1. Install Mod SSL

In order to set up the self signed certificate, be sure that Apache and Mod SSL are installed on our VPS. You can install both with one command:

yum install mod_ssl

2. Create a New Directory

Now, we need to create a new directory where we will store the server key and certificate.

mkdir /etc/httpd/ssl

3. Create a Self Signed Certificate

When we request a new certificate, we can specify how long the certificate should remain valid by changing the 365 to the number of days we prefer. As it stands this certificate will expire after one year.

openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/httpd/ssl/apache.key -out /etc/httpd/ssl/apache.crt

With this command, we will be both creating the self-signed SSL certificate and the server key that protects it, and placing both of them into the new directory you just created.

This command will prompt terminal to display a lists of fields that need to be filled in.

The most important line is “Common Name”. Enter your official domain name here or, if you don’t have one yet, your site’s IP address.

You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
Country Name (2 letter code) [AU]:RO
State or Province Name (full name) [Some-State]:Bucharest
Locality Name (eg, city) []:BUC
Organization Name (eg, company) [Internet Widgits Pty Ltd]:Mycompany SA
Organizational Unit Name (eg, section) []:Dept of Joy
Common Name (e.g. server FQDN or YOUR name) []                  
Email Address []:[email protected]

4. Set Up the Certificate

The next thing to do is to set up the virtual hosts to display the new certificate.

Open up the SSL config file:

 nano /etc/httpd/conf.d/ssl.conf

Find the section that begins with <VirtualHost _default_:443> and make some quick changes.

Uncomment the DocumentRoot and ServerName line and replace with your DNS approved domain name or server IP address (it should be the same as the common name on the certificate):


Find the following three lines, and make sure that they match the extensions below:

SSLEngine on
SSLCertificateFile /etc/httpd/ssl/apache.crt
SSLCertificateKeyFile /etc/httpd/ssl/apache.key

Your virtual host is now all set up! Save and Exit out of the file.

5. Restart Apache

Restart the Apache server so the new settings to apply.

 /etc/init.d/httpd restart

Type in your browser https://youraddress to view the new certificate.