How to Install mod_ssl and SSL certificate on Oracle Linux

To Install mod_ssl and ssl certificate on Oracle Linux

Introduction :

A mod SSL library implements the SSL and TLS protocols to provide secure network communication. It may also support SSL v3 and TLS v1.x for Apache HTTP Server. This function implements cryptographic functions and provides utility functions.

Installation steps :

Step 1 : check the version of the OS

[root@linuxhelp ~]# cat /etc/os-release 
NAME="Oracle Linux Server"
VERSION="8.4"
ID="ol"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="8.4"
PLATFORM_ID="platform:el8"
PRETTY_NAME="Oracle Linux Server 8.4"
ANSI_COLOR="0;31"

Step 2 : Install the Apache

 [root@linuxhelp ~]# yum install httpd*
Last metadata expiration check: 0:02:46 ago on Saturday 11 December 2021 02:05:10 AM IST.
Dependencies resolved.
============================================================================================================================================
 Package                       Architecture      Version                                                 Repository                    Size
============================================================================================================================================
Installing:
 httpd                         x86_64            2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9             ol8_appstream                1.4 M
 httpd-devel                   x86_64            2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9             ol8_appstream                222 k
 httpd-filesystem              noarch            2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9             ol8_appstream                 40 k
 httpd-manual                  noarch            2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9             ol8_appstream                2.4 M
 httpd-tools                   x86_64            2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9             ol8_appstream                107 k
Installing dependencies:
 apr                           x86_64            1.6.3-12.el8                                            ol8_appstream                129 k
 apr-devel                     x86_64            1.6.3-12.el8                                            ol8_appstream                246 k
 apr-util                      x86_64            1.6.1-6.el8                                             ol8_appstream                105 k
 apr-util-devel                x86_64            1.6.1-6.el8                                             ol8_appstream                 86 k
 cyrus-sasl-devel              x86_64            2.1.27-5.el8                                            ol8_baseos_latest            128 k
 expat-devel                   x86_64            2.2.5-4.el8                                             ol8_baseos_latest             55 k
  httpd-tools-2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9.x86_64         libdb-devel-5.3.28-40.el8.x86_64                                  
  mod_http2-1.15.7-3.module+el8.4.0+20024+b87b2deb.x86_64                openldap-devel-2.4.46-16.el8.x86_64                               
  oracle-logos-httpd-84.5-1.0.1.el8.noarch                              

Complete!

Step 3 : Installing mod_ssl

[root@linuxhelp ~]# yum install mod_ssl
Last metadata expiration check: 0:05:15 ago on Saturday 11 December 2021 02:05:10 AM IST.
Dependencies resolved.
============================================================================================================================================
 Package               Architecture         Version                                                       Repository                   Size
============================================================================================================================================
Installing:
 mod_ssl               x86_64               1:2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9                 ol8_appstream               136 k

Transaction Summary
============================================================================================================================================
Install  1 Package

Total download size: 136 k
Installed size: 266 k
Is this ok [y/N]: y
Downloading Packages:
mod_ssl-2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9.x86_64.rpm                                              790 kB/s | 136 kB     00:00    
--------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                       750 kB/s | 136 kB     00:00     
Running transaction check
Transaction check succeeded.
Running transaction test

Installed:
  mod_ssl-1:2.4.37-43.0.1.module+el8.5.0+20426+404a9eb9.x86_64                                                                              

Complete!

Step 4 : Restart httpd service

 [root@linuxhelp ~]# systemctl start httpd

Step 5 : Enable httpd service

 [root@linuxhelp ~]# systemctl enable httpd
Created symlink /etc/systemd/system/multi-user.target.wants/httpd.service → /usr/lib/systemd/system/httpd.service.

Step 6 : check the status of httpd

[root@linuxhelp ~]# systemctl status httpd
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2021-12-11 02:11:57 IST; 20s ago
     Docs: man:httpd.service(8)
 Main PID: 34724 (httpd)
   Status: "Running, listening on: port 443, port 80"
    Tasks: 213 (limit: 10509)
   Memory: 25.4M
   CGroup: /system.slice/httpd.service
           ├─34724 /usr/sbin/httpd -DFOREGROUND
           ├─34731 /usr/sbin/httpd -DFOREGROUND
           ├─34732 /usr/sbin/httpd –DFOREGROUND

(check the ssl status)

Step 7 : check the ssl status

 [root@linuxhelp ~]# apachectl -M |grep ssl
AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using fe80::20c:29ff:feb9:ab7e. Set the 'ServerName' directive globally to suppress this message
 ssl_module (shared)

step 8 : generate the ssl certificates

[root@linuxhelp ~]# openssl req -newkey rsa:2048 -nodes -keyout /keys/linuxhelp.key -x509 -days 365 -out /keys/linuxhelp.crt
Generating a RSA private key
.+++++
....................................+++++
writing new private key to '/keys/linuxhelp.key'
-----
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) [XX]:in
State or Province Name (full name) []:
Locality Name (eg, city) [Default City]:
Organization Name (eg, company) [Default Company Ltd]:
Organizational Unit Name (eg, section) []:
Common Name (eg, your name or your server's hostname) []:
Email Address []:

Step 9 : To change the directory

[root@linuxhelp ~]# cd /keys/

Step 10 : To list the files

[root@linuxhelp keys]# ll
total 8
-rw-r--r-- 1 root root 1237 Dec 11 07:02 linuxhelp.crt
-rw------- 1 root root 1704 Dec 11 07:01 linuxhelp.key

Step 11 : Edit the ssl certificate path

[root@linuxhelp keys]# vim /etc/httpd/conf.d/ssl.conf 
SSLCertificateFile /keys/linuxhelp.crt
SSLCertificateKeyFile /keys/linuxhelp.key

Step 12 : create a Redirect file append following lines

[root@linuxhelp ~]# vim /etc/httpd/conf.d/redirect_http.conf
<VirtualHost _default_:80>
        Servername linuxhelp
        Redirect permanent / https://linuxhelp
</VirtualHost>

Step 13 : Restart the httpd service

[root@linuxhelp ~]# systemctl restart httpd

(check the ssl status)

With this Installation of mod_ssl and SSL certificate on Oracle Linux comes to an end.