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	<title>OracleLinux9.3_en | Linux Server Construction</title>
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	<title>OracleLinux9.3_en | Linux Server Construction</title>
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	<item>
		<title>OracleLinux9.3 : WEB Server (Apache)</title>
		<link>https://korodes.com/en/oracle9-3_en_06/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Sun, 21 Apr 2024 03:29:39 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25171</guid>

					<description><![CDATA[1.Apache2 Install

1.1 httpd Install

# dnf -y install httpd
1.3 Virtual Host Settings

Assign and configure the domain name [FQDN] to the document root [/var/www/html/[FQDN]] directory for virtual host operation
2. Confirmation of CGI Script Usage

①Confirmation of CGI availability
3. PHP installation and configuration

①Install

# dnf -y install php php-mbstring php-pear
4. Digest authentication with Apache2

Since Basic Authentication, a well-known authentication authorization method for http, sends authentication information in plain text, there is a risk of ID and password leakage if the packet is intercepted.
On the other hand, Digest Authentication encrypts and transmits authentication information, so there is almost no risk of information leakage.]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : OS Install</title>
		<link>https://korodes.com/en/oracle9-3_en_01/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Fri, 19 Apr 2024 00:01:28 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25132</guid>

					<description><![CDATA[OracleLinux9.3

Oracle Linux provides a 100% application binary compatible alternative to Red Hat Enterprise Linux and  CentOS Linux for both hybrid and multi-cloud environments.
Since 2006, Oracle Linux has been completely free to download and use. Source code, binaries and updates are provided free of charge. It is freely redistributable. Free for use in production environments.

This time, we will proceed with the latest Oracle Linux 9.3.(November 15, 2023 Release)

１．Oracle Linux9.3 Download

Oracle Linux 9.3 installation image (OracleLinux-R9-U3-x86_64-dvd.iso ) can be downloaded from the following site
https://www.oracle.com/linux/]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : Initial settings after OS installation</title>
		<link>https://korodes.com/en/oracle9-3_en_02/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Sat, 20 Apr 2024 02:42:07 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25142</guid>

					<description><![CDATA[1. Install bash completion extension package

# dnf -y install bash-completion
# reboot

2. Disabling SELinux

First, disable selinux.　selinux is a feature that improves auditing and security in Linux, but when enabled, it can limit the behavior of services and the contents of the configuration considerably.
Therefore, it is basically a case of invalidation in many cases.
SELinux operating modes
Enforcing : SELinux functionality is enabled and access control is enabled
Permissive : SElinux will warn, but no access restrictions will be placed
disabled : Both SElinux function and access control are]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : SSH Remote connection , Firewalld , NTP Server</title>
		<link>https://korodes.com/en/oracle9-3_en_03/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Sat, 20 Apr 2024 03:53:09 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25147</guid>

					<description><![CDATA[1. Setting up a remote connection via SSH

SSH is a service for connecting remotely to a server and is basically running immediately after the OS is installed, but the default settings are somewhat insecure.
Here we will configure the default settings to increase the security of SSH connections.

1.1 SSH service configuration file changes

The SSH service configuration file is "/etc/ssh/sshd_config".
2. Firewall (Firewalld) settings

In Oracle, the firewall is firewalld configured by default and enabled during OS installation.

To briefly explain "firewalld," when setting communication control policies, communication permission/blocking rules are applied to predefined zones, and these zones are then assigned to each NIC (network adapter).
3. Remote connection from Windows

Configuration in Windows
Start the setup for remote connection from Windows, using "Tera Term" as the terminal emulator.
Start Tera Term, cancel the startup screen, and then select "New Connection" from "File" in the Tera Term menu.]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : SSH connection with SSH key pair</title>
		<link>https://korodes.com/en/oracle9-3_en_04/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Sat, 20 Apr 2024 04:06:40 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25156</guid>

					<description><![CDATA[SSH connection with authentication using public key 
Creation of public and private key pairs

Create a public/private key pair for a user connecting to the Linux server using OpenSSH.
Use ssh-keygen to create key pairs.
Creation of public/private key pairs is performed with remote login user privileges.
If you do not specify the destination and file name, id_ed25519 and id_ed25519.pub will be created in /home/(user name)/.ssh/. On the way, enter the password for the key.]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : FTP Server , Samba FileServer Install</title>
		<link>https://korodes.com/en/oracle9-3_en_05/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Sat, 20 Apr 2024 07:54:07 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25164</guid>

					<description><![CDATA[1. FTP Server

1.1 Vsftpd Install

# dnf -y install vsftpd

1.2 Vsftpd configuration

Save vsftpd.conf with .bak

# cp /etc/vsftpd/vsftpd.conf /home/huong/vsftpd.conf.bak
2. vsftpd SSL/TLS

Configure Vsftpd to use SSL/TLS

2.1 Create self-signed certificates

This work is not required if you are using a trusted, legitimate certificate such as Let's Encrypt.
3. File server installation with Samba

Build a file server with access rights that requires user authentication with Samba.
Installation Procedure
①Create shared folders with access rights that require user authentication
②Accessible group creation
③Creation of users belonging to accessible groups
④Configuration File Edit]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : Clamav(anti-virus) , Mail Server</title>
		<link>https://korodes.com/en/oracle9-3_en_07/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Sun, 21 Apr 2024 03:54:10 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25179</guid>

					<description><![CDATA[clamav(anti-virus)

1.Clam AntiVirus Install

# dnf -y install clamav clamd clamav-update

2.Edit Clam AntiVirus configuration file
Mail Server Installation

1. Postfix

1.1 Install
Install Postfix and build an SMTP server

# dnf -y install postfix
Mail Server : Postfix + Clamav + clamav-milter+SpamAssassin

1.Real-time scanning of e-mails

①clamav-milter Install
Virus checks are performed on the mail server side using Clam AntiVirus.
The mail server and Clam AntiVirus are linked using clamav-milter.]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : SSL Certificate Acquisition( Let&#039;s Encrypt ) , WEB/Mail server SSL</title>
		<link>https://korodes.com/en/oracle9-3_en_08/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Sun, 21 Apr 2024 12:41:52 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25190</guid>

					<description><![CDATA[1. SSL Certificate Acquisition ( Let's Encrypt )

Install the latest open ssl

# dnf install openssl-devel

1.1 advance preparation

1.Package management system Snappy installation
Since the SSL certificate issuing tool "certbot" of Let's Encrypt is recommended to be installed using "snap" after 2021, install Snapd first.(Can also be installed the traditional way with dnf or yum)
2. Converting Apache to https

Install the following

# dnf -y install mod_ssl

2.1 Edit ssl.conf file
3. SSL/TLS (Let's Encrypt) settings on the mail server

3.1 Obtaining a certificate for the mail server

Obtain a certificate for the mail server, but it cannot be obtained in the same way as above, so the following with the "--standalone" option fails.]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : MySQL8 , WordPress Install</title>
		<link>https://korodes.com/en/oracle9-3_en_09/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Mon, 22 Apr 2024 03:53:48 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25196</guid>

					<description><![CDATA[Mysql8 Install
＃ dnf -y install mysql-server

Create a new charset.cnf with the following contents
WordPress Install
1. Create database for Word Press

As an example, assume database [wp_db] database user [wp_user] password [?W123456]]]></description>
		
		
		
			</item>
		<item>
		<title>OracleLinux9.3 : Suricata , SNORT3 Install</title>
		<link>https://korodes.com/en/oracle9-3_en_10/</link>
		
		<dc:creator><![CDATA[nuy]]></dc:creator>
		<pubDate>Mon, 22 Apr 2024 04:11:41 +0000</pubDate>
				<category><![CDATA[OracleLinux9.3_en]]></category>
		<guid isPermaLink="false">https://korodes.com/?p=25206</guid>

					<description><![CDATA[Suricata

SURICATA IDS/IPS is an open source IDS that monitors communications on the network and detects suspicious traffic.
The basic mechanism is signature-based, so it can detect predefined unauthorized communications. Suricata is also characterized by its ability to provide protection as well as detection.
SNORT3

 Snort is an open source network intrusion detection system that can perform real-time traffic analysis and packet logging on IP networks.

It can perform "protocol analysis," "content search," and "matching" and can be used to detect a variety of attacks such as buffer overflows, stealth port scans, CGI attacks, SMB probes, OS fingerprinting attempts, semantic URL attacks, and server message block probes. detection.]]></description>
		
		
		
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