MiracleLinux9.2_en

1.Disabling SELinux First, disable selinux. selinux is a feature that improves auditing and security in Linux, but when enabled, it places considerable restrictions on the behavior of services and on what can be configured. Therefore, it is basically disabled in many cases. SELinux Operation Mode 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 disabled

1.Obtain an SSL certificate ( Let's Encrypt ) Install the latest open ssl # dnf install openssl-devel 1.1 advance preparation 1.Package management system Snappy installed 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 just in case # dnf -y install mod_ssl 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.

Clamav (anti-virus software)Install 1.Clamav install # dnf -y install clamav clamd clamav-update 2.Clam AntiVirus  Configuration File Edit Mail Server Install 1. Postfix 1.1 Install Install Postfix and build an SMTP server 2.Dovecot 2.1 dovecot install # dnf -y install dovecot 2.2 Edit dovecot.conf file Mail Server : Postfix + Clamav + Amavisd+SpamAssassin 1.Real-time scanning of e-mails ①Install Amavisd and Clamav Server

chkrootkit ①Download and install chkrootkit # cd /usr/local/src # wget ftp://ftp.chkrootkit.org/pub/seg/pac/chkrootkit.tar.gz # tar xvf chkrootkit.tar.gz ➁Create /root/bin directory and move chkrootkit command to that directory # mkdir -p /root/bin # mv chkrootkit-0.58b/chkrootkit /root/bin ➂Check chkrootkit. Logwatch ①Install # dnf install logwatch ②Edit configuration file

1.Apache2 Install , Virtual Host Configuration 1.1 Apache2 install ①httpd install # dnf -y install httpd 1.3 Virtual Host Settings Assign and configure the domain name [miracle.korodes.com] to the document root [/var/www/html/miracle.korodes.com] directory for virtual host operation 2. Use of CGI Scripts ①CGI availability check 3. PHP installation and configuration 1.PHP8 Install 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 informa

MiracleLinux MIRACLE LINUX is a Japanese Linux distribution provided by Cybertrust Corporation. It has been based on RHEL since Version 2.0 released in May 2001, and has been a complete RHEL clone since Version 6.0 released in January 2012. The latest version is 9.2, released on October 05, 2023, but can be installed just like 9.0. MIRACLE LINUX, a well-known domestic RHEL clone, was initially a commercial OS with a paid license, but following the demise of CnetOS8, it was announced that it would be offered free of charge starting with the latest 8.4. Therefore, MIRACLE LINUX is currently in the limelight as a candidate for migration from CentOS8 and CentOS Stream9.

1.Setting up SSH remote connection SSH is a service to connect to a server remotely, and is basically running right after the OS installation, but the default settings are somewhat insecure. In this section, we will configure the settings to change the default settings and increase the security of the ssh connection. 1.1 Change the configuration file of SSH service. The configuration file for the SSH service is "/etc/ssh/sshd_config". Open the configuration file with vi editor

SSH connection with authentication using public key cryptography 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_eed25519.pub will be created in /home/(user name)/.ssh/. On the way, enter the password for the key.

1.FTP Server 1. 1 Vsftpd Install # dnf -y install vsftpd 1.2 Configure Vsftpd Save the unedited vsftpd.conf with .bak 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 Editing

Mysql8 Install ＃ dnf -y install mysql-server charset.cnf   Create a new one 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]

Snort3 Install Snort is an open source network intrusion detection system capable of performing 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, including "buffer overflows," "stealth port scans," "CGI attacks," "SMB probes," "OS fingerprinting attempts," "semantic URL attacks," and "server message block probes. MiracleLinux8 does not have a Snort3 repository, so build, compile and install Snort3 from source code 1. Advance preparation ①Install required build tools and libraries

1.Website data backup 1-1.Backup under /var/www/html ①Create backup script file # cd /var/www/system # vi backup_html.sh 2.MySQL database backup ①Create backup script file # cd /var/www/system # vi db_my_backup.sh 3.Restore backup files under html ①Store HTML backup files in "/ (root)" directory 4.Restore Mysql backup file ①Save the database backup file to any directory and （In the example, the directory is "/var/www/backup/db_bak".）Extracting data