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Fedora36 ; Logwatch , DiCE Install

Logwatch Introduction ①Install # dnf install logwatch ②Edit configuration file Installing DiCE Whenever the global IP changes, which happens when the network is disconnected or the router is disconnected and rebooted, the dynamic DNS must be accessed to inform the user that the global IP has changed. DiCE does this automatically! ①Download and install Dice
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Fedora36 ; OS Install

What is Fedora? Fedora is an open source operating system software, a Linux distribution. The project started as a successor to Red Hat Linux, whose development was terminated at the end of 2003. It is unique in that it is community-driven, proactively incorporates feedback from the field, and introduces advanced, flexible, and advanced features. The most obvious difference when compared to popular Linux distributions such as "Ubuntu" is the balance between "advanced" and "stable". However, its stability has now been greatly improved, and it is gaining a reputation as an OS that can be used regularly, not just for functional testing purposes. For those who want to incorporate new and useful features as soon as possible, Fedora will be the best choice. However, it should not be used as a production environment or corporate need. In this case, we will use the latest Fedora 36 Server, released May 10, 2022.
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Fedora36 ; Various settings after installation

1. SELinux Disable 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 configuration considerably. Therefore, it is basically invalidated in many cases. You can disable it by doing the following 2. System modernization & Services suspended due to security measures 3.Network Settings 3.1 Set host name Set the hostname to "Lepard" since the hostname was not set during OS installation. 4.Install NTP server and set up time synchronization service 4.1 Chrony Install 5.Set server time zone Set time zone to Japan (Tokyo)
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Fedora36 ; System Backup and Restore

Web configuration file (under html) backup ①Create backup script file # cd /var/www/system/ # vi html_backup.sh Contents of html_backup.sh MySQL database backup ①Create backup script file Web configuration file (under html) restored ① Copy the HTML backup file to the "/ (root)" directory of the server to be used for restoration Restore MySQL data ① Save database backup file to any directory
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Fedora36 ; SSL Certificate ( Let's Encrypt ) , Apache ・Mail Server SSL

1.Obtain SSL Certificate ( Let's Encrypt ) Install the latest open ssl # dnf install openssl-devel 2. Apache SSL Install the following just in case # dnf -y install mod_ssl 3.Mail SSL/TLS(Let's Encrypt) 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.
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Fedora36 ; Mysql8 , WordPress Install

Mysql8 installation #dnf module -y install mysql:8.0 #vi /etc/my.cnf.d/charset.cnf Create a new charset.cnf with the following contents # Set default character encoding # To handle 4-byte characters such as pictographs, use [utf8mb4]. [mysqld] character-set-server = utf8mb4 [client] default-character-set = utf8mb4 WordPress Installation 1. Create a database for WordPress As an example, assume database [wp_db] database user [wp_user] password [?W123456]
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Fedora36 ; SNORT2 , Tripwire Install

SNORT Installation 1.advance preparation ①Add the CodeReady Red Hat repository and install the required software # dnf -y install bison flex libpcap-devel pcre-devel openssl-devel libdnet-devel libtirpc-devel libtool nghttp2 libnghttp2-devel # mkdir /var/src ②Installing DAQ # cd /var/src Tripwire Installation 1.Install # dnf -y install tripwire
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Fedora36 ; Clam AntiVirus , Mail Server

Install Clamav ( anti-virus software ) 1.Install Clam AntiVirus # dnf -y install clamav clamd clamav-update 2.Edit Clam AntiVirus configuration file # vi /etc/clamd.d/scan.conf Mail Server Install 1. Install Postfix 1.1 Install Install Postfix and build an SMTP server Mail Server : Postfix + Clamav + Amavisd+SpamAssassin 1.Real-time scanning of E-mails ①Install Amavisd and Clamav Server # dnf -y install amavisd-new clamd perl-Digest-SHA1 perl-IO-stringy
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Fedora36 : WEB Server(Apache2) Install

Apache2 installation and virtual host configuration 1.Apache2 Install ①httpd install # dnf -y install httpd Version Check # httpd -v erver version: Apache/2.4.54 (Fedora Linux) Server built: Jun 17 2022 00:00:00 3.Virtual Host Settings Assign and configure the [FQDN] to be operated on the virtual host in the document root [/var/www/html/FQDN] directory Confirmation of CGI Script Usage ①CGI availability check PHP installation and configuration 1.PHP Installation ①Install # dnf -y install php php-mbstring php-pear
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Fedora36 : FTP Server(Vsftpd) , File Server(Samba)

1.FTP Server Installation 1. 1 Vsftpd Install # dnf -y install vsftpd 1.2 Vsftpd configuration Save the unedited vsftpd.conf with .bak 2. vsftpd SSL/TLS Configure Vsftpd to use SSL/TLS 2.1 Create self-signed certificates 3. File server installation with Samba Build a file server with access rights that requires user authentication with Samba. Installation Procedure ① Create shared folders with access rights that require user authentication ②Creation of accessible groups ③Creation of users belonging to groups that can be accessed ④Configuration File Editing
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Fedora36 ; Remote connection with SSH public key cryptography

SSH public key cipher setting Create an SSH private key on Windows and an SSH public key on the server to allow login by key pair authentication. 1.Create key pair with ECDSA Become an ordinary user and create a key pair in ECDSA # su – $ ssh-keygen -t ecdsa Generating public/private ecdsa key pair. Enter file in which to save the key (/home/huong/.ssh/id_ecdsa): Created directory '/home/huong/.ssh'. Enter passphrase (empty for no passphrase):  ← Enter any password
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Fedora36 ; SSH 、Firewalld

1.Remote connection by SSH SSH is a service for connecting remotely to a server, basically running immediately after OS installation, but the default settings are somewhat insecure. 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". Open the configuration file in a vi editor. # vi /etc/ssh/sshd_config