Click here for "Safe Air Conditioner Repair and Proper Freon Recovery".

fedora38_en

fedora38_en

Fedora38 ; System Backup and Restore

1.Website data backup Backup under /var/www/html ①Create backup script file 2.MySQL database backup ①Create backup script file 3.Web configuration file (under html) restored ① Copy the HTML backup file to the "/ (root)" directory of the server to be used for restoration 4.Restore MySQL data ①Save database backup file to any directory
fedora38_en

Fedora38 ; Logwatch , Disk Usage Check Script

Fedora38 ; Logwatch , Disk Usage Check Script
fedora38_en

Fedora38 ; Clamav , Mail Server

Clamav ( anti-virus software ) 1.Clam AntiVirus Install Mail Server Installation 1. Postfix 1.1 Install Install Postfix and build an SMTP server Mail Server : Postfix + Clamav + Amavisd+SpamAssassin 1.Real-time scanning of e-mails ①Amavisd ,Clamav Server Install
fedora38_en

Fedora38 ; WEB Server(Apache2)

Apache2 installation and virtual host configuration 1.Apache2 Install Digest authentication in Apache2 Since Basic Authentication, a well-known authentication authentication method for http, transmits 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 the authentication information and sends it in encrypted form, so there is almost no risk of information leakage. ①httpd Install 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 PHP installation and configuration 1.PHP Install
fedora38_en

Fedora38 ; FTP Server(Vsftpd) , File Server(Samba)

1.FTP Server Installation 1. 1 vsftpd Install 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 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
fedora38_en

Fedora38 ; Remote connection with SSH public key cryptography

1.Creation of public and private key pairs Create a public/private key pair for a user connecting to a Linux server using OpenSSH. Use ssh-keygen to create the key pair. The creation of a public/private key pair is performed with the authority of the user logging in remotely. If you do not specify the creation destination and file name, id_ed25519 and id_ed25519.pub will be created in /home/(user name)/.ssh/. On the way, also enter the password for the key.
fedora38_en

Fedora38 ; 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.
fedora38_en

Fedora38 ; 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。
fedora38_en

Fedora38 ; OS Install

Fedora ; Download Fedora38 can be downloaded from the following mirror sites http://ftp.riken.jp/Linux/fedora/releases/38/Server/x86_64/iso/ The file to download is the "Fedora-Server-netinst-x86_64-38-1.6.iso" image Create an installation disk from the downloaded "Fedora-Server-netinst-x86_64-38-1.6.iso" image on a USB disk and install it on the actual device.
fedora38_en

Fedora38 ; SSL Certificate Acquisition( Let's Encrypt ) , Apache / Mail SSL/TLS

1.Obtain an SSL certificate ( Let's Encrypt ) Install the latest open 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 since it cannot be obtained in the same way as above, stop the web server once and add the "--standalone" option. 2. Converting Apache to https Install the following just in case
fedora38_en

Fedora38 ; Mysql8 , WordPress Install

MySQL8 Install ①Install ➁MySQL Server start ➂Check mysql ver...
fedora38_en

Fedora38 ; SNORT2 , Suricata , Tripwire

SNORT 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. 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.