2023-04

1.Website data backupBackup under /var/www/html①Create backup script file2.MySQL database backup①Create backup script file3.Web configuration file (under html) restored① Copy the HTML backup file to the "/ (root)" directory of the server to be used for restoration4.Restore MySQL data①Save database backup file to any directory

Fedora38 ; Logwatch , Disk Usage Check Script

Clamav ( anti-virus software )1.Clam AntiVirus InstallMail Server Installation1. Postfix 1.1 InstallInstall Postfix and build an SMTP serverMail Server : Postfix + Clamav + Amavisd+SpamAssassin1.Real-time scanning of e-mails①Amavisd ,Clamav Server Install

Apache2 installation and virtual host configuration1.Apache2 InstallDigest authentication in Apache2Since 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 Install3.Virtual Host SettingsAssign and configure the [FQDN] to be operated on the virtual host in the document root [/var/www/html/FQDN] directoryPHP installation and configuration1.PHP Install

1.FTP Server Installation1. 1 vsftpd Install2. vsftpd SSL/TLSConfigure Vsftpd to use SSL/TLS2.1 Create self-signed certificatesThis work is not required if you are using a trusted, legitimate certificate such as Let's Encrypt.3. File server installation with SambaBuild a file server with access rights that requires user authentication with Samba.Installation Procedure① Create shared folders with access rights that require user authentication②Creation of accessible groups③Creation of users belonging to groups that can be accessed④Configuration File Editing

1.Creation of public and private key pairsCreate 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.

1.Remote connection by SSHSSH 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 changesThe SSH service configuration file is "/etc/ssh/sshd_config".Open the configuration file in a vi editor.

1. SELinux DisableFirst, 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。

Fedora ; DownloadFedora38 can be downloaded from the following mirror siteshttp://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" imageCreate 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.

1.Obtain an SSL certificate ( Let's Encrypt )Install the latest open ssl3. SSL/TLS (Let's Encrypt) settings on the mail server3.1 Obtaining a certificate for the mail serverObtain 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 httpsInstall the following just in case

MySQL8 Install①Install➁MySQL Server start➂Check mysql versio...

SNORTSnort 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.SuricataSURICATA 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.