nuy | Page 28 | Linux Server Construction

MiracleLinux9.0 : Clamav( anti-virus ) , Mail Server

Clamav (anti-virus software)Install1.Clamav install# dnf -y install clamav clamd clamav-update2.Clam AntiVirus Configuration File EditMail Server Install1. Postfix1.1 InstallInstall Postfix and build an SMTP server2.Dovecot2.1 dovecot install# dnf -y install dovecot2.2 Edit dovecot.conf file

2022.11.15

MiracleLinux9.0_en

MiracleLinux9.0 : SSH , Firewalld , NTP Server

1.Setting up SSH remote connectionSSH 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

2022.11.15

MiracleLinux9.0_en

Rocky Linux9.2 ; SSL Certificate Acquisition( Let's Encrypt ) , Apache SSL , Mail SSL/TLS

1.Obtain an SSL certificate ( Let's Encrypt )Install the latest open ssl# dnf install openssl-devel1.1 advance preparation1.Package management system Snappy installedSince 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 httpsInstall the following just in case# dnf -y install mod_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 it cannot be obtained in the same way as above, so the following with the "--standalone" option fails.

2023.05.26

Rocky Linux9.2_en

OracleLinux9.1 : WEB Server (Apache)

1.Apache2 installation and virtual host configuration1.1 Apache2①httpd install# dnf -y install httpd1.3 Virtual Host SettingsAssign and configure the domain name [oracle.korodes.com] to the document root [/var/www/html/oracle.korodes.com] directory for virtual host operation# vi /etc/httpd/conf.d/vhost.conf2. Confirmation of CGI Script Usage①Confirmation of CGI availability3. PHP installation and configuration1.PHP install①Install

2022.12.29

OracleLinux9.1-en

AlmaLinux9.2 ; WEB Server(Apache2) & Virtual Hosts

1.Apache2 Install , Virtual Host Configuration1.1 Apache2 install2. Use of CGI Scripts①CGI availability check3. PHP installation and configuration4. Digest authentication with Apache2Since 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.

2023.05.18

Almalinux9.2_en

MiracleLinux8.8 ; FTP Server , Samba FileServer Install

2. Vsftpd over SSL/TLSLS2.1 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 Procedure①Create shared folders with access rights that require user authentication②Accessible group creation③Creation of users belonging to accessible groups④Configuration File Editing

2023.10.13

MiracleLinux8.8_en

MiracleLinux8.8 ; SSH public key cryptography setting

SSH public key cipher setting1.Create a key pairCreate 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 must be done as a user with remote login 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.

2023.10.13

MiracleLinux8.8_en

MiracleLinux8.8 ; SSH , Firewalld , NTP Server

1.Setting up a remote connection via SSHSSH 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 changesModify the configuration file to change the SSH service settings.The SSH service configuration file is "/etc/ssh/sshd_config".

2023.10.12

MiracleLinux8.8_en

MiracleLinux8.8 ; SSL Certificate Acquisition( Let's Encrypt ) , Apache SSL , Mail SSL/TLS

1.SSL Certificate Acquisition ( Let's Encrypt )Install the latest open ssl# dnf install openssl-devel1.1 advance preparation1.Package management system Snappy installationSince 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 httpsInstall the following# dnf -y install mod_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 it cannot be obtained in the same way as above, so the following with the "--standalone" option fails.

2023.10.14

MiracleLinux8.8_en

MiracleLinux8.8 ; MySQL8 , WordPress Install

Mysql8 Install＃ dnf -y install mysql-serverCreate a new charset.cnf with the following contentsWordPress Install1. Create database for Word PressAs an example, assume database [wp_db] database user [wp_user] password [?W123456]

2023.10.15

MiracleLinux8.8_en

AlmaLinux9.2 ; System Backup and Restore

1.Website data backup1-1.Backup under /var/www/html①Create backup script file# cd /var/www/system# vi backup_html.sh2.MySQL database backup①Create backup script file# cd /var/www/system# vi db_my_backup.sh3.Restore backup files under html①Store HTML backup files in "/ (root)" directory4.Restore Mysql backup file①Save the database backup file to any directory and（In the example, the directory is "/var/www/backup/db_bak".）Extracting data

2023.05.22

Almalinux9.2_en

OracleLinux8.8 ; SNORT3 , Tripwire , Chkrootkit

SNORT3 InstallSnort 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.

2023.08.19

OracleLinux 8.8_en

AlmaLinux9.2 ; FTP Server , Samba FileServer Install

2. Vsftpd over SSL/TLSLS2.1 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 Procedure①Create shared folders with access rights that require user authentication②Accessible group creation③Creation of users belonging to accessible groups④Configuration File Editing

2023.05.18

Almalinux9.2_en

AlmaLinux9.2 ; SSH、Firewalld、NTP Server

1.SSH remote connectionSSH 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

2023.05.17

Almalinux9.2_en

OpenSUSE15.3 ; Tripwire Chkrootkit Logwatch DiCE

1. Tripwire InstallTripwire is a host-based intrusion detection system (IDS) that monitors files and directories and notifies the user of any changes.1.1 Installation and configuration① Download and install2. Chkrootkit Install①Download and install chkrootkit3. Logwatch Install① Install# zypper -n install logwatch② Edit the configuration file4. DiCE InstallEvery time the global IP is changed, which happens when the Internet is disconnected or the router is disconnected and rebooted, the dynamic DNS must be accessed to notify the change in global IP.DiCE does that work for you automatically.

2022.01.18

openSUSE_15.3_en