fedora40_en

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. 1. Suricata Installation and Configuration ①Suricata install SNORT3 Snort is an open source network intrusion detection system that can perform 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 such as buffer overflows, stealth port scans, CGI attacks, SMB probes, OS fingerprinting attempts, semantic URL attacks, and server message block probes. detection.

1. Clamav ( anti-virus software ) 1.1 Clam AntiVirus Install # dnf -y install clamav clamd clamav-update 1.2 Edit Clam AntiVirus configuration file 2. Mail server(Postfix) 2.1 Postfix Install Install Postfix and build an SMTP server # dnf -y install postfix Check if Postfix is installed 3. Mail server(Dovecot) 3.1 Dovecot Install # dnf -y install dovecot 4.Create mail user and check operation 4.1 advance preparation ①Pretreatment for new users When a new user is added, set up the system to automatically send and receive e-mail. Mail Server : Postfix + Clamav + clamav-milter+SpamAssassin 1.Real-time scanning of e-mails ①clamav-milter Install Virus checks are performed on the mail server side using Clam AntiVirus. The mail server and Clam AntiVirus are linked using clamav-milter.

Fedora40 ; Download(Released on April 24, 2024) Fedora40 can be downloaded from the following mirror https://ftp.riken.jp/Linux/fedora/releases/40/Server/x86_64/iso/ The file to download is the "Fedora-Server-dvd-x86_64-40-1.14.iso" image Create an installation disk from the downloaded "Fedora-Server-dvd-x86_64-40-1.14.iso" image on a USB disk and install it on the actual device. Fedora40 ; Install ①Change to boot from USB disk on the BIOS change screen of the PC and boot the PC. Select "Install Fedoara 40" at the top and press Enter

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 2.1 System modernization 3.Network Settings 3.1 Set host name To set the hostname to "Lepard 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) 6.Install and configure vim editor ①Installing the vim package

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.

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

1.FTP Server Installation 1. 1 Vsftpd Install # dnf install vsftpd version check # vsftpd -v vsftpd: version 3.0.5 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

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

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.

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

Tripwire 1.Install # dnf -y install tripwire 2.Passphrase setting Logwatch ①Install # dnf install logwatch ②Edit configuration file Introduce disk usage check script 1. Script Creation # cd /var/www/system # vi disk_capacity_check.sh

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