2023-06

1.Debian12 Overview In this article, we will explain how to build a server with Debian, the basis of the user-friendly Linux distribution UBUNTU. The latest is Debian 12.0 (codenamed "bookworm"), released on June 10, 2023 2.Download Debian installation image Debian12 download site  https://www.debian.org/ Access the above official website and download "debian-12.0.0-amd64-netinst.iso." which is convenient for setup in an environment connected to the Internet.（Fits on a single CD） NETINST allows you to download and install the necessary packages from the Internet, so you can use a smaller installer than a full installer. Click through the following screens in order.

1. System Backup 1.1 Backup under /var/www/html ①　Create backup_all.sh script under /opt/script 1.2 MariaDB database backup ①Create db_backup.sh script under /opt/script # vi /opt/script/db_backup.sh db_backup.sh script contents 2. System Restore 2.1 Restore backup files under HTML ① Store HTML backup files used for backup in the "/ (root)" directory Select the backup file with the latest timestamp (e.g. www_back_20220501.tar.gz) 2.2 Restore MariaDB database ①Save DB backup file to any directory and extract data # cd /var/www/backup/db_bak

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. Logwatch,Chkrootkit,Disk Usage Check Script install

1. MariaDB 1.1 Install 1.4. MariaDB Server Security Settings MariaDB comes with a default security script, mariadb-secure-installation, which can be used to improve the security of your MariaDB installation, including Set a password for the root account (if necessary). Disable remote root login to the database. Delete anonymous user accounts. Delete the test database to which anonymous users have access by default. 2.WordPress 2.1 Database Creation Create a database for Word Press (for example, in this case, the database name is "wp_db", the user name is "wp_user", and the password is "?Y123456y")

Web server Apache2 installation Allow http:80 and https:443 ports in UFW before installation 3.  Apache2; Using Perl Scripts Enable CGI to make Perl scripts available ①Install Perl 4 Apache2 : Using PHP Scripts ①Install PHP 5. Virtual Host Settings Copy the default configuration file (file name is arbitrary, in this case vhost-yourdomain.conf as an example) and configure the virtual host 6. Digest authentication with Apache2 Since 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.

1. Obtain a certificate (Let's Encrypt) 1.1 advance preparation ①Enable mod_ssl # a2enmod ssl 2. SSL/TLS (Let's Encrypt) configuration for Apache2 ①Edit Apache2 SSL-related configuration files 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.

1.Antivirus software Clamav installed Install Clam AntiVirus, a free anti-virus software for Linux, as an anti-virus measure. By installing this anti-virus software, you can not only scan the entire server for viruses, but also scan incoming and outgoing mail for viruses if you build and configure a mail server. 2. Mail server installation Postfix was developed as a Mail Transport Agent (MTA) to replace sendmail, and is a mail server that is highly compatible with sendmail, secure, easy to maintain, and fast. In addition, since Postfix only functions as an SMTP server for sending mail, the POP server Dovecot for receiving mail will be installed separately in the latter half. 3 Applied ClamAV to mail server Postfix Set up Postfix and Clamav to work together to scan incoming and outgoing mail in real time. 4 Apply spam checks to the mail server 4.1 Spam checking using spamassassin and procmail ①spamassassin and procmail installation