2022-01

1.Obtaining an SSL Certificate (Let's Encrypt) Pre-assignment Enable mod_ssl # a2enmod ssl 1.1 Install the certificate # zypper -n install certbot # certbot certonly --webroot -w /srv/www/htdocs/[Web site directory] -d  [Domain name] Saving debug log to /var/log/letsencrypt/letsencrypt.log Plugins selected: Authenticator webroot, Installer None # First time only, you need to register your email address and agree to the terms o

1.SNORT Install Snort is a network-type IDS (intrusion detection system). It captures packets flowing on the network and detects suspicious packets. The source file is used directly from https://snort.org/. 1.1 advance preparation Install the required libraries # zypper install wget bison flex libfl2 gcc libpcap-devel libpcap-devel-32bit libpcap1 automake libtool make glibc-devel-32bit zlib-devel zlib-devel-32bit libWN3 libdnet-devel libdnet1 efl efl-lang elua libXvMC1 libecore1 libector1 libedje1 libeet1 libpcrecpp0 libstdc++-devel libstdc++6-devel-gcc7 pcre-devel ethtool net-tools-deprecated net-tools net-tools-lang libopenssl-1_1-devel libtirpc-devel moonjit moonjit-devel 1.2 SNORT and daq download and installation

Create a private key for the client and a public key for the server so that the client can log in using the key pair authentication. 1.Key pair creation Create a pair of public and private keys for the user who will connect to the Linux server using OpenSSH. To create a key pair, use ssh-keygen. The creation of a public/private key pair should be performed as a user with remote login privileges. If you do not specify the destination and file name, id_ecdsa and id_ecdsa.pub will be created in /home/(user name)/.ssh/.    On the way, you will also enter the password for the key.

1. Install clamav (anti-virus software) 1.1 Install Clamav # zypper -n install clamav 1.2 Virus definition file update ①Virus definition file update setting # vi /etc/freshclam.conf ■Line 71. Insert "#" at the beginning of the line "DatabaseMirror database.clamav.net".し、 "DatabaseMirror db.jp.clamav.net" added. #DatabaseMirror database.clamav.net DatabaseMirror db.jp.clamav.net

1. Install Web server Apache 1.1Install apache2 ( httpd-2.4.43 ) # zypper -n install apache2 1.2 Apache2 : Basic Configuration 2. Apache2 : Use Perl scripts. Configure Perl scripts to be used as CGI 2.1 Install Perl ①Install # zypper -n install perl 3. Apache2 : Virtual Host Configuration Configure both domains sample1.korodes.com sample2.korodes.com to be displayed on a single server 4. Apache2 : Use PHP scripts Install PHP and configure it so that PHP scripts can be used

1. vsftpd (FTP server installation) 1.1 Install vsftpd It is already installed when you install openSUSE. If it is not installed, you can install it with the following command # zypper -n install vsftpd 1.2 Edit vsftpd configuration file Save the unedited vsftpd.conf with .bak.

1.Setting up a remote connection using SSH SSH is a service to connect to a server remotely, basically running right after the OS installation, but the default settings are somewhat insecure. Configure settings to increase the security of ssh connections. 1.1 Change the configuration file of SSH service. The configuration file for the SSH service is "/etc/ssh/sshd_config".

1. Disable SELinux SELinux is a feature that provides a highly secure system architecture that prevents the concentration of privileges on root. In openSUSE, it is disabled at the time of installation. To check # vi /etc/selinux/config SELINUX=disabled 2. Use su command Not required if you set the root password at the time of installation. If you don't want to set the root password, set it as follows After logging in as a general user