業務用エアコン関連の技術情報、エラーコード、環境問題対策に関する別サイト「エアコンの安全な修理･適切なフロン回収」

2023-11

FreeBSD14_en

FreeBSD14 : Postfix ClamAV + Amavis + SpamassAssin

Install ClamAV on FreeBSD 14 and link it with Amavis against Postfix.ClamAV is anti-virus software.We will proceed on the assumption that you have already implemented Postfix.Before proceeding, update the Ports Collection.1. ClamAV1.1 Install# cd /usr/ports/security/clamav# make install cleanEach option is installed by default for nowclamav version check
2023.11.19
FreeBSD14_en
FreeBSD14_en

FreeBSD14 : Mail Server(Postfix,Dovecot) , SSL/TLS

1. Obtaining a certificate for the mail serverObtain a certificate for the mail server to convert the mail server to SSL/TLS.Use the certbot that was used when the web server was converted to SSL.Stop the web server and execute the following command
2023.11.18
FreeBSD14_en
FreeBSD14_en

FreeBSD14 : WEB Server(Apache2) , MySQL8

1. Apache21.1 Install# cd /usr/ports/www/apache24# make configThere are many options, but we will proceed wit1. Apache21.1 Install# cd /usr/ports/www/apache24# make configThere are many options, but we will proceed wit
2023.11.17
FreeBSD14_en
FreeBSD14_en

FreeBSD14 : FTP Server , Samba Fileserver

1. FTP Server(Vsftpd)1.1 advance preparation①Private Key Creation# cd /etc/ssl# openssl genrsa -des3 -out server.key 2048Generating RSA private key, 2048 bit long modulus (2 primes).........................................................................................................................................+++++.................................................+++++e is 65537 (0x010001)Enter pass phrase for server.key:Verifying - Enter pass phrase for server.key:Enter PEM pass phrase:Verifying - Enter PEM pass phrase:
2023.11.17
FreeBSD14_en
FreeBSD14_en

FreeBSD14 : Initial setup (Vim , SSH , firewall, NTP server)

1. Vim InstallInstall Vim, which you are familiar with as an editor, as follows# pkg install -y vimEdit the ".shrc" to make Vim available as the standard editor, and log in again to reflect the change.FreeBSD14 has sh as default shell.You can check the current SHELL with the following command
2023.11.16
FreeBSD14_en
FreeBSD14_en

FreeBSD14.0 : OS INSTALL

FreeBSDFreeBSD is UNIX-like open source OS software. In particular, its performance as a network operating system exceeds that of Linux-based systems, and it maintains stable performance even under high loads.FreeBSD is designed to be robust and sturdy with an emphasis on practicality, making it suitable for operating FTP, WWW, and e-mail servers for major companies and services.In this project, we will install FreeBSD 14.0, released on Nov 14, 2023, and build the server.FeaturesHigh-speed, high-performance multi-platform capable of withstanding high workloadsAdopted by many major companiesNetwork security measures can be applied by restricting accessCapable of operating small to large serversMore than 33,000 dedicated software applications from commercial to personal use
2023.11.15
FreeBSD14_en
fedora39_en

Fedora39 : System Backup and Restore

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
2023.11.13
fedora39_en
fedora39_en

Fedora39 : SNORT2 , Suricata , Tripwire

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.
2023.11.12
fedora39_en
fedora39_en

Fedora39 : Mysql8 , WordPress Install

Mysql8 Install＃ dnf -y install mysql-servercharset.cnf   Create a new one with the following contentsWordPress Install1. Create database for Word PressAs an example, assume database [wp_db] database user [wp_user] password [?W123456]
2023.11.11
fedora39_en
fedora39_en

Fedora39 : 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.
2023.11.11
fedora39_en
fedora39_en

Fedora39 : Clamav , 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 fileMail Server : Postfix + Clamav + Amavisd+SpamAssassin1.Real-time scanning of e-mails①Install Amavisd and Clamav Server
2023.11.11
fedora39_en
fedora39_en

Fedora39 : WEB Server(Apache2)

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
2023.11.10
fedora39_en
fedora39_en

Fedora39 : FTP Server(Vsftpd) , File Server(Samba)

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
2023.11.10
fedora39_en
fedora39_en

Fedora39 : Remote connection with SSH public key cryptography

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
2023.11.10
fedora39_en
fedora39_en

Fedora39 : SSH 、Firewalld

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.
2023.11.10
fedora39_en
Next page