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1.Obtain an SSL certificate ( Let's Encrypt ) Install the latest open 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 since it cannot be obtained in the same way as above, stop the web server once and add the "--standalone" option. 2. Converting Apache to https Install the following just in case

MySQL8 Install ①Install ➁MySQL Server start ➂Check mysql ver...

SNORT Snort 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. 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.Website data backup Backup under /var/www/html ①Create bac...

Clamav 1.Clam AntiVirus Install 2.Edit Clam AntiVirus config...

1.FTP Server Installation 1. 1 vsftpd Install 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

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. 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。

Fedora ; Download Fedora37 can be downloaded from the following mirror sites http://ftp.riken.jp/Linux/fedora/releases/37/Server/x86_64/iso/ The file to download is the "Fedora-Server-netinst-x86_64-37-1.7.iso" image Create an installation disk from the downloaded "Fedora-Server-netinst-x86_64-37-1.7.iso" image on a USB disk and install it on the actual device.

What is Fedora? Fedora is an open source operating system software, a Linux distribution. The project started as a successor to Red Hat Linux, whose development was terminated at the end of 2003. It is unique in that it is community-driven, proactively incorporates feedback from the field, and introduces advanced, flexible, and advanced features. The most obvious difference when compared to popular Linux distributions such as "Ubuntu" is the balance between "advanced" and "stable". However, its stability has now been greatly improved, and it is gaining a reputation as an OS that can be used regularly, not just for functional testing purposes. For those who want to incorporate new and useful features as soon as possible, Fedora will be the best choice. However, it should not be used as a production environment or corporate need. In this case, we will use the latest Fedora 35 Server, released November 02, 2021

1.Remote connection by SSH SSH is a service for connecting r...

1.Obtain an SSL certificate ( Let's Encrypt ) Install the la...

Mysql8 Install ①Install ➁MySQL Server start ➂Check mysql ver...

SNORT Snort is an open source network intrusion detection sy...

Chkrootkit ①Download , Install ➁Create /root/bin directory a...