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		<title>Debian12.13 : OS installation and initial configuration</title>
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		<pubDate>Thu, 22 Jan 2026 03:12:26 +0000</pubDate>
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		<title>Debian12.13 : SSH , UFW(Firewall)Setting</title>
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		<pubDate>Fri, 23 Jan 2026 00:46:26 +0000</pubDate>
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					<description><![CDATA[1. SSH Service Security Settings The SSH service allows the root user to log in by default, and since the root [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : SSH connection using public key cryptography</title>
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		<pubDate>Fri, 23 Jan 2026 01:03:49 +0000</pubDate>
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					<description><![CDATA[&#160;Create public and private key pairs Create a public/private key pair for a user connecting to a Linux se [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : FTP Server , NTP Server</title>
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					<description><![CDATA[1. Install NTP server Setting Reflection Operation check 2. Install FTP Server 2.1 Install Vsftpd FTP Port21 a [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : WEB Server(Apache)</title>
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		<pubDate>Fri, 23 Jan 2026 02:22:55 +0000</pubDate>
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					<description><![CDATA[Web server Apache2 installation Allow http:80 port in UFW before installation 1 Apache2 Installation and Confi [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : Anti-virus(Clamav) , Mail Server</title>
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		<pubDate>Fri, 23 Jan 2026 04:20:50 +0000</pubDate>
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					<description><![CDATA[1. Antivirus software Clamav installed Install Clam AntiVirus, a free anti-virus software for Linux, as an ant [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : Let&#039;s Encrypt, WEB/Mail Server SSL</title>
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		<pubDate>Sat, 24 Jan 2026 01:03:48 +0000</pubDate>
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					<description><![CDATA[1. Obtain a certificate (Let's Encrypt) 1.1 advance preparation 1.Enable mod_ssl If you get bash: a2enmod: com [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : MariaDB , WordPress Install</title>
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		<pubDate>Sat, 24 Jan 2026 01:54:37 +0000</pubDate>
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					<description><![CDATA[1. MariaDB 1.1 Install MariaDB version confirmation 1.2 MariaDB Server Security Settings MariaDB comes with a  [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : Suricata + Elastic Stack + Kibana</title>
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		<pubDate>Sat, 24 Jan 2026 02:18:34 +0000</pubDate>
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					<description><![CDATA[Prerequisite We will install Suricata IDS and ElasticStack anad Kibana on the following servers・1st server　Sur [&#8230;]]]></description>
		
		
		
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		<title>Debian12.13 : Nagios Server , Tripwire Install</title>
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		<pubDate>Wed, 28 Jan 2026 01:36:49 +0000</pubDate>
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					<description><![CDATA[Nagios Server installed Nagios is an open source monitoring solution running on Linux.Nagios is designed to pe [&#8230;]]]></description>
		
		
		
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