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		<title>Debian12.11 : Logwatch , Chkrootkit , Disk Usage Check Script</title>
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		<title>Debian12.11 : OS installation and initial configuration</title>
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		<title>Debian12.11 : Nagios Server , Tripwire Install</title>
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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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		<title>Debian12.11 : Suricata + Elastic Stack + Kibana</title>
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					<description><![CDATA[Prerequisite. We will install Suricata IDS and ElasticStack anad Kibana on the following servers・1st server Su [&#8230;]]]></description>
		
		
		
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		<title>Debian12.11 : Let&#039;s Encrypt, WEB/Mail Server SSL</title>
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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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		<pubDate>Wed, 06 Aug 2025 00:32:26 +0000</pubDate>
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					<description><![CDATA[1. System Backup 1.1 Backup under /var/www/html ①　Create backup_all.sh script under /opt/script backup_all.sh  [&#8230;]]]></description>
		
		
		
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		<title>Debian12.11 : SSH , UFW(Firewall)Setting</title>
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		<pubDate>Sun, 20 Jul 2025 01:29:57 +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>Debian12.11 : SSH connection using public key cryptography</title>
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		<pubDate>Sun, 20 Jul 2025 01:53:37 +0000</pubDate>
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					<description><![CDATA[ Create public and private key pairs Create a public/private key pair for a user connecting to a Linux server  [&#8230;]]]></description>
		
		
		
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		<pubDate>Sun, 20 Jul 2025 01:59:10 +0000</pubDate>
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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>Debian12.11 : WEB Server(Apache) , Digest authentication</title>
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