{"id":314,"date":"2026-03-10T14:00:02","date_gmt":"2026-03-10T14:00:02","guid":{"rendered":"https:\/\/www.vm6.co.uk\/blog\/?p=314"},"modified":"2026-03-10T14:00:08","modified_gmt":"2026-03-10T14:00:08","slug":"how-to-secure-a-linux-vps-complete-step-by-step-guide","status":"publish","type":"post","link":"https:\/\/www.vm6.co.uk\/blog\/2026\/03\/10\/how-to-secure-a-linux-vps-complete-step-by-step-guide\/","title":{"rendered":"How to Secure a Linux VPS (Complete Step-by-Step Guide)"},"content":{"rendered":"\n<div style=\"font-family: Arial, sans-serif; line-height: 1.7;\">\n\n<p>If you\u2019ve just purchased a Linux VPS, securing it should be your first priority. A default VPS setup is vulnerable to brute-force attacks, bots, and automated scans within minutes of going online.<\/p>\n\n<p>This complete guide will show you how to properly secure your Linux VPS step-by-step \u2014 even if you&#8217;re a beginner.<\/p>\n\n<hr>\n\n<h2>Why Securing Your VPS Is Critical<\/h2>\n\n<ul>\n<li>Prevent brute-force SSH attacks<\/li>\n<li>Block malicious bots<\/li>\n<li>Protect your website and data<\/li>\n<li>Avoid server hijacking<\/li>\n<li>Improve overall performance and stability<\/li>\n<\/ul>\n\n<p>Let\u2019s secure your server properly.<\/p>\n\n<hr>\n\n<h2>Step 1: Update Your Server Immediately<\/h2>\n\n<pre>\napt update && apt upgrade -y\n<\/pre>\n\n<p>Keeping your system updated patches security vulnerabilities.<\/p>\n\n<hr>\n\n<h2>Step 2: Create a New Sudo User<\/h2>\n\n<p>Never use root for daily operations.<\/p>\n\n<pre>\nadduser yourusername\nusermod -aG sudo yourusername\n<\/pre>\n\n<p>Login using your new user:<\/p>\n\n<pre>\nssh yourusername@your-server-ip\n<\/pre>\n\n<hr>\n\n<h2>Step 3: Disable Root Login<\/h2>\n\n<p>Edit SSH config:<\/p>\n\n<pre>nano \/etc\/ssh\/sshd_config<\/pre>\n\n<p>Find and change:<\/p>\n\n<pre>\nPermitRootLogin no\n<\/pre>\n\n<p>Restart SSH:<\/p>\n\n<pre>systemctl restart ssh<\/pre>\n\n<hr>\n\n<h2>Step 4: Change the Default SSH Port<\/h2>\n\n<p>Find this line:<\/p>\n\n<pre>#Port 22<\/pre>\n\n<p>Change it to something like:<\/p>\n\n<pre>Port 2222<\/pre>\n\n<p>Restart SSH after saving.<\/p>\n\n<hr>\n\n<h2>Step 5: Setup SSH Key Authentication (Disable Password Login)<\/h2>\n\n<p>Generate a key on your local computer:<\/p>\n\n<pre>ssh-keygen<\/pre>\n\n<p>Copy key to server:<\/p>\n\n<pre>ssh-copy-id -p 2222 yourusername@your-server-ip<\/pre>\n\n<p>Then disable password login in sshd_config:<\/p>\n\n<pre>PasswordAuthentication no<\/pre>\n\n<hr>\n\n<h2>Step 6: Install and Configure UFW Firewall<\/h2>\n\n<pre>\napt install ufw -y\nufw default deny incoming\nufw default allow outgoing\nufw allow 2222\/tcp\nufw allow 80\nufw allow 443\nufw enable\n<\/pre>\n\n<hr>\n\n<h2>Step 7: Install and Configure Fail2Ban<\/h2>\n\n<pre>\napt install fail2ban -y\nsystemctl enable fail2ban\n<\/pre>\n\n<p>Edit jail.local:<\/p>\n\n<pre>\n[sshd]\nenabled = true\nport = 2222\nmaxretry = 3\nbantime = 86400\n<\/pre>\n\n<hr>\n\n<h2>Step 8: Install Automatic Security Updates<\/h2>\n\n<pre>\napt install unattended-upgrades -y\ndpkg-reconfigure unattended-upgrades\n<\/pre>\n\n<hr>\n\n<h2>Step 9: Enable Swap (Optional but Recommended)<\/h2>\n\n<pre>\nfallocate -l 1G \/swapfile\nchmod 600 \/swapfile\nmkswap \/swapfile\nswapon \/swapfile\n<\/pre>\n\n<hr>\n\n<h2>Step 10: Secure Shared Memory<\/h2>\n\n<p>Add this to <code>\/etc\/fstab<\/code>:<\/p>\n\n<pre>\ntmpfs \/run\/shm tmpfs defaults,noexec,nosuid 0 0\n<\/pre>\n\n<hr>\n\n<h2>Step 11: Install Malware Scanner<\/h2>\n\n<pre>\napt install clamav -y\nfreshclam\n<\/pre>\n\n<hr>\n\n<h2>Step 12: Monitor Your Server<\/h2>\n\n<p>Install Netdata:<\/p>\n\n<pre>bash <(curl -Ss https:\/\/my-netdata.io\/kickstart.sh)<\/pre>\n\n<hr>\n\n<h2>Optional Advanced Security Measures<\/h2>\n\n<ul>\n<li>Disable unused services<\/li>\n<li>Hide SSH version<\/li>\n<li>Install CSF firewall<\/li>\n<li>Configure rate limiting<\/li>\n<li>Setup log monitoring alerts<\/li>\n<\/ul>\n\n<hr>\n\n<h2>Security Checklist Summary<\/h2>\n\n<ul>\n<li>\u2714 System updated<\/li>\n<li>\u2714 Root login disabled<\/li>\n<li>\u2714 SSH port changed<\/li>\n<li>\u2714 SSH keys enabled<\/li>\n<li>\u2714 UFW firewall configured<\/li>\n<li>\u2714 Fail2Ban active<\/li>\n<li>\u2714 Automatic updates enabled<\/li>\n<\/ul>\n\n<hr>\n\n<h2>Common Mistakes to Avoid<\/h2>\n\n<ul>\n<li>Enabling firewall before allowing SSH<\/li>\n<li>Disabling password login before adding SSH keys<\/li>\n<li>Closing SSH session before testing new port<\/li>\n<li>Forgetting to restart SSH after changes<\/li>\n<\/ul>\n\n<hr>\n\n<h2>Final Thoughts<\/h2>\n\n<p>A properly secured Linux VPS dramatically reduces the risk of hacking, brute-force attacks, and service interruptions.<\/p>\n\n<p>If you follow this guide step-by-step, your server will be significantly more secure than a default installation.<\/p>\n\n<hr>\n\n<h2>Need a Secure VPS?<\/h2>\n\n<p>If you're looking for a high-performance Linux VPS with reliable uptime and support, check out our VPS plans.<\/p>\n\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>If you\u2019ve just purchased a Linux VPS, securing it should be your first priority. A default VPS setup is vulnerable to brute-force attacks, bots, and automated scans within minutes of&#8230; <a href=\"https:\/\/www.vm6.co.uk\/blog\/2026\/03\/10\/how-to-secure-a-linux-vps-complete-step-by-step-guide\/\" class=\"read-more\" style=\"color: #fbbf24;\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":316,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[44,2],"tags":[37,25,82,5],"class_list":["post-314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dedicated-servers","category-vps-hosting","tag-guide","tag-linux","tag-secure","tag-vps"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Secure a Linux VPS (Complete Step-by-Step Guide) - VM6 Networks<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vm6.co.uk\/blog\/2026\/03\/10\/how-to-secure-a-linux-vps-complete-step-by-step-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Secure a Linux VPS (Complete Step-by-Step Guide) - VM6 Networks\" \/>\n<meta property=\"og:description\" content=\"If you\u2019ve just purchased a Linux VPS, securing it should be your first priority. 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