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Showing posts from October, 2025

Top 10 Cybersecurity Mistakes That Put You at Risk (And How to Fix Them)

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In today’s hyperconnected world, our personal data is more valuable than ever. Every login, every online purchase, and every file we store on the cloud carries digital fingerprints. Cybercriminals know this, and they are constantly improving their methods to exploit our mistakes. The majority of hacks don’t happen because systems are unbreakable — they happen because people make avoidable cybersecurity mistakes. In this article, we reveal the Top 10 Cybersecurity Mistakes That Put You at Risk , explain why they matter, and give you exact steps to protect yourself. 1. Using the Same Password Everywhere One of the most common — and dangerous — mistakes is reusing the same password across multiple websites. If just one website is breached, attackers can use that same password to access your: Email Social media accounts Banking apps Cloud storage This method is called credential stuffing . ✅ How to fix it: Create a unique password for each account. Use a pass...

How to Install Zimbra Mail Server the correct way

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  Prerequisites  OS: Ubuntu 22.04 LTS (64-bit) RAM: 8 GB+ recommended. CPU: 4 cores+. Storage space  – 50 GB+ Hostname: must resolve properly (ex: mail.example.com ) Ports open: 25, 80, 443, 7071, 465, 587 DNS Setup You need to create few records for domain to get started. They are as follows. Type Host Value A @ Your IP address A mail Your IP address MX @ mail.yourdomain.com 10 TXT @ v=spf1 a mx ip4:138.68.14.182 ~all TXT _dmarc v=DMARC1; p=quarantine; rua=mailto:admin@cybertech-arena.com; ruf=mailto:admin@cybertech-arena.com; fo=1 Auto Wait 5-15 minutes for propagation. Set Hostname and Hosts File on VPS SSH into your Contabo VPS: ssh root@your_vps_ip Set the hostname: hostnamectl set-hostname mail.yourdomain.com Replace mail.yourdomain.com  with your domain. Edit /etc/hosts : nano /etc/hosts Add your VPS IP and hostname: 123.45.67.89 mail.yourdomain.com mail Save (CTRL+O → ENTER → CTRL+X). Test: hostname -f Should print: mail.yourdomain.com Install Sy...