IT security is the foundation for stable business operations - it may sound obvious, but it's worth reminding ourselves of it. In this category, we gather practical tools to protect a company from cyber attacks, data loss and downtime; however, sometimes it turns out that a specific implementation matters more than a mere list of features. Our experts test and describe key solutions: business-grade antiviruses, advanced firewalls, IDS/IPS, vulnerability scanners and traffic monitoring tools - we discuss this from both the security and usability side (e.g. port scanning, mail filtering, disk encryption). We suggest how to choose a security package for a viable IT infrastructure and budget; the most expensive doesn't always mean the best, which may suggest a need for compromise. We also discuss backups, MFA, password managers for teams and update management solutions, and each text includes practical configuration tips, feature comparisons and cost analysis. We pay special attention to tools for remote work - enterprise VPNs, Zero Trust approaches, DLP and encrypted communications - as well as configuring cloud security and integrating different systems into a coherent strategy; this often requires real-world testing and a certain amount of cautious optimism.