How to configure MikroTik for a small business: a secure baseline step by step
Update RouterOS, replace the admin user, close management services, set up the firewall and a guest network — with ready-to-use commands.
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CySec blog
How-to guides
Step-by-step instructions with ready commands: MikroTik, Linux, Windows, NAS, VPN, email security and more.
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Vulnerabilities & CVE 44
How-to guides 14
Servers & systems 10
Email, passwords & people 6
Network & remote access 4
Backup & recovery 3
How to set up a WireGuard VPN on MikroTik for remote employees
Give staff secure access to office files and 1C from home — without opening RDP or Winbox to the internet.
Read articleUbuntu server hardening: the first hour after installation
A practical checklist with commands: personal admin account, SSH keys, firewall, automatic security updates and fail2ban.
Read articleHow to secure a Synology NAS: settings to change after installation
Step-by-step DSM settings: administrator accounts, 2FA, auto block, firewall, updates and immutable snapshots against ransomware.
Read articleSPF, DKIM and DMARC step by step: the DNS records your domain needs
Concrete DNS records for Microsoft 365 and Google Workspace, and a safe path from monitoring to blocking fake emails.
Read articleFortiGate secure baseline: protect the firewall itself
Personal admin accounts, trusted hosts, no management on WAN, lockout and firmware updates — the first settings for any FortiGate.
Read articleEncrypted Linux server backups with restic: step by step
Fast, encrypted, deduplicated backups to a NAS or cloud storage, with automatic retention and a restore test.
Read articleSecure nginx configuration: HTTPS, security headers and access limits
A practical checklist with ready-to-use snippets for a website or reverse proxy on nginx.
Read articleHow to encrypt company laptops with BitLocker
A lost laptop should be an expense, not a data leak. Turn on BitLocker and store the recovery keys properly.
Read articleEmail account hacked or password leaked: what to do, step by step
A calm checklist for the moment you suspect that a work account is compromised or its password appeared in a data breach.
Read articleWindows Server hardening with PowerShell: five quick wins
Disable SMBv1, stop the Print Spooler where it is not needed, enforce the firewall and secure Remote Desktop — with ready commands.
Read articleDocker security basics for small teams
Containers are not automatically secure. Published ports, root users and old images are the usual problems — here is how to fix them.
Read articleProxmox VE security checklist: protect your virtualization host
One hypervisor runs many servers — if it falls, they all fall. 2FA, firewall, separate management network, backups and updates.
Read articleHow to turn on MFA for the whole company in Microsoft 365
Security Defaults give every Microsoft 365 user multi-factor authentication in a few clicks. Step by step, with tips for a smooth rollout.
Read articleLet's make your IT secure and predictable
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