Malware & Rootkit Scanning: rkhunter and ClamAV Guide
Protect Linux servers against malware and rootkits: rkhunter and ClamAV setup, scan configuration, reading results, scheduled scans and response.
14 min
malwarerootkitrkhunter
Fail2Ban Configuration: SSH Brute-Force Protection Guide
Protect servers against SSH brute-force attacks with Fail2Ban: setup, jail.local, Nginx/Apache jails, IP whitelisting, ban monitoring and alerts.
13 min
fail2banbrute-forcessh security
WireGuard VPN Server Setup: Step-by-Step Guide
Set up a WireGuard VPN server: key generation, server and client configuration, IP forwarding, firewall rules, and Windows/Linux/Android client setup guide.
15 min
wireguardvpnserver security
Zero Trust Network Security: Basic Configuration Guide
Zero Trust network security in practice: never trust, always verify; micro-segmentation, identity-based access and implementation with Linux tools.
14 min
zero trustnetwork securitymicro-segmentation
SSH 2FA Setup: Security with Google Authenticator
Set up two-factor authentication (2FA) for SSH access. Google Authenticator PAM module, TOTP setup for SSH, backup codes, testing, and troubleshooting guide.
12 min
2fatwo-factor authenticationgoogle authenticator
iptables vs nftables: Comparison and Migration Guide
Comprehensive comparison of iptables and nftables, nftables syntax, migration guide, common rule equivalents, and when to use which firewall tool.
13 min
iptablesnftablesfirewall
Port Forwarding and NAT Configuration: iptables Guide
NAT concepts, DNAT/SNAT rules, port forwarding with iptables and nftables, masquerading, and use cases: game servers, web servers behind NAT.
13 min
port forwardingnatiptables
10 Essential Steps for Server Security
10 essential steps to secure a Linux server: SSH key authentication, firewall, Fail2ban, automatic updates and DDoS protection, explained with commands.
12 min
server securitylinux securityssh
Network TrafficInbound— GbpsOutbound— Gbps