linux



How to Secure Your Server with UFW and iptables: A Beginner's Guide to Linux Firewalls

Greetings, friends!Configuring a network firewall is the primary and most vital step in securing any virtual server. Unprotected and open network ports quickly become targets for automated scanners, b...

Zabbix vs Prometheus: Which Monitoring System to Choose for Infrastructure in 2026?

Greetings, friends!When building and scaling corporate IT infrastructure, selecting a monitoring system becomes a fundamental architectural decision. Making a mistake at this stage can result in lost ...

How to protect the server from hacking: Setting up 2FA via Google Authenticator PAM

Greetings, friends!In modern realities, classical password protection or SSH key authorization is no longer enough if an administrator's account becomes compromised. Implementing Two-Factor Authentica...

Kubernetes vs Docker Compose: What does small business pay for?

Greetings, friends!For small companies developing digital products, the abbreviation Kubernetes (K8s) has long been synonymous with a modern, scalable backend. However, behind the flashy status of an ...

What should I do if the server's IP is blacklisted (Spamhaus, etc.)?

Suppose you have set up a mail server, prepared an important B2B email campaign with commercial proposals for client leads, or launched automated order notifications for an online store. But suddenly,...