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2026-09-22
A firewall, Fail2ban and CrowdSec respond to attacks that are already underway. An audit solves a different task: to find weak spots in the server configuration in advance — extra services, permissive SSH settings, …
Read more2026-09-22
Firewall — the first thing you set up on a new server, even before Fail2ban, CrowdSec, and auditing. Its job is simple: allow only the traffic needed by running services and drop everything else. The fewer open ports, …
Read more2026-09-22
Fail2ban protects each server individually: it only sees its own logs and doesn’t know that the same addresses attacked thousands of other machines a minute ago. CrowdSec solves the same problem — detect attacks …
Read more2026-09-22
Any server with SSH open gets scanned by bots within minutes after startup: they try common usernames and passwords, making thousands of attempts per hour. A firewall won’t help here — the SSH port must be open. …
Read more2026-09-22
Xen — a Type 1 open-source hypervisor: it runs directly on the hardware, before any operating system. The project is developed under the Linux Foundation, the primary license is GPLv2. Current version — Xen 4.22 (30 July …
Read more2026-09-22
OpenSearch — an open data search and analytics system most often used for centralized log storage. It is a fork of Elasticsearch and Kibana: in 2021, after Elastic changed the license to SSPL and the Elastic License, …
Read more2026-09-22
Metrics show something is wrong with the system: response time has increased, memory is exhausted, the share of successful requests has dropped. To understand why this happened, you need logs — records of events written …
Read more2026-09-22
UniFi — a line of networking equipment from the American company Ubiquiti: gateways, switches, Wi-Fi access points, surveillance cameras, telephony and access control. The main difference between UniFi and MikroTik is …
Read more2026-09-22
For a small office people usually buy a consumer router from TP-Link, ASUS, or Keenetic. While there are five people and one Internet link, that’s enough. When a second provider appears, remote employees, guest Wi-Fi, IP …
Read more2026-09-22
FASTPANEL — a free server control panel developed by the hosting provider FASTVPS team. It is installed on a personal VPS or a dedicated server to manage websites, databases, mail, and backups via a web interface without …
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