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↗ OpenBLD in the Independent DNS Resolver Guide

· 3 мин. оқу
Yevgeniy Goncharov
Maintainer of OpenBLD.net

OpenBLD in the Independent DNS Resolver Guide

Choosing a public DNS resolver today is about much more than picking between Google and Cloudflare.

There are dozens of public DNS services: global and regional providers, commercial services, non-profits, and community-run projects. They differ in privacy policies, filtering capabilities, DNSSEC support, encrypted DNS protocols, infrastructure locations, and logging practices.

Comparing all of them can be difficult.

🇰🇿 OpenBLD on Onehost.kz VPS NVMe SSD in Kazakhstan

· 1 мин. оқу
Yevgeniy Goncharov
Maintainer of OpenBLD.net

OpenBLD, Onehost.kz 2026

Under the hood: IPv6, AMD EPYC™, DDR4, NVMe SSD storage, and a high-speed network. A strong candidate for passing OpenBLD’s stress test.

Last year, Onehost.kz supported the OpenBLD project by providing a VPS server in Almaty. Since then, the infrastructure has demonstrated stable 99.99% uptime, with no noticeable overselling or system freezes.

zBLD vs. DGA — Detecting Algorithmically Generated Domains

· 2 мин. оқу
Yevgeniy Goncharov
Maintainer of OpenBLD.net

OpenBLD zBLD detection algorithm blocking DGA-generated domains

Malware and botnets use Domain Generation Algorithms (DGA) to generate hundreds or thousands of short-lived domains for communication with command-and-control infrastructure.

An attack example from real OpenBLD logs:

  • s-dfgfd-sdfz...zdssragv[.]mom
  • 96bccebb2f7e...wu7y6z[.]com
  • 60r...60pg0131[.]cc
  • and billions of similar domains.

Why are DGA domains harmful?​

Beyond their malicious purpose, this chaotic DNS traffic pollutes resolver caches, increases CPU and I/O usage, and generates large volumes of low-value logs. At scale, it can cause higher resource consumption and degraded DNS performance.