NGINX Upstream Jdomain: Dynamic DNS for Any NGINX Version
by Danila Vershinin, April 1, 2026
Learn how to use NGINX upstream jdomain for dynamic DNS resolution in upstream blocks. The jdomain module re-resolves domain names on the fly without reloads — essential for cloud and container deployments on older NGINX versions before the native resolve parameter.
Read More...NGINX Upstream Resolve: Dynamic DNS for Load Balancing
by Danila Vershinin, March 31, 2026
Learn how to use the NGINX upstream resolve parameter for dynamic DNS resolution. Keep upstream server IPs current without restarts, handle DNS failover gracefully, and compare native NGINX 1.28+ support with the upstream-dynamic module, Angie, and NGINX Plus.
Read More...NGINX Reverse DNS Module: Hostname-Based Access Control
by Danila Vershinin, February 2, 2026
Learn how to use the NGINX reverse DNS module (ngx_http_rdns) to verify client hostnames, block malicious traffic, and authenticate legitimate crawlers like Googlebot. This guide covers installation, configuration, and security best practices.
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Secure your DNS with dnsmasq, dnscrypt-proxy and Cloudflare
by Emily Serverwise, December 30, 2022
Is your internet access being censored and your privacy violated by DNS hijacking? Learn how to use Cloudflare’s secure DNS protocol to encrypt your DNS requests and bypass censorship. Our step-by-step guide shows you how to set up and configure dnscrypt-proxy on your RHEL machine using dnsmasq and NetworkManager. Protect your online activity and access the internet freely with secure DNS.
Read More...DNS caching and beyond, in CentOS/RHEL and Fedora
by Danila Vershinin, July 21, 2019
Make use of DNS caching on your CentOS/RHEL 7/8 to speed up your server even faster!
Read More...Setup CloudFlare DNS resolution in CentOS/RHEL 7 servers
by Danila Vershinin, April 22, 2018
Make that DNS resolution faster on your CentOS 7 server using CloudFlare’s new 1.1.1.1 DNS nameserver.
Read More...Choose the right DNS Nameservers for faster website performance
by Danila Vershinin, August 8, 2016
Worried about DNS performance and reliability? Use our guide and make the right choice for DNS nameservers hosting
Read More...Fix slow SSH and DNS in CentOS 6
by Danila Vershinin, September 6, 2015
Slow SSH can be a pain to work with. We have insight on the causes of slow SSH as well as quick fixes to make it faster
Read More...Recommended Web Hosting
