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Blog / Domains & DNS

Total: 22

Fix EAI_NONAME Error in FileZilla and FTP

Fix FileZilla EAI_NONAME by checking the Host value, DNS records, resolver cache, CNAME chains, VPN settings, ports, and FTP/SFTP configuration.

Published: 11.09.2026

FTP 421 Too Many Connections from This IP: Causes and Fixes

A detailed guide to FTP 421 Too Many Connections from This IP: FileZilla, stale sessions, NAT, Pure-FTPd and ProFTPD limits, logs, and VPS diagnostics.

Published: 11.09.2026

What is _globalsign-domain-verification and how to add the TXT record

Learn what GlobalSign domain verification TXT records do, where to add the DVC, and how to troubleshoot DNS, SAN, propagation and validation errors.

Published: 11.09.2026

MX Hosting vs NS Hosting: DNS, Mail Routing, and Safe Nameserver Changes

Understand how MX hosting and NS hosting differ, where MX records belong, how nameserver changes affect email, and how to diagnose DNS and mail-routing failures.

Published: 11.09.2026

Fix "ssh_init: host does not exist" in FileZilla and SSH

Fix FileZilla and SSH host resolution errors by checking the hostname, DNS, server IP, SSH port, OpenSSH aliases, VPN, IPv4/IPv6, and logs.

Published: 11.09.2026

How to Configure Name Servers for Hosting (NSHosting Guide)

When you order hosting, the provider gives you nameservers like `ns1.host.com` / `ns2.host.com`. You set these at your domain registrar — that's the act of "pointing the domain at the hosting." Walk through the registrar-UI flow, the difference between changing NS and changing A records, custom (vanity) nameservers, and the propagation timeline.

Published: 22.09.2025

What Are NS1 and NS2?

Sibling overview to the NS1/NS2 redundancy guide. Walk through what NS1 and NS2 actually are (just authoritative nameserver hostnames), why every domain has at least two, how they relate to "DNS hosting" (often confused), the minimum-two-nameservers rule from registries, and the typical NS1/NS2 setup pattern.

Published: 26.05.2026

NS1 and NS2: Multiple Name Servers for Redundancy

Domain registrars typically require at least two nameservers (NS1, NS2). The redundancy isn't cosmetic — if one nameserver fails, resolvers automatically try the other. Walk through why this matters, how clients pick between them, best practices (geographically diverse hosts, different ASNs), and the modern extension to 4+ nameservers for high-uptime requirements.

Published: 20.03.2025

Error: Type=AAAA Host Not Found — Troubleshooting Guide

"Type=AAAA Host Not Found" means the resolver couldn't find an IPv6 address for the hostname. Often benign (IPv4-only host doesn't need AAAA) but a log-spam problem and occasional cause of slow lookups. Walk through deciding whether to add an AAAA record, configure clients to skip IPv6, or just suppress the log noise.

Published: 19.04.2026

NS Hosting: Overview and Management

NS hosting is what you pay for when you let a provider run authoritative nameservers for your domain. Walk through what NS hosting actually does, how it differs from registrar-bundled DNS, and the day-to-day operations: adding zones, propagation, troubleshooting failed lookups.

Published: 07.05.2025

DNS_PROBE_FINISHED_NXDOMAIN: DNS Lookup Failed

The user-side fix list for DNS_PROBE_FINISHED_NXDOMAIN — flush local DNS, switch resolver, restart router, reload browser, then escalate to checking the actual DNS records when the local steps don't help.

Published: 07.09.2025

Configuring Name Servers (Custom NS Records) in ISPmanager VDS

Run your own nameservers on a VDS — define ns1/ns2 in ISPmanager, glue records at the registrar, add the matching A records, and verify with dig NS. Plus the most common cause of "NS records don't match" verification failures.

Published: 17.03.2025

Managing DNS in ISPmanager

DNS administration inside ISPmanager — accessing the DNS module, adding a zone, creating A/AAAA/MX/CNAME/TXT records, defining custom nameservers, wiring mail records, and the propagation/troubleshooting checklist for when records don't appear globally.

Published: 20.02.2026

Fix: MSOID Record Not Resolving (msoid.clientconfig.microsoftonline-p.net)

When the MSOID record returns no answer at all — different from the "wrong value" case — the four likely causes are a missing record, AAAA conflict, propagation still in progress, or a resolver caching NXDOMAIN. Diagnose with dig +trace and fix each.

Published: 15.03.2025

MSOID – What Is It and How to Use It?

Microsoft Online Identity (MSOID) is the identity backbone behind Microsoft 365 and Azure auth. What it does, how it surfaces through the msoid CNAME, where Single Sign-On fits, and the few troubleshooting steps that close 90 % of the issues.

Published: 07.10.2025

Fixing "A DNS (Domain Name System) or Web Server Misconfiguration May Exist" Error

Domain resolved successfully but the reached server returned the wrong site (or the default page). Walk through DNS A record check, nameservers, web-server vhost mapping, SSL certificate matching, and local DNS cache flush.

Published: 27.07.2025

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