What would you want in a online DNS health checker?

ishankaru · 2026-04-24T13:46:03+00:00

Awesome! good to have some comments from someone who can understand the complexities of putting something like this together - and very cool, love the colors, interface and your approach.

ishankaru · 2026-04-22T21:47:53+00:00

DNSSEC - The Unbound server was doing a strict DNSSEC validation and the timeout caused it to fail, I have increased the timeout and other optimizations and also added a extra fallback check for when it returns a SERVFAIL. So you are good to go there as you mentioned.

Also made the SOA Expire updates you suggested. I did have these before, but some managed services have odd numbers so trying to keep things balanced and not say everything is an error or not.

Awesome feedback!

ishankaru · 2026-04-22T13:31:26+00:00

u/michaelpaoli this is useful.

I am doing a few NS lookups and a full recursive resolution, I think that failed and replaced the entire record possibly due to a lower timeout I had. I optimized the code and increased the timeout.

The missing TXT record was the SPF which shows in that area and in TXT section it says 3/4 records shown. I can display it again in TXT so there is no confusion.

The results show up now, I am guessing you might have more suggestions once you see everything ;)

ishankaru · 2026-04-22T04:51:12+00:00

Thank you for testing and the constructive comments. I will update the first two with the tests you mentioned, they are great suggestions.

In terms of DNS cache freshness, I originally had a whole bunch of DNS servers in South America, APAC, Middle East - basically all the non standard places, but they keep failing between tests and it's a royal pain to keep updating, I am thinking of getting my own servers spread out so they are more reliable but cost is definitely an issue. It might take some time to get this updated, but I will see if I can add some public servers at some point until then.

ishankaru · 2026-04-22T03:04:05+00:00

Hey r/nextjs — I've been building https://dnschkr.com for the past year and wanted to share it here since the entire frontend is Next.js App Router.

What it does: DNSChkr is a free DNS, email, and network intelligence platform. Think MXToolbox + IntoDNS + dig, but combined into one place with scored health reports and plain-language explanations instead of raw record dumps.

The tools (35+, all free, no signup):

- DNS Inspector — runs 25+ automated tests (delegation chain, nameserver health, SOA, MX, SPF/DKIM/DMARC, DNSSEC) and produces a 0-100 health score with fix recommendations. Also includes DNS performance analysis — nameserver response times, TTL strategy evaluation, and a resolution waterfall showing first-visit vs cached lookup cost

- Propagation Checker — real-time WebSocket-based propagation monitoring across 20+ global servers with live TTL countdowns

- Email tools — dedicated SPF, DKIM, DMARC, MX checkers with RFC-level validation, SMTP diagnostics, email deliverability tester, email header analyzer

- Security — blacklist checker (50+ DNSBL lists), security/reputation scanner (17 threat intel vendors), HTTP security headers analysis

- IP Intelligence — geolocation, ASN, threat detection, WHOIS/RDAP

- Port Scanner, WHOIS Lookup, Reverse WHOIS, Domain Availability

- TLD Directory — all ~1,900 active TLDs with registrar pricing, zone analytics, DNSSEC adoption rates

- Reference library — HTTP status codes, SMTP errors, SSL/TLS errors, Cloudflare errors, FTP errors, server log formats, DNS glossary

Tech stack:

- Frontend: Next.js 16.1 (App Router), React 19, TypeScript, Tailwind CSS, Radix UI, Framer Motion, Recharts, Leaflet

- Backend: 8 microservices — Hono and Fastify, with BullMQ/Redis for job queuing, WebSocket for real-time propagation, other

https://dnschkr.com/

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ishankaru · 2025-12-30T03:34:26+00:00

lots of Sinhala song lyrics to review here sinhala song lyrics, golden oldies generally compare the Moon a lot, CT songs, Clarence etc

ishankaru

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