Cloud, systems, and the plumbing in between
A field guide to the seams between cloud providers, networks, Linux hosts, and internal tooling — where operational reliability is actually built.
Field notes & tooling
Cloud, systems, and the plumbing in between.
Practical write-ups on infrastructure, networking, and operations — plus small, focused tools for cloud and systems engineers.
Latest posts
All posts →How India is using AI in 2026: from awareness to daily application
Indians have stopped asking what AI is and started asking how to use it. Here is what people across India are actually searching, and what answer engines reward.
Welcome to the new Star Computers
Why we rebuilt the site on Astro, how the new blog works, and what to expect from upcoming posts on cloud and systems engineering.
A pragmatic approach to AWS IAM policies
Four rules we use to keep AWS IAM policies least-privilege without drowning in policy sprawl — conditions, boundaries, and versioning.
The DNS 'propagation' myth and what actually happens
DNS records don't 'propagate' — they expire from caches. Here's what's really going on when you wait for a record to update, and how to make changes faster.
Topics
Tools
All tools →DNS Lookup
Inspect A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, PTR, and SRV records for any domain, with response codes and TTLs, from your browser.
Email breach checker
Check whether an email address appears in known public breaches. Uses XposedOrNot breach data; the email is never logged by this site.
MX Lookup
Find the mail exchangers for a domain, sorted by preference, with TTL. Useful for verifying MX records after a DNS change or diagnosing mail delivery issues.
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