DEV Community: Jamsheer Ali

DNS Verification After Cloud Deployment: A Practical Guide

Jamsheer Ali — Mon, 06 Apr 2026 20:12:56 +0000

I recently wrote a guest post on techbeatly about verifying DNS after deploying apps to the cloud. It covers propagation checking, SSL verification, email routing, and common deployment mistakes.
Read the full article here: https://techbeatly.com/how-to-verify-dns-after-deploying-app-to-cloud/

PomoNoise — Free Pomodoro Timer with Built-in Ambient Noise

Jamsheer Ali — Tue, 03 Mar 2026 11:21:10 +0000

I built a free browser-based tool that combines a Pomodoro timer with an ambient noise generator.

Why I built PomoNoise

I kept switching between a timer app and a noise app while working. So I combined both into one clean page.

Features

Pomodoro timer with 25/5 work-break cycles
6 noise colors: white, pink, brown, green, blue, violet
Mix multiple noises at independent volumes
Real-time audio via Web Audio API — no looped files
Works on any device, no downloads
No signup, no ads, no limits

Check it out: pomonoise
Feedbacks are welcome. Happy to hear what features would make this more useful for your workflow.

How to Check SSL Certificates

Jamsheer Ali — Thu, 26 Feb 2026 12:12:12 +0000

An expired or misconfigured SSL certificate can take your entire site down with a browser warning. Here's how to check yours — and what to look for.

What is an SSL Certificate?

An SSL certificate is a small data file
that does two things: it encrypts the data between a visitor's browser and your server, and it verifies that your server actually belongs to you.

When a website has a valid SSL certificate, the browser shows a padlock icon and the URL starts with https://. Without one, browsers display warnings that scare visitors away and search engines penalize your rankings.

An SSL certificate contains:

Domain name
Issuer
Validity period
Certificate chain
Public key

3 Ways to Check an SSL Certificate

DNSFly SSL Checker
Browser padlock
Command line with openssl commands

Common SSL Issues

Certificate expired
Domain name mismatch
Incomplete certificate chain
Mixed content warnings
Self-signed certificate

checkout your SSL for free at DNSFly

How to Read HTTP Headers

Jamsheer Ali — Wed, 25 Feb 2026 19:52:28 +0000

Every website sends hidden information with every page load. HTTP headers control security, caching, redirects, and more — here's how to read them and what to look for

What Are HTTP Headers?

When you visit a website, your browser sends a request to the server, and the server sends back a response. Both the request and the response include headers — metadata that tells each side how to handle the communication.

Think of it like sending a package. The package itself is the web page content (HTML, images, CSS). The headers are the shipping label — they don't contain the content, but they tell the carrier where it's going, how to handle it, and what's inside.

The Headers That Matter Most

There are dozens of possible HTTP headers, but most of the time you only need to care about a handful. Here are the ones you'll see most often.

content-type
server
cache-control
location
set-cookie
content-encoding
x-powered-by

Security Headers You Should Check

Strict-Transport-Security (HSTS)
X-Frame-Options
X-Content-Type-Options
Referrer-Policy
Permissions-Policy

How to Check HTTP Headers

1.DNSFly HTTP Headers Tool
2.Browser DevTools
3.Command Line

DNS Security Best Practices

Jamsheer Ali — Tue, 24 Feb 2026 17:49:29 +0000

DNS was built for speed, not security. That's why attacks like spoofing, cache poisoning, and hijacking are still common. Here are the practices that actually protect you.

Why DNS Security Matters

Every action on the internet starts with a DNS query. When you visit a website, send an email, or open an app, your device first asks a DNS resolver to translate a domain name into an IP address. If that process is compromised, an attacker can redirect you anywhere — and you'd never know.

The DNS protocol was designed in the 1980s when the internet was a trusted academic network. It has no built-in authentication, no encryption, and no way to verify that the answers you receive are legitimate. That's why DNS attacks remain one of the most effective tools in an attacker's toolkit.

Some important things to note down for dns security

Enable DNSSEC
Use Encrypted DNS (DoH or DoT)
Choose a Secure DNS Resolver
Secure Your Email with DNS Records
Lock Your Domain and Monitor Changes

Check your DNS records: DNSFly — Free DNS propagation checker across 20+ global servers.