Ritik Kumar

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Ritik Kumar

Backend Engineer
Computer Network Enthusiast


Networking when you google

I took a lecture aimed at explaining what happens when you google something. It was more like how a website is accessed from networking perspective. This lecture touches:

  • The Transport layer protocols
    • TCP
    • UDP
  • Explains what happens when we search for a website on the browser
    • DNS
    • Packet exchange on the network

Check this out here

read more...


Realtime Results Livestream

Get ready for a quick tech thrill! Last month, we dove into a time-sensitive project for the West Bengal state elections - a 5+ hour YouTube Livestream featuring real-time data in a dazzling design. This blog spills the secrets behind the scenes, from coding marathons to unexpected triumphs. Fasten your seatbelts - it’s a tech spectacle you won’t want to miss! 💻🌐🎥

Now, let’s get real. We had zero experience with a programmatically defined dynamic Livestream. None. Nada. Zilch. But hey, where’s the fun in sticking to the tried and tested?

The Stream Design

I already had the idea to add a dynamically generated state map based on the party’s colour with a lead on the constituency. This is what we (I and Karthik(Karthik Iyer)) envisioned our final design to be: read more...



I scanned all my broadband peers

Hold onto your internet connection because things are about to get interesting! I recently went on a scanning spree, unveiling the mysteries of my broadband peers and the results? Mind-blowing! 📡🔍 Ready to dive into the fascinating world of broadband revelations? Let’s roll! 🚀💻

My internet broadband provider is one of the popular Internet service providers in this region. I have been their customer for quite some time now. Though comments and reviews may point otherwise, I am satisfied by their service in my region with close to promised speeds mostly.

They use NAT and provide static IPs under the 10.0.0.0/8 private block, and if I am not wrong, this same subdomain is used in West Bengal’s operational area. As of this moment, they don’t block any cross-customer communication. This makes it possible to scan the entire network. And as I have mentioned later, this may be a security concern.

The masscan configuration used for the scan was: read more...



DNS and Privacy

Ever felt like your internet journey is a little too exposed? As you surf anonymously, websites slyly snatch your public IP address, and your ISP lurks, peering into your every click. It’s the perfect stage for unwanted surveillance, with the potential to tweak your routing behaviour and block access to your favourite sites. Enter the unsung hero: DNS.

In this blog, we’re delving into the world of online invisibility. I’ll spill the beans on the latest tech tricks that can cloak your browsing habits from the prying eyes of ISPs, with a special focus on the wizardry of DNS. Ready to discover the secrets to a more private online experience? Let’s dive in!🚀🔍

Domain Name System

DNS is the phonebook of the Internet. It’s a global database of information about domain names. In simple terms, it helps convert medium.com into 104.17.31.52 which computer networks actually understands and can route your request to. read more...