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Karan Saini

@karansaini.com

302 followers 386 following 52 posts

hacker, researcher. blog at karansaini.com New Delhi

Posts Replies Media

Karan Saini @karansaini.com · 02/03/2026

Except for terrorism-related content, there is little consensus among ISPs on which domains to block.

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Karan Saini @karansaini.com · 02/03/2026

MTNL’s consumer blocklist appears to derive from filtering policies meant for government offices. Services such as Telegram, Dropbox, Discord, and even Slack, are blocked.

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Karan Saini @karansaini.com · 02/03/2026

Airtel, the second-largest ISP, is blocking an entire top-level-domain (.yokohama), likely due to a regex misconfiguration. This is unprecedented. The TLD currently has around 5,000 domains, all blocked.

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Karan Saini @karansaini.com · 02/03/2026

Highlights: 43,083 domains blocked in India using DNS filtering, though this number likely represents a lower bound, owing to methodological and protocol limitations.

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Karan Saini @karansaini.com · 02/03/2026

Excited to share “Poisoned Wells,” which presents the largest point-in-time study of website blocking in India to date. I tested the blocking of 294 million apex domains across six Indian ISPs, sending 1.76 billion DNS queries in total.

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Karan Saini @karansaini.com · 29/07/2024

What is being done about caller ID spoofing in India? My piece for the Text and Context section in The Hindu today.

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Karan Saini @karansaini.com · 19/09/2023

Twitter (X) seems to no longer display a notice for when a given post has been blocked at the request of the Government. Instead, a nondescript notice is shown, simply reading "This Post is unavailable."

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Karan Saini @karansaini.com · 23/08/2023

India is on the moon

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Karan Saini @karansaini.com · 20/07/2023

Throughout 1998 & 1999, the 2600 Hacker Quarterly dedicated several of their magazine cover pages to bring attention to the "FREE KEVIN" campaign. The campaign played a significant role in helping Kevin Mitnick receive a more lenient sentence following his arrest in 1995.

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