Knock-Knock
Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.
Why people recommend it
“There is https://knock-knock.net/, which is similar”
“You can also see a live view of the ASN/ISP leaderboard by going to https://knock-knock.net”
Show 2 more
“Autorun checker: KnockKnock”
“Very nice app; great job!”
Caveats and dissent
No one in these comments warned against it.
Who recommends it in their own words
From the makers not counted in the ranking
“It's on github with an MIT license: https://github.com/djkurlander/knock-knock.”
“I run an open source honeypot that collects these botnet scans”
“We are using a framework for deploying and displaying honeypot activity”
The goal is to educate people (originally my kids) about one particular aspect of cybersecurity. I love it when people use the site for this purpose. Yep, with ~80 knocks coming in per second and two 3D globe visualizations, it does make a lot of use of the browser. That said, it runs smoothly even on an iPhone browser. The server scales really well (longtime load average of 0.05 on a $6.75/year VPS :-). Thanks!
“OP here. Check out the new https://knock-knock.net.”
“I set up https://amsterdam.knock-knock.net yesterday”
Threads where it came up
- Someone is running mass vulnerability scans, spoofing AI bots like ClaudeBot 3 mentions
- Show HN: Knock-Knock v2 – Visualizing bot attacks in multi-protocol Technicolor 3 mentions
- Show HN: Knock-Knock.net – Visualizing the bots knocking on my server's door 2 mentions
- I spent $220 on Google app ads and 60% of the installs were robots 1 mention
- Ask HN: New clean macOS install. Must-have apps? Best browser? 1 mention
- Seeing and Hearing Internet Background Radiation 1 mention
Also written as knock-knock, KnockKnock, Knock Knock. Data: knock-knock.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 4
“There is https://knock-knock.net/, which is similar”
“You can also see a live view of the ASN/ISP leaderboard by going to https://knock-knock.net”
“Autorun checker: KnockKnock”
“Very nice app; great job!”