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robalex

@ robalex @programming.dev

Posts
6
Comments
6
Joined
2 yr. ago

  • Using Cloudflare CDN to synchronize a clock

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  • Ooo, great find on the delay attack. I'll read up on that one today, but I think you're right.

    The terms I'm using for this are web-native and a demo. Certainly not simple.

  • Using Cloudflare CDN to synchronize a clock

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  • Hey, author here. You're asking a couple questions, which I'll try to unpack.

    You're right to be suspicious that Cloudflare CDN servers have the right time. I tried to call out that concern in the post. Cloudflare operates time services, but their CDN is not a time service and wouldn't be operated under the same controls. How accurate those servers are is an open question.

    When writing the post I observed NTP client logs, a GPS-based clock, and the CDN-based clock report time that agreed within their stated error bounds. I've also seen NTP-synchronized and mobile network synchronized system clocks that fell outside the estimates of those other clocks. So it's an "odd one out" situation.

    But I think you are asking the right questions!

  • South Korean ISP Targeted Torrenting Customers With Malware

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  • Any better source on this?

  • A self hosted chores calendar?

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  • In theory, low-code, no-code, and LLMs would lower the effort needed but I think tinkering is a mindset. I think we need more tinkerers, so any efforts to encourage more have my support.

  • A self hosted chores calendar?

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  • I use something I created, although it doesn't stack chores to the next day. I think everyone has a slightly different set of needs for a task tracking app, so if you are able, its worth creating your own.

    https://alexsci.com/blog/personal-apps/