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Python application-firewall Projects
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Project mention: Show HN: Sinkzone DNS forwarder that blocks everything except your allowlist | news.ycombinator.com | 2025-08-06
Looks really streamlined!
Currently, when I need to focus, I use a separate device configured to block everything except 2-3 domains I really need to minimize distractions. What really makes Sinkzone interesting is the scheduling with focus mode which can be incredible useful. Opensnitch only lets you toggle all rules at once, so Sinkzone could be useful for allowing just the focus domains.
I think a useful feature to consider is having different profiles which would essentially be collections of domains to allow. So you could have "focus", but also "work" or "kids" as well allowing for more flexibility.
I'm currently using OpenSnitch [1] as a system-level firewall that has a similar allowlist-only functionality. While the popups to allow/reject a connection initially disturb your workflow, after a short period of usage, you end up with a small collection of rules and you'll pretty much only see them again when browsing new websites. The advantage over DNS-level blocking is that you also get to block per process and not just device (or network). Since it uses eBPF, processes can't get around it by using a different DNS server or something. I'm really missing profiles and scheduling though, so I hope you can build a viable alternative to switch to!
[1]: https://github.com/evilsocket/opensnitch
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Python application-firewall discussion
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A note from our sponsor - InfluxDB
www.influxdata.com | 1 Sep 2025
Index
| # | Project | Stars |
|---|---|---|
| 1 | opensnitch | 12,023 |
| 2 | opensnitch | 396 |
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