Devices: World's Smallest Server Rack, Purism, Open AirGradient, and PacketFilter Appliances
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I Made The World's Smallest Server Rack - With UPS and SSD Storage - The DIY Life
Having your own home server rack or homelab is really useful, but you have to have a relatively large space to set it up, it generates a lot of heat and can be pretty noisy. So that’s why I built this, the world’s smallest server rack that fits right in on my desk alongside a drink or cup of coffee.
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Swinging Back to Open Standards - Purism
History is a series of pendulum swings between opposite extremes. A generation moves in a certain direction, and the next generation reacts based on the consequences (often rejecting it). Eventually a new generation appears that never directly experienced the consequences and lessons from the previous generations, who then moves back toward that direction and the cycle continues. If you are alive long enough, you will eventually get to see a trend go through its full cycle (such as with high-rise/low-rise jeans or centralized/decentralized computing) and along with it, be able to make some predictions about where the current trend is going.
Over the past few weeks we have seen a massive shift away from a centralized, proprietary social media platform (Twitter) onto a decentralized, federated, open one (Mastodon) that along with a few other indicators points to the pendulum starting to swing back toward an interest in open protocols, networks, and technologies beyond social media. In this post I will talk about the last time this shift happened, and how we can apply the lessons we learned from that experience to today.
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DIY air quality monitor is based on Wemos D1 mini ESP8266 board, Sensirion SGP41 TVOC sensor - CNX Software
Open AirGradient is a DIY air quality monitor based on the Wemos D1 mini ESP8266 WiFi IoT board programmed with Arduino and fitted with a range of sensors including an optional Sensirion SGP41 TVOC sensor through a custom PCB designed with EasyEDA.
Two versions of Open AirGradient are available. The Basic model includes an OLED display, a Plantower PMS5003 PM sensor, a Senseair S8 CO2 sensor, and SHT30 or SHT31 temperature & humidity sensor, while the Pro version adds a larger display, a plastic enclosure, and support for the SGP41 TVOC sensor.
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BSD PF firewall has one extra scrub option - Jon’s FOSS Blog
The BSD PacketFilter firewall has an extra scrub option which is, “reassemble tcp”. I was researching and exploring the different types of fragmented/segmented protocol packets that could be forwarded within a network that may have a smaller MTU link in the middle of the routing path. I am still exploring what could be done in Linux to achieve a similar operation!