Hacker News: efesak

New comment by efesak in "Japan is gripped by mass allergies. A 1950s project is to blame"

efesak — Wed, 20 May 2026 09:14:13 +0000

The spruce and other local conifers (I live by the Bohemian Forest/Bayerischer Wald) have pollen that seems to be low allergenic by design. I know a lot of people who are allergic to birch or weed pollen, but not to spruce.

New comment by efesak in "An Interesting Find: STM32 RDP1 Decryptor"

efesak — Mon, 02 Mar 2026 17:47:37 +0000

This thing just makes it easier to dump the firmware, but it's not a revolution or anything. The STM issues have been known about for a while, and with a bit of effort, you can dump it yourself without this or any expensive tools, as I once did: https://analogic.cz/rs41-rpm411/

New comment by efesak in "How to Get a North Korea / Antarctica VPS"

efesak — Fri, 14 Nov 2025 09:01:53 +0000

Cloudflare does not have any IPv4 blocks in North Korea. Geolocation databases use RIPE as the primary source and then make estimates using various tools.

Interestingly, according to RIPE, North Korea has only assigned one IPv4 block (see https://github.com/analogic/ipgeo/blob/master/by-country/KP), whereas Antarctica has none.

New comment by efesak in "SMTP Smuggling – Spoofing Emails Worldwide"

efesak — Fri, 22 Dec 2023 08:28:08 +0000

It seems Haraka is safe (eg. poste.io stack)

> 451 Bare line-feed; see http://haraka.github.io/barelf/

New comment by efesak in "Ask HN: Which boring technology do you still use?"

efesak — Tue, 27 Sep 2022 10:29:47 +0000

Email.

New comment by efesak in "Self-hosted email is the hardest it's ever been, but also the easiest"

efesak — Mon, 05 Sep 2022 11:30:07 +0000

For only your personal use sure. If you run stack for more than couple users you will sooner or later hit problems not with software itself but with outer world.

New comment by efesak in "Self-hosted email is the hardest it's ever been, but also the easiest"

efesak — Mon, 05 Sep 2022 09:25:59 +0000

Running self-hosting email is not problem. There is so much solutions to run easily own server these days. But the main problem is that you need a lot of knowledge to do that properly - software might help but it will never be "run and forget" service type.

For example large part of IT professionals which contacts our support (https://poste.io) don't get difference between SMTP envelope and from/to headers.

New comment by efesak in "I made a simple geolocation service"

efesak — Fri, 24 Jul 2020 09:07:08 +0000

Also please see https://github.com/analogic/ipgeo daily actualized ip/country database with open license (shameless ad)

Open and freely accessible alternative to Maxmind's GeoLite database

efesak — Mon, 13 Apr 2020 08:20:27 +0000

Article URL: https://github.com/analogic/ipgeo

Comments URL: https://news.ycombinator.com/item?id=22854048

Points: 2

# Comments: 0

New comment by efesak in "We're making an open-source $30 GPS/mesh radio, would like advice"

efesak — Wed, 11 Mar 2020 12:41:23 +0000

FLARM is very bad example especialy for DIY community. They have proprietary chips, firmware and are running non opensourced protocol. Also they are actively trying to prevent reverse engineering with cryptography and killing old/diy devices with protocol timebombs...

New comment by efesak in "Ask HN: What are some interesting projects to reuse your old devices?"

efesak — Tue, 28 Jan 2020 13:26:43 +0000

Using broken phone (nexus 5x) with nice camera for timelapsing hill for paragliding club

https://croncam.com/svatobor

New comment by efesak in "How to run your own mail server (2017)"

efesak — Tue, 19 Nov 2019 19:59:44 +0000

These tutorials are nice but you can just hack https://hub.docker.com/r/analogic/poste.io (shameless ad) or any other containerized solution. You will get fully working solution in couple minutes and it will be somewhat easy to keep mailserver updated...

New comment by efesak in "Support for U2F security keys"

efesak — Tue, 11 Jun 2019 16:51:12 +0000

Try https://www.enpass.io (I sync db through Dropbox but you can use almost whatever you want...)

New comment by efesak in "Navy pilots report unexplained flying objects"

efesak — Mon, 27 May 2019 12:14:53 +0000

Uh, It just seems like insect in the sensor

New comment by efesak in "Show HN: WildDuck – Self-hosted modern email server"

efesak — Fri, 10 May 2019 20:08:26 +0000

See poste.io, it solves exactly this problem. (I've created poste because I administer multiple smaller mailserevers and thus scratching my own itch)

New comment by efesak in "Is This the Beginning of the End of the Bitcoin Bubble?"

efesak — Tue, 16 Jan 2018 21:55:05 +0000

https://en.wikipedia.org/wiki/Betteridge%27s_law_of_headline...

New comment by efesak in "Decentralization in Bitcoin and Ethereum"

efesak — Mon, 15 Jan 2018 14:52:37 +0000

I have been running multiple bitcoin and altcoin nodes and still I am not able to run public geth node synced for month on dedicated server (4c SAS disks). So if "Bitcoin Underutilizes Its Network" then Ethereum is actively destroying itself.

New comment by efesak in "OcherBook: Open-source replacement Kobo firmware"

efesak — Tue, 11 Apr 2017 15:50:20 +0000

Yes especialy kobo mini is fun device. Large community of paragliding pilots are using it as flight computer by adding GPS and pressure sensor. See http://unity.paragliding.xyz/wp-content/uploads/2015/05/Unit...

New comment by efesak in "Bitcoin's ASICBOOST Problem Explained [pdf]"

efesak — Sun, 09 Apr 2017 20:38:56 +0000

- there are ~5000 LOC of https://github.com/bitcoin/bitcoin/pull/7910/files and almost 3/4 of these lines are tests.

- Segwit actualy block harmful form of ASICBOOST

- by "growing majority" you mean handful of chinese miners and 2% of nodes (http://luke.dashjr.org/programs/bitcoin/files/charts/softwar...)

New comment by efesak in "Ask HN: Is it possible to run your own mail server for personal use?"

efesak — Sat, 13 Aug 2016 19:50:08 +0000

Sure! I run several servers (and developing them, see https://poste.io). Watch DMARC reports and give it little time, most of time it will solve itself. You can also register to feedback loop...