Description of 464xlat in Android
Options for mosh on Android
Stratum 2+ NTP servers have multiple potential sources of error, let's experiment with lowering them.
Continuing from part 1, I run my fridge on battery.
To start, I connected the inverter to the battery, first using the 1ohm resister to allow the capacitors to pre-charge then connecting
With the instability with the power grid in the past few years, I wanted to have a plan for how to handle power being out for 24+ hours at a time. For this
When trying to figure out why ssh-agent forwarding wasn't working from Windows to an Ubuntu 22 server, I saw that build V18.104.22.168p1-Beta of Microsoft's OpenSSH port included U2F/Fido2 hardware
The motivation for this project is NTP servers in datacenters - it can be expensive to get a GPS antenna on top of other people's buildings with a wire running down into your
I'm bringing my RTC Hats [https://blog.dan.drown.org/tag/stratum2/] back online
(source code [https://github.com/ddrown/stm32-input-capture-f031] and hardware
I ported my NTP server [https://blog.dan.drown.org/embedded-ntp-server/] from
the stm32f407 to the Teensy 4.1
[https://forum.pjrc.com/threads/61581-Teensy-4-1-NTP-server]. Because I recently
switched from a cable modem
The simple description of an event loop is a program waits for an external event
from many different sources, does some processing on that event, and then waits
for the next event. It
While debugging why AWS Cognito was giving the error "Invalid base64
SAMLResponse", I didn't see many good answers on the internet.
TL;DR - double check your SAML attributes
* My SAML Identity
Setting up a Fedora Readonly Root filesystem via NFS
I saw this video of creating an encryption algorithm on the channel Gary
Gary's video goes through creating a new symmetric crypto algorithm. He says
multiple times that this is just an
I've been wanting to upgrade my home network for a few years now. My home
server/NAS can easily fill 1 gigabit, but I also didn't want to spend a lot of
Imagine you have an application that keeps track of domain names. And this
application has millions of entries in a MySQL database. How do you efficiently
find all domain names that have
Continuing from the previous post
[https://blog.dan.drown.org/kerberos-configuration/], let's see what Windows can
do with a MIT Kerberos based realm.
Windows normally uses Kerberos as part of Active Directory, but
I was looking for a way to deal with ssh/sudo authentication between multiple clients and multiple devices. I wanted something with a balance between convenience and security.
In WSL2, the default disks are virtual. Microsoft has recently added support for mapping physical disks to your WSL2 VM. I was running low on space my C: drive, so I wanted to move some of my WSL2 data to a dedicated Linux drive.
To continue from part 1 [https://blog.dan.drown.org/bluetooth-low-energy-sensor/]: I want a
wireless sensor that will last more than a month on 2x rechargeable AA or AAA
Some ideas I
I have some ideas for a low power wireless sensor. I want something that will
last more than a month on 2x rechargeable AA or AAA batteries. I first tried an
I had a dual boot Windows/Fedora machine, and I wanted to be able to run the
Fedora install as a VM inside WSL. To do this, I needed the physical disk
I'm a fan of the Teensy [https://www.pjrc.com/teensy/] line of microcontrollers.
I have a whole pile of them for various projects. When I saw that 4.1 was
Now that I got the results I wanted from my embedded NTP client
[https://blog.dan.drown.org/embedded-ntp-client-ntp-interleaved-mode-part-5/], I wanted to
convert it to an NTP server. I also wanted it to
I'll test what happens when I plug my embedded NTP client directly into my NTP
servers, bypassing the Ethernet switch. This ends my long running embedded NTP
The systems involved
Part 3 [https://blog.dan.drown.org/embedded-ntp-client-ntp-interleaved-mode-part-3/] ended
with an unexplained 3us offset, this post will reduce that.
Verifying PTP clock sync
I wanted to measure the NTP client's PTP clock sync