Dan's notes (Page 3)

More issues

AWS Cognito error message "Invalid base64 SAMLResponse"

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 Configuration * My SAML Identity Provider (IdP) is AWS SSO, and I'm using IdP initiated SAML

NFS Readonly Root Filesystem

Setting up a Fedora Readonly Root filesystem via NFS

Cryptanalysis of the Oceantoo cipher

I saw this video of creating an encryption algorithm on the channel Gary Explains: Gary's video goes through creating a new symmetric crypto algorithm. He says multiple times that this is just an experiment and not to be used with anything important. This is because crypto is challenging,

2.5 Gigabit ethernet

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 money on the upgrade. $ sudo hdparm -t /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/

Database substring indexes

Goals 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 part of a word inside of them? This article assumes some understanding of how SQL queries work.

Kerberos for Windows, without AD

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 it does have some basic support for a non-AD version of Kerberos. I'll

SSH single-sign on

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.

Mounting a dedicated disk in WSL2

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.

Bluetooth Low Energy sensor, part 2

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 batteries. Some ideas I have for what I could do with such a sensor: * indoor/outdoor temperature/humidity sensor * garage door

Bluetooth Low Energy sensor

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 esp8266 and then an esp32, but the boards I have all use 3-7mA in "deep sleep". This