Posts in Technology
Node Virtual Environment nodeenv
- 06 January 2023
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Install nodeenv python package
Error: The maximum number of rules per security group has been reached
- 06 January 2023
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How to deal with the error: “The maximum number of rules per security group has been reached.”
Philips HF3520
- 16 October 2022
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My HF3520 had a mainboard failure and my attempts to repair it also failed. I have salvaged some of the components. Trying to save the environment by keeping them out of landfill in the hope someone else needs the parts
Dell WD19TB screen flashing with M1 Mac
- 10 July 2022
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New 2022 M1 Macbook external display flickers when plugged into the Dell WD19TB docking station.
Download page including assets loaded at runtime
- 06 February 2022
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curl and wget can be used to archive a site but even with the most exotic command line switches they will omit dynamically loaded assets pulled via javascript during run time. curl and wget will not follow them and the site will not work for later offline viewing. To download all the assets including dynamically loaded data we can generate a HAR file from the developer tools view in chrome.
Arch Linux on X1 Carbon 6th Gen
- 10 January 2022
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This is a bunch of random notes on installing Arch Linux on a ThinkPad X1 Carbon 6th Gen.
Arch Linux Tips
- 10 January 2022
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This is a bunch of random tips on Arch Linux.
Pagerduty Cloudwatch integration
- 09 January 2022
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It is possible to send your own custom payload to the Pagerduty Cloudwatch integration from a Lambda (instead of via a Cloudwatch alarm). Pagerduty does not document the internals but if you publish a custom message to the SNS topic that you have a HTTPS subscription to Pager duty following these simple rules you will see the event in Pagerduty.
M5 Paper e-ink Calculator
- 27 November 2021
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I added an M5 Paper to my collection of dev boards and decided to make a basic calculator to teach my son to count. Since he is only a few months old he mostly uses it as an expensive teething device.
Python 3.10 tips
- 10 October 2021
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Handy tips and notes about Python 30.8 10, 11 and beyond.
Demystifying AWS IAM Policies: Unraveling De Morgan’s Laws and S3 Buckets Policy
- 12 September 2021
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As of September 2021 You will now get error messages that detail the source of a IAM access block for the following policy types:
TLS/SSL Certificate Authority (CA) Trust store verification
- 31 January 2021
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The CA trust store is how a TLS client establish trust with the servers offered certificates. Curl uses openssl and Python uses its own store (like Java). The store on my system is located here:
Stringer Self Hosted RSS Reader
- 27 December 2020
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My setup is using the docker compose file and a local build of the docker image
(since docker hub image is years old). Here is a dark theme (solarized) for the
CSS. Just paste this over your
stringer/app/assets/stylesheets/application.css file. I did not spend much
time on it but it looks good enough for my taste.
Intercept HTTP/HTTPS TLS traffic
- 22 November 2020
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Use open source project mitmproxy and have visibility into what iOS apps (or anything else) are sending back to their mother ship.
Moved blog to alabaster with Sphinx
- 21 November 2020
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Mostly notes to self on how to deploy and architecture / setup. Inspired by https://github.com/vincentbernat/vincent.bernat.ch
Kubernetes tips
- 08 November 2020
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The problem is solved by removing the leading slash after the podname colon separator:
Enterprise tips for AWS Workspaces and AWS Managed AD
- 08 November 2020
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fjleon of Reddit has pointed out that today many of the limitations I have written about have been solved. see the discussion on Reddit Or check the documentation for the latest.
AWS Boto KeyError endpoint_resolver in session.py when using multithreading
- 14 January 2020
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When using multithreading in Python with AWS boto to get a session I was randomly hitting this error:
Route 53 Associate multiple private hosted zones with same name
- 10 January 2020
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Can I associate multiple private hosted zones with the same domain name to the same VPC?
CloudTrail and VPC Endpoints Logging
- 10 January 2020
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Today I learnt that AWS CloudTrail does not log requests that are denied by VPC endpoint policy. The reason for this is that it would allow an attacker to exfiltrate data via CloudTrail and the VPC endpoint outside of the VPC! (For example by sending lots of requests with data you want to extract in the request fields)
Expose WSL2 To LAN
- 30 November 2019
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I need to connect to my WSL2 container from other machines on the network over SSH:
My container is assigned 172.24.208.2 and I will map 5022 to 22 on the host.
Cloudwatch Loginsights handy queries
- 26 November 2018
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Find all requests matching URL
Empty the clipboard as keystrokes with AutoHotKey
- 01 January 2018
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This is an AutoHotKey script for pasting the clipboard contents by simulating hardware keystrokes. It also fixes for stuck keys such as control and shift keys after the shortcut runs which are useful when pasting into a KVM, VMware console, RDP or Citrix session where latency is high or clipboard support doesn’t exist.
postfix/smtp[5600]: fatal: valid hostname or network address required in server description
- 25 October 2017
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Getting the error:
Introducing X-ENI or Cross Account ENI
- 24 October 2017
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Stumbled on an interesting new feature based on a commit in the AWS .net SDK which may have been released early.
Python quick dirty ping scan subnet
- 05 March 2017
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This script will automatically ping scan the subnet your host is connected to. To do this it does the following:
Proxyify application that does not support proxy
- 01 February 2016
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I have a legacy application that needs to connect over a proxy such as squid
or HAProxy to a service on the internet.
In other words I want to use netcat (nc) or something similar to proxy
traffic through a proxy using the proxy protocol (or CONNECT method).
Error when checking or applying host profile compliance “coredump partition”
- 13 May 2015
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The following error message occurs when you either
EMC VNX CLARiiON hacking MLUCLI
- 28 February 2015
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I stumbled upon on an Ebay bargain I could not resist, thankfully my old boss and good friend Wilhelm kindly allowed me to purchase a VNX 7600 with all the drives, and run the monster in a closet in our office! W.W also let me spend some time exploring the internals of the VNX. The original owner shuffled all the drives around including the sacred first 5 drives that contain the FLARE OS rendering it useless.
LiPo Charging Hack
- 01 October 2013
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When trying to charge a LiPo that had been drained to 0 voltage I was getting an error:
How to check MTU with ping on ESX (or any OS)
- 14 February 2012
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Just keep decreasing the packet size with -s flag on the ping command:
2147943712 Task Scheduler
- 20 September 2011
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When trying to get the Task Scheduler to run regardless of if a user is logged on or not.
Make any Windows window transparent
- 13 March 2011
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Everything displayed in the Windows user session is ultimately controlled by the Windows GDI Any everything displayed in a users session must run as that user (without modifying kernel or display drivers). Python provides a convenient API to control GDI.
Failover Cluster add disk fails on Windows
- 30 April 2010
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When trying to add a new cluster disk in a Failover Cluster the following error comes up in the report.