Michael Bianco

Inspecting Network Traffic on macOS

I ran into a scenario where I wanted to sniff out exactly what was being communicated by a macOS app. It’s been a long time since I’ve done any http sniffing so it great to try out some new tools. Packet Sniffing Packet sniffing is the easiest way to see what is happening on your network device. No sudo, no proxies. However, you can only see the domain being contacted for SSL requests. Great for high level activity, not great for understanding the details of what an application is doing on your computer. Using a Proxy to Inspect HTTPS Traffic In order to view HTTP traffic, you need to route all network traffic on your device through a proxy. mitmproxy is exactly what you need…

My Ergonomic Desk Setup

Years ago, I had wrist issues. After a certain point, they would just constantly hurt. Since then I’ve always tried to iterate on my desk setup each year. I sit at my computer typing a lot; investing in the tools I use every day always made a bunch of sense. I’ve spent time & money researching, purchasing, testing, etc various tools to improve my desk setup to eliminate pain. Notes from an Ergonomic Consultation One of the neat things my BigTech job provided was a session with an ergonomic consultant. Here are some notes: The screen should be at arm’s length from your body. Most likely, you should pull your screen closer to your face. The knees should be at or below the hip level. This means your desk and chair should sit lower…

Automatically Download and Rename Your LabCorp PDFs

Over the last couple of years, I’ve incrementally tried to improve my understanding of my health. Part of this is understanding my lab work and collecting the data in a way that I can personally understand and analyze it. In order to do this, I needed to download all of my past LabCorp PDFs. My goal in downloading these PDFs is to funnel them into my custom GPT, which will extract the results into a nicely formatted CSV that I can then copy and paste into Google Sheets. This enables me to easily graph, chart, and otherwise analyze my blood work results. Given the lack of a straightforward way to download all PDFs from the LabCorp website, I created scripts to automate the downloading and renaming of the PDFs for easier analysis and storage…

How to Inject Custom Code on Python Interpreter Startup

Ruby and Javascript both allow you to execute arbitrary code before your main application runs without modifying your application code. My most common use case is executing monkey patches to make it easier to debug an application. However, this is not possible with Python. This makes using development tools like pretty-traceback challenging. In my case, I work across a bunch of reports, and injecting six lines of Python into each repo is annoying (especially since many open-source repos don’t have a concept of a PYTHON_ENV, so there’s not an easy way to disable it in prod). The Magic .pth File In any engineering discipline, the more you understand the entire stack you are working with, the faster you’ll be able to fix issues…

What I’ve Learned Searching for a New Startup Idea, Part 3

This is part 3 of a series of blog posts (here’s part 1 & part 2) about what I’m learning as I hunt for a new startup idea to work on). PE Rollups Create Opportunity Private equity is rolling up every industry you can imagine 1 . Plumbers, electricians, dental offices, primary care offices, machine shops, lawn businesses, RV parks, and software. PE is brilliant at extracting returns from an unoptimized business. It’s bad at focusing on the customer and building a great product. As industries roll up, prices increase, the quality of service decreases, and opportunities for a new disruptor at the bottom of the market emerge. Why does this happen? When PE acquires a business, the original founders lose motivation…

How I Think About Insurance Products

Following up on my financial directives post, here are some of my thoughts about insurance. Nearly everyone has to purchase multiple insurance policies. It’s a constant cost you’ll have your entire financial life. It’s worth spending some time optimizing. Friends and family have asked me about this multiple times, so I’ve slowly compiled my notes for them. Here they are! Don’t Prepay, Self-Insure Instead I like to think of insurance as something you most likely never have to use. If you expect to use insurance, you’ll pay for it in increased premiums and the insurance companies will come out ahead. Then, it’s not really insurance, it’s prepayment for services you are going to use…

Vertical SaaS is Dead

Ok, not completely, but it’s a catchy headline, huh? Last year, I set out to find a new startup idea with a straightforward thesis: There’s important B2B SaaS software to build. It’s easy to feel like so much software has been built, but if you look under the surface, there’s so much that’s broken. There’s much opportunity to build B2B SaaS—especially for underserved markets. Specific markets are grossly underserved by technology. For instance, founders and engineers don’t generally build for civil engineers or landscape architects, but developers love building devtools and infrastructure. If we build modern software for these underserved markets, they’ll eagerly adopt it…

Fixing Broken Ethernet on Orange Pi 3B

I attempted to get my Orange Pi running as a tail-scale exit node. To do this, I had to enable IPv6 on the device. I ran the commands to enable the IPv6 connection, but it didn’t seem to work, so I rebooted the Orange Pi. After rebooting the Pi, the Ethernet would not connect. I ended up having to plug a screen into the orange Pi and wasted a bunch of time trying to understand why the Ethernet connection wasn’t working. I eventually ran into this blog post which indicated that there’s some low level memory issue with a recent firmware upgrade which broke the Ethernet device on the orange Pi. Super dissapointing! Here’s how to fix the ethernet across reboots…

AppleScript Tips: Inspecting Objects, Modal Dialogs, and More

AppleScript is an amazing, quirky tool within the macOS ecosystem. It enables you to control any application on your Mac, even if the original developer didn’t explicitly write an API for it. This can be incredibly useful when attempting to automate certain actions. However, the language is incredibly weird and confusing, especially to a "real" software developer. I’ve compiled a list of tips and tricks below that help me write various tools and scripts to automate my computer (I’ve written about applescript before in case you are looking for other tricks)…

Financial Directives for a New Graduate

Writing creates clarity, and defining directives for various areas of your life is an interesting exercise. I first ran into this idea via Derek Sivers: "It’s just a succinct and powerful way to communicate an idea. Focus on the action." I’ve tried distilling my personal investing principles as a series of directives. My siblings and other younger people I know also ask for my financial advice. This post is partly an effort to make it easy to share my thinking with others when it comes up so I don’t need to repeat myself. Obviously, I’m not a financial advisor, lawyer, CPA, etc. I’ve simply written down my personal opinions…

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