Monthly Archives: February 2019

Trusted TLS with Postfix

If you’re seeing a lot of messages about untrusted TLS connections in your mail log when running postfix like this…

Untrusted TLS connection established to ASPMX.L.GOOGLE.com[172.217.197.27]:25: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)

… there’s a pretty easy fix.

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I fell off my trainer

I’m probably one of the few people who can honestly claim that they fell off a bike trainer.

Keep in mind that, when riding on a bike trainer, the bike is locked in place on the trainer and it can’t move.

Nonetheless, I managed to fall off my trainer. Well, more like catapulted off.

This happened quite a while ago … I was using the Zwift training software with my Kinetic Road Machine dumb trainer.

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Good Customer Service from Road iD

A number of years ago I purchased a Road iD bracelet so, if I crashed during a ride, anyone who tried to help me would know who to contact if I wasn’t able to tell them.

I’ve worn that bracelet for most, if not all, my rides. It’s gotten kind of beat up over the years.

At this point the metal plate with the emergency contact information is pretty scuffed up and almost illegible.

While browsing the Road iD web site, I noticed they have a lifetime guarantee.

Yesterday I sent their customer service department a note indicating that the plate is scuffed and illegible … and they responded, within about an hour, indicating that they would provide a replacement.

They confirmed the information for the bracelet and shipping address … and said it would be sent out that day.

Today I got the shipping confirmation of the replacement.

That’s good customer service.

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Http/2, Apache, & Lightsail

This post only covers the technical details of how to implement http/2 on an Apache web server running in Amazon Linux on Lightsail. It does not go into the details of what http/2 is or why use it. For that information, I suggest https://http2.github.io.

First you have to switch the Multi-Processing Modules (MPMs) from pre-fork (the default) to another one. I chose the event mpm for no particular reason.

To do this, edit /etc/httpd/conf.modules.d/00-mpm.conf and make the following changes …

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Temporary Wahoo RPM Cadence Mounting

If you’re like me, when cycling, you prefer to have a bike computer and some sensors with you on a ride.

On a recent vacation, where I rented a bike, I brought my bike computer (Garmin Edge 1030) and my Wahoo RPM Speed & Cadence sensors along.

The RPM Speed sensor mounted fine on the bike’s hub using its built in rubber bands.

The issue was with the cadence sensor.

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Cycling Sensors

There are so many options available for cycling sensors this post will only be able to scratch the surface.

There are numerous sensors available and various configurations. I’m going to try and highlight a few that I like and the few that I don’t like.

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