Documentation

Building a DNS over TLS (DoT) server

I previously posted some documentation on how to build a DNS over HTTPS (DoH) Server running Pi-Hole and/or Unbound.

There's another standard available, however - RFC 7858 DNS over TLS (DoT)

DoT isn't as censorship resistant as DoH (as it's easier to block), but does provide you with additional privacy. It also has the advantage of being natively supported in Android Pie (9), so can be used to regain control of your queries without needing to run a dedicated app link Intra, with all the issues that might entail.

In this documentation we're going to trivially build and place queries against a DoT server.

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Saab Keycase Replacement

The key for both the Saab 93 and 95 is essentially a large plastic sheath around a hidden key with some rubber buttons on the front.

Unfortunately rubber has a tendency to degrade over time, and the buttons eventually either fall out, or collapse in.

Replacement of the keycase is quick and easy, though, this documentation details how to do it, including replacing the battery. For those who prefer following a video, there's also a video tutorial at the bottom of the page

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Asus Nexus 7 Charger Port Repair

The ASUS/Google Nexus 7 suffers from an issue where the USB charging port wears out, so the charger no longer makes proper contact and the device won't charge. The headphone socket (which is on the same board) can also fail.

In order to repair this, a small board must be replaced (which will mean replacing the headphone port as well). Replacement boards are available on Amazon for about £8. It's a pretty straightforward process, and doesn't require any special tooling.

This documentation will walk you through the necessary steps (there's a video at the bottom for those who'd prefer a video guide) to remove the old USB charging port and install a new one.

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Installing iRedMail on Debian (Jessie) 8

I've run my own mail server for quite some time, but it's started to reach the point where a refresh is probably in order.

Normally, I'd prefer to build from scratch, but I thought, this time, I'd have a look at some of the "off-the-shelf" solutions that now exist. Mailinabox was quickly discounted because there's no real configurability, which doesn't sit well with me (it does simplify installation, but makes long-term management that much harder).

iRedMail seems to have a reasonable following, and a scan of it's website and documentation suggested that it is, at least, reasonably sane.

This documentation details the process I followed to install iRedMail on Debian 8 (Jessie). I used Jessie rather than Stretch (9) because that's what the VM I was repurposing was imaged with.

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Saab 9-3: Front Brake Pads and Disc Replacement

Replacing the front brake rotors and pads on a Saab 9-3 is pretty straight forward (in fact, it's almost identical - down to the caliper springs, to the process of doing the same on a Volvo S60).

Before you begin, you'll need to have made sure you've ordered the correct size of replacement disc for your car. If you're not sure what size discs you require, see my guide on how to ascertain brake disc sizes.

This documentation will walk you through the process of replacing pads and discs on your Saab 9-3. The car I've used in this documentation is a UK 2010 model, but the process should be more or less the same across the years (the caliper spring does differ in shape on earlier models though).

The process is simple, however, these are your brakes - if you don't feel entirely confident then either get a garage to do it, or get someone who is confident to help/supervise.

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