A rather geeky/technical weblog, est. 2001, by Bramus
Interesting read on how the folks at Cloudflare saw Facebook go down last night, and how it impacted traffic on their end. The Internet is literally a network of networks, and it’s bound together by BGP. BGP allows one network (say Facebook) to advertise its presence to other networks that form the Internet. As we …
Continue reading “Understanding How Facebook Disappeared from the Internet”
Building further upon a “wild story” by Corey Quinn, Nicholas Martin describes how to (ab)use DNS TXT records by storing data in them, as if it were a database: When you think about it, DNS configuration is actually a very rudimentary NoSQL database. You can view and modify it at any time quite easily through …
Continue reading “DiggyDB – Amazon Route53 as a blazingly fast and reliable database”
In this post Sven Luijten uses DNSControl from within GitHub Actions to manage DNS: What if you could edit a JavaScript file with your desired DNS configuration, submit a pull request on GitHub, see a preview of the changes you are about to make, and when you merge it, have those changes be applied completely …
Continue reading “Manage your DNS from GitHub with DNSControl”
dog is an open-source DNS client for the command-line. It has colourful output, supports the DoT and DoH protocols, and can emit JSON. With it supporting JSON (using the –json flag) you can easily pipe its output through the power tool jq dog, the command-line DNS client →
I like the cartoons that have been appearing for some time now over at Mozilla Hacks, in which they explain technical things in layman’s terms. The latest article again is a good one: first it explains regular DNS (pictured above), and then continues on to DNS over HTTPS. A cartoon intro to DNS over HTTPS …
Straightforward new tool by Spatie. Just enter a domain and *boom*. Open Source too. dnsrecords.io →dnsrecords.io Source (GitHub) →
At midnight UTC on New Year’s Day, deep inside Cloudflare’s custom RRDNS software, a number went negative when it should always have been, at worst, zero. A little later this negative value caused RRDNS to panic. This panic was caught using the recover feature of the Go language. The net effect was that some DNS …
Continue reading “How and why the leap second affected Cloudflare DNS”
$ traceroute 216.81.59.173 🙂
# Use name-based virtual hosting. NameVirtualHost *:80 UseCanonicalName Off # ~/Sites/ vhost configuration – sends foo.bar.dev to ~/Sites/bar/foo <VirtualHost *:80> VirtualDocumentRoot /Users/dave/Sites/%2/%1 <Directory "/Users/dave/Sites"> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> What that VirtualDocumentRoot does is map the above company and project to the %2 and %1 variables, respectively. …
Continue reading “Zero-config development with Apache’s VirtualDocumentRoot and xip.io”
xip.io is a magic domain name that provides wildcard DNS for any IP address. Say your LAN IP address is 10.0.0.1. Using xip.io: 10.0.0.1.xip.io resolves to 10.0.0.1 www.10.0.0.1.xip.io resolves to 10.0.0.1 mysite.10.0.0.1.xip.io resolves to 10.0.0.1 foo.bar.10.0.0.1.xip.io resolves to 10.0.0.1 …and so on. You can use these domains to access virtual hosts on your development web …
Continue reading “xip.io – Wildcard DNS for any IP address.”