urn:uuid:71de4eb8-53b2-57ee-b483-76cec6950f5b Topic: DNS – Ctrl blog Daniel Aleksandersen https://www.daniel.priv.no/ Copyright © 2022 Daniel Aleksandersen. https://www.ctrl.blog/assets/logo/logo-square.svg 2022-05-13T02:34:00Z weekly 10 urn:uuid:54c5c15f-9028-4f65-b546-ab5b2f425e20 2022-04-30T23:43:00Z 2022-04-30T23:43:00Z Common mistakes in BIMI early-adopter implementations The Brand Indicators for Message Identification (BIMI) standard has strict requirements for an email sender’s logo to show up in your inbox. 65,1% gets it wrong. <p>Two weeks ago, I wrote about the new Brand Indicators for Message Identification (BIMI) <em>draft</em> internet standard. BIMI enables businesses to get their logos displayed next to their email messages in compatible email apps and webapps. As part of the research for that article, I queried the top 3 million domains to see how many had adopted the standard. I found 6647 domains with a default brand indicator, but far from all meet the BIMI requirements.</p> <p><a href="https://www.ctrl.blog/entry/bimi-adoption.html">Read more …</a></p> urn:uuid:5eb03989-64e5-4960-b471-633415385cc0 2021-08-15T11:19:00Z 2021-08-16T16:41:00Z What domain name to use for your home network Always use the ‘.home.arpa’ top-level domain (RFC 8375), and don’t use the special-purpose ‘.local,’ or made-up undelegated domain names like ‘.lan’ or ‘.home.’ <p>There’s a definitive answer to this question, and you can find it in RFC 8375: use <code>home.arpa.</code> Never heard of it before? It wasn’t assigned as a special purpose top-level domain (spTLD) name for residential and small networks until 2018.</p> <p><a href="https://www.ctrl.blog/entry/homenet-domain-name.html">Read more …</a></p> urn:uuid:a0ca138d-1f14-4938-81af-dbae88d95471 2020-01-09T12:17:00Z 2020-01-09T12:17:00Z .blog vs .com TLD performance Traditional and established top-level domain resolves faster than the newfangled .blog top-level domain. Unsurprising, but worrisome. <p>BunnyCDN shared some interesting performance benchmarks of the name servers responsible for some generic top-level domains (gTLD). The content delivery network (CDN) provider measured Domain Name System (DNS) response times from 50 locations around the world.</p> <p><a href="https://www.ctrl.blog/entry/dotblog-tld-performance.html">Read more …</a></p> urn:uuid:fff4c0f2-4043-4acb-89c9-aac5de1151a0 2019-11-19T17:25:00Z 2022-05-13T02:34:00Z What to <link rel=dns-prefetch> and when to use preconnect What to <code translate="no">&lt;link rel=dns-prefetch&gt;</code> and when to use <code translate="no">preconnect</code> Learn the difference between dns-prefecth vs preconnect, how to work around browser bugs, and when to use which? iOS and Safari requires special attention. <p>The <code>dns-prefetch</code> resource hint is intended to look-up domain names before the browser would otherwise know that they’d be needed in the near future. It’s a quick way to speed up the loading of external page resources.</p> <p><a href="https://www.ctrl.blog/entry/dns-prefetch-preconnect.html">Read more …</a></p> urn:uuid:36adf2ba-8873-4aa3-a854-cc4791ce291b 2019-06-08T23:09:00Z 2019-08-05T19:21:00Z How to disable outgoing mDNS broadcasts on Linux Tutorial for quieting Multicast DNS using various firewall front-ends for Linux’s iptables firewall such as FirewallD and Ubuntu’s UFW. <p>Multicast DNS (mDNS) is a convenient method for auto-discovering other computers and services (DNS-SD) on the local network. However, in some situations you don’t want to announce your services or even broadcast your presence on a particular network. Here is how to block outgoing mDNS broadcasts on Linux.</p> <p><a href="https://www.ctrl.blog/entry/how-to-disable-mdns-linux.html">Read more …</a></p>