Summary: DNS Flag Day was February 1st, 2019. On this day, a number of major DNS software and service providers, including Google, Cisco, and Cloudflare, stopped supporting workarounds for DNS authoritative systems that didn’t support EDNS (Extentions to DNS).<br> EDNS, which was standardized in 1999 and updated in 2013, makes DNS more efficient and allows the creation of new functionality such as DDoS protection.<br> However, workarounds deployed to accommodate non-compliant systems added complexity and made the service harder to operate. By ending backwards-compatibility, service providers, Web giants, and organizations such as the Internet Systems Consortium hope to compel operators to upgrade and take full advantage of DNS’s capabilties.<br> On today’s Heavy Networking we discuss DNS Flag Day and its potential impacts on non-compliant systems, examine EDNS, and more. Our guest is Cathy Almond, Sr. Support Engineer and Team Lead at the <a href="https://www.isc.org/" target="_blank" rel="noopener">Internet Systems Consortium</a>.<br> Show Links:<br> <a href="https://www.isc.org/blogs/dns-flag-day/" target="_blank" rel="noopener">DNS Flag Day – February 1, 2019</a> – Internet Systems Consortium<br> <a href="https://etherealmind.com/tech-notes-dns-flag-day-february-1-2019/" target="_blank" rel="noopener">Tech Notes: DNS Flag Day – February 1, 2019</a> – EtherealMind<br> <a href="https://dnsflagday.net/" target="_blank" rel="noopener">2019 | DNS flag day</a> – DNS Flag Day.net<br> <a href="https://kb.isc.org/docs/dns-flag-day-will-it-affect-you#how-will-dns-flag-day-affect-dns-hosting-service-providers" target="_blank" rel="noopener">Knowledge Articles-DNS Flag Day – will it affect you?</a> – Internet Systems Consortium<br> <a href="https://kb.isc.org/docs/dns-flag-day-notes-for-authoritative-zones" target="_blank" rel="noopener">Knowledge Articles-DNS Flag Day – Notes for Authoritative Zone Owners and DNS Hosting Companies</a> – Internet Systems Consortium<br>
