
¿Que es el DNS Flag Day?
El día en el que veremos internet arder (el apocalipsis)….
El 01 de febrero de 2019 cuatro de los principales proveedores de DNS Resolver, realizarán un lanzamiento de su software con una característica en común; la cual, es que se manejará el estándar EDNS de forma estricta. Esto presenta el fin de parches temporales históricos que perdonaban ciertas conductas desviadas del estándar en los servidores DNS autoritativos.
Dentro de los problemas que se tienen se encuentran:
- DNS autoritativos que bloquean respuestas.
- Malas implementaciones de DNS que no siguen los estándares.
- Protecciones de seguridad (Firewalls, IDS/IPS, etc) mal implementados o con malas practicas que bloquean el trafico que sigue el estándar.
- Los Resolver deben esperar timeout y reintentar con TCP y sin EDNS.
Por estos días algunos DNS públicos (Google, Facebook, PowerDNS, CloudFlare, Quad9, Cisco, etc) también realizaran estos cambios.
¿Qué es EDNS RFC 6891?
Define un mecanismo compatible con DNS para indicar soporte para nuevas opciones incluyendo soporte para paquetes más grandes (sobre 512 bytes), más códigos de respuesta, etc.
¿Para qué sirve EDNS?
Es requerido para para que funcionen las siguientes extensiones:
- NSID -- RFC 5001: identificación de instancia del servidor
- DNSSEC -- bit DO: por favor, responda con registros DNSSEC
- Client-subnet, RFC 7871: desde qué red viene esta consulta?
- Keep-alive, RFC 7828: timeout variable para DNS sobre TCP.
- Cookies, RFC 7873: mecanismo liviano de seguridad.
- Las nuevas extensiones y funcionalidades que en el futuro se puedan adicionar...
¿Qué impacto tiene este cambio sobre el modulo GTM/DNS de F5?
Dado que el servicio de GTM/DNS de F5 es un servicio de DNS y una de sus implementaciones es responder de forma autoritativa, éste debe seguir el estándar DNS y cumplir de forma estricta los RFC’s que definen el servicio.
Por esto se hace necesario realizar una validación de los servicios que pasan por F5 GTM/DNS con el fin de prevenir una posible afectación del servicio.











familiarity on the topic of unpredicted feelings.
http://vixkingston.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com prescription pricing
[url=http://eforester.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com]online canadian pharmacy with prescription[/url] canadian prescription drugstore
very forced me to try and do it! Your writing taste
has been amazed me. Thank you, quite great post.
subject and didn't know who to ask.
sharing in delicious. And obviously, thank you to your sweat!
Then look no further than our chat rooms! Our fully nude chat girls are
waiting to chat with you about anything and everything.
http://pinchapenny.info/__media__/js/netsoltrademark.php?d=noprescriptioncanada.shop canadian pharcharmy reviews
[url=http://kbalens.net/__media__/js/netsoltrademark.php?d=noprescriptioncanada.shop]canadian pharcharmy online[/url] canadian pharmacy generic viagra
http://lgvleasing.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com reputable online canadian pharmacy
[url=http://grantdino.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com]canadian drugstore prices[/url] canada drugs no prescription
http://rxrealty.org/__media__/js/netsoltrademark.php?d=noprescriptioncanada.shop onlinecanadianpharmacy com
[url=http://ivirtual.net/__media__/js/netsoltrademark.php?d=noprescriptioncanada.shop]non prescription on line pharmacies[/url] list of 24 hour pharmacies
Looking through this post reminds me of my previous roommate!
He always kept talking about this. I will forward this article to
him. Pretty sure he will have a great read. Many thanks for sharing!
http://intergalacticspaceship.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com accredited canadian pharmacies
[url=http://centricity.pro/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com]aarp recommended canadian pharmacies[/url] mexican pharmacy online reviews
up and let you know a few of the pictures aren't loading correctly.
I'm not sure why but I think its a linking issue. I've tried it in two different internet browsers and both show the same outcome.
Besides, let’s monetize your website and propel
you into Google’s Top 10! Your site deserves that.
Using unique recently developed by our IT engineers software, as well as advanced
search engine strategies, we can create backlinks from trusted
forums, sites, blogs, social bookmarks and networks, wiki
and so on to your website. As a result, our backlinks
are coming naturally from relevant and authoritative webpages where the link is followed with a descriptive
anchor and are placed contextually within the editorial content.
This is arguably the shortest way to propel you into Google’s Top
10.
According to our 17 year experience, using our SEO methods and
strategies, average advance period in TOP-10 search engines is about 3-6
months (high-frequency queries), and with the integrated promotion of the site it will be in the
top 10 search engines (some requests) within 2-3 weeks.
So, let’s increase a thousand times the number of high PR
backlinks from trusted Internet resources to propel you
into Google’s Top 10 and monetize your web site together!
A free Backlinks Report for your website is available on request.
Just provide us with the following information below about your website,
let us work on your project 2-3 days for free, and send you the Report.
All the high PR backlinks to your site gained during
this trial period will remain yours anyway.
1. Full website URL:
2. Website name:
3. Keywords (if no, we will choose ourselves):
4. Target category (if no, we will choose ourselves):
5. Small description of your services/goods (up to 250 words):
6. Full description of your services/goods (250-500 words):
7. Contact phone and email:
8. Twitter URL (if any):
9. Profile Image (if any):
Voldemar K.
Telegram - @Voldemar_2022;
WhatsApp +98 903 5688147
http://riotside.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com canadian pharmacy voltaren
[url=http://bestextract.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com]canada drug stores[/url] legitimate online canadian pharmacies
http://www.eqsalesrep.com/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com/ mexican pharmacy online medications
[url=http://www.mercuryinsurancesucks.biz/__media__/js/netsoltrademark.php?d=noprescriptioncanada.com]meds without a doctor s prescription canada[/url] best canadian pharmacy no prescription
I'm kinda paranoid about losing everything I've worked hard on. Any suggestions?