¿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.
clarity to your submit is simply spectacular and that i could think you're a professional on this subject.
Well with your permission allow me to grasp your feed to keep updated with approaching post.
Thank you one million and please carry on the
enjoyable work.
familiarity.
Good posts, With thanks.
philosophy paper writing service [url=https://homeworkcourseworkhelps.com/]can't do my homework anymore j geils[/url] pay someone to do my excel homework [url=https://helpmedomyxyzhomework.com/]how to do my homework[/url] can someone do my cheminstry online homework most trusted essay writing service [url=https://essaytyperhelp.com/]the college essay guy[/url] help on writing essays [url=https://helptowriteanessay.com/]help with my essay[/url] help writing essay papers
up. Thee text in your content seem to be running offf the screen in Safari.
I'm not shre if this is a formatting issue or something
to do with browser compatibility but I thought I'd post tto
let you know.The style and design look geat though! Hope you geet the issue resolved soon. Thanks
reception in Hawaii in 1979. McCain was married on the time to Carol McCain, his wife since 1965, who
had suffered a crippling automobile accident during McCain's tenure as
a POW.
Between your wit and your videos, I was almost moved to start my own blog (well, almost...HaHa!) Excellent
job. I really loved what you had to say, and more than that, how
you presented it. Too cool!
Great website, stick with it!
She learned plenty of issues, with the inclusion of how it is like
to possess a marvelous coachig nature tto have certain people without
problems fully grasp a number of gruling subject matter.
You really surpassed my desires. Many thanks for providing these valuable, trusted, revealing noot to mention easy thoughts on that topic to Lizeth.
Имел безупречный опыт заказа штендера для бессмертного полка на https://shtenderworld.ru/
Good facts. Many thanks.
will writing service southampton buy essays for cheap buy an essay buy argumentative essay online buy essay online review essay writing for kids write a resume for me do my essay for cheap can someone write a research paper for me pay someone to write my essay for me
it. I have you bookmarked to look at new stuff you post…
from PHP. I ave always disliked the idea because of the expenses.
But he'stryiong none thhe less. I've been using Movable-type on numerous websites for about a
year and am woried about switching to another platform.
I have heard excellent thiungs about blogengine.net.
Is there a way I can transfer all my wordpress content intro it?Any kind of help would be really appreciated!
I'm planning to start my own blog in tthe near future but I'm having a hard time choosing between BlogEngine/Wordpress/B2evolution and Drupal.
The reason I assk is because your design seems different then most blogs and I'm looking for something unique.
P.S Sorry for bsing off-topic but I had to ask!
has shared this impressive post at aat this time.
Fine postings. Kudos.
essay writing service ranking [url=https://englishessayhelp.com/]help with writing an argumentative essay[/url] best essay writing service [url=https://essaywritinghelperonline.com/]college essay help near me[/url] help with college essay writing smart writing service [url=https://ouressays.com/]term paper writing services[/url] research proposal summary [url=https://researchpaperwriterservices.com/]academic term papers[/url] cheap term paper
blog posts. After all I'll be subscribing to your
rss feed and I hope you write again very soon!
This is nicely expressed! !
which essay writing service is reliable [url=https://studentessaywriting.com/]case study writing service[/url] law essay writing service [url=https://essaywritingserviceahrefs.com/]essay writing service uk[/url] best online will writing service essay writing software [url=https://essaypromaster.com/]do my college paper[/url] pay someone to write your paper [url=https://paperwritingservicecheap.com/]ai essay writer[/url] pay for paper
facts I wanted concerning this subject and didn't know
who too ask.
You said it very well.!
the best online resume writing service self writing essay real estate blog writing service best law essay writing service best essay writing service reviews mba application essay writing service research papers to buy academic research proposal cheap research paper writing service dissertation proposal services
Thank you. Wonderful stuff.
cv writing service online essays for sale paying someone to write a paper for youbuy cheap essay order an essay online buy essay help writing a product or service review writing a dissertation proposal cheapest custom research papers research paper writing services proposal paragraph