¿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.
Im really impressed by it.
Hi there, Yoou have done a great job. I'll cerainly digg it and individually recommend to my friends.
I am confident they'll be benefited from this site.
should be shared across the net. Disgreace on Google for
now not positioning this submit upper! Come on over and consult with my site .
Thank you =)
I have a blog based upon on the same subjects you discuss and would really like to have you share
some stories/information. I know my viewers would value your work.
If you're even remotely interested, feel free to
shoot me an e mail.
Thanks! I enjoy it!
dissertation definition dissertation editing services dissertation service dissertation service
[url=https://writingpaperforme.com/]paper writers[/url] pay to write paper [url=https://custompaperwritersservices.com/]paper writing service[/url] write my paper reviews
custom essay online https://researchpaperwriterservices.com
It's simple, yett effective. A lot of times it's hard to get that
"perfect balance" between usability and visual appeal.
I must say that you've done a very good job with this. Additionally, the blog loads
very fast for me oon Safari. Outstanding Blog!
IE nonetheless is the market chiesf and a big portion of people will leave out your fantastic wriring because of this problem.
toptorah http://www.toptorah.com/
a amusement account it. Look complex tto far introduced
agreeable from you! By tthe way, how could we bbe in contact?
get several e-mails with the same comment. Is there any way you can remove me
from that service? Many thanks!
the issues. It was really informative. Your website iss
very useful. Thank you for sharing!
no longer positive whether this publish is written via him
as nobody else realize such distinct approximately my problem.
You're incredible! Thanks!
professional essay writing [url=https://payforanessaysonline.com/]pay someone to write my college essay[/url] buying essay papers online [url=https://buycheapessaysonline.com/]buy narrative essays online[/url] buy narrative essays online are essay writing services legit [url=https://essaytyperhelp.com/]essay help[/url] essaypro [url=https://helptowriteanessay.com/]essay helper free[/url] essay helping others
once totally right. This post truly made my day. You caan not believe simply how a llot time I haad spenbt for thjis info!
Thank you!
of well being. Being in this tate makes it simpler to fall
asleep. Without tension current in your body, you will be able to fall right into a deep sleep that caan make you feel more rested and recharged once you stand up within the morning.
Relaxed, free muscles can aiid you fall asleep quicker and keep
asleep. There aare a lot of kinds of Ayurveda oils aand it takes an experienced practitioner
to understand which can work within the treatment of yohr muscles.
There are numerous oils are ueed depending in your private wants.
These oils play a big role in Abhyanga massage and work to steadiness your
doshas and assist the graceful motion of joints. Sesame and almond oils are
widespread for theiir warming skills. Sesame oil may also
be used during summer. The extent of air compression might
be either increased oor decreased primarily based in your wants.
you make blogging look easy. The overall look of your web site is fantastic, let alone the content!
essay writing tips college essays writing writing a conclusion for an essay writing services for college papers
Nicely put, Appreciate it.
research proposal writing service uk custom dissertation writing qualitative dissertation proposal thesis dissertation dissertation experts music essay writing service why money can t buy happiness essay pay to write an essay buy custom essays online paying someone to write a paper