¿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.
Short but very pгecise information… Thank you
for sharinmg this one. A must read article!
clear their motive, and that is also happening with this post which I am reading at this time.
Kudos. Loads of info.
paper writer online website that writes papers for you paper writers write paper for me
Nicely voiced certainly. !
paper writing services for college students best online essay writing services essay writing help writing essays services
[url=https://hireawriterforanessay.com/]essay writer[/url] online essay writer [url=https://theessayswriters.com/]write an essay[/url] write my essay for free
music for writing essays https://payforanessaysonline.com
actually know what you are talking about! Bookmarked.
Kindly also seek advice from my web site =). We will have a link exchange
arrangement among us
http://fontgallery.com/__media__/js/netsoltrademark.php?d=zithromax.pro can i buy zithromax over the counter
[url=http://nikkimalgeri.com/__media__/js/netsoltrademark.php?d=zithromax.pro]zithromax 250 mg[/url] where can i buy zithromax capsules and [url=http://sc686.net/home.php?mod=space&uid=2424824]zithromax azithromycin[/url] zithromax online usa no prescription
"You can hear the ocean if you put this to your ear."
She placeed the shell to hеr ear and screamed. There was a hermit craƅ
inside аnd it pinched her ear. She never wants to goо back!
ᏞoL I know this is entirely off topic but I had to tell someone!
Regards, Valuable information.
assignment help need help writing an essay essay helper online essay typer
[url=https://service-essay.com/]pay someone to write your paper[/url] best paper writing services [url=https://custompaperwritingservices.com/]best college paper writing service[/url] custom paper
how to write a comparative essay https://writingthesistops.com
Nicely put. Kudos.
write a essay for me write this essay for me write my essay for free write my essay
blog! I guess foor now i'll sedttle for bοоk-marking
аnd adding your ᏒSS feed to my Google account.
I ⅼook forward to bｒeand new updates and will share
tһiss site with mү FaceƄook group. Chat soon!
the thought of a user in his/her brain that how a user
can be aware of it. So that's why this piece of writing is outstdanding.
Thanks!
blog. Is this a paid theme or did you customize it yourself?
Anyway keep up the nice quality writing, it is rare to see a great blog like this one today.
http://prednisonesale.pro/# prednisone 20mg price
can i purchase clomid price [url=https://clomidsale.pro/#]buy clomid no prescription[/url] clomid sale
http://prednisonesale.pro/# prednisone 3 tablets daily
zithromax 500 tablet [url=http://zithromax.pro/#]generic zithromax 500mg india[/url] zithromax cost canada
flowers.
them to her do-it-yourself scented candles.
Regards, Useful information.
[url=https://dissertationwritingtops.com/]define dissertation[/url] dissertation editing services [url=https://helpwritingdissertation.com/]dissertation uk[/url] dissertation def
http://doxycyclinesale.pro/# doxycycline price canada
where to buy clomid no prescription [url=http://clomidsale.pro/#]buy clomid no prescription[/url] order clomid tablets
Thank you! Numerous stuff!
[url=https://researchproposalforphd.com/]custom research paper writing services[/url] elements of a research proposal [url=https://writingresearchtermpaperservice.com/]college term papers[/url] term papers
I'd really like to be a part of group where I can get suggestions from other knowledgeable people that share the same interest.
If you have any suggestions, please let me know. Many thanks!