¿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.
Kudos. Ample posts.
customer service essay college essay writing services essay writing help service essay writting service
Kudos, An abundance of stuff.
working thesis thesis template define thesis good thesis statement
You said it nicely.!
cheap research paper writing service parts of a research proposal proposal writing research paper helper
[url=https://quality-essays.com/]buy essay papers[/url] pay for college papers [url=https://buyanessayscheaponline.com/]pay someone to write paper[/url] buy essays online
essay editing service online https://cheapessaywriteronlineservices.com
https://clomidsale.pro/# how to buy clomid without rx
prednisone without prescription [url=https://prednisonesale.pro/#]prednisone brand name in india[/url] prednisone buying
Awesome posts. Kudos!
[url=https://helpwithdissertationwriting.com/]phd paper[/url] dissertation writers [url=https://dissertationwritingtops.com/]phd dissertation help[/url] dissertations online
guess I'll just sum it up what I wrote and say, I'm thoroughly
enjoying your blog. I as well am an aspiring blog blogger but I'm still new to the whole thing.
Do you have any points for beginner blog writers? I'd really appreciate it.
Fantastic stuff. With thanks!
pay for college papers order custom paper pay to write paper buy a paper for college
to share my experience here with colleagues.
[url=https://writingpaperforme.com/]online essay writers[/url] how to write a reflective paper [url=https://custompaperwritersservices.com/]how to write a scientific paper[/url] writing a paper
http://doxycyclinesale.pro/# where to buy doxycycline over the counter
prednisone sale [url=https://prednisonesale.pro/#]prednisone 20mg price[/url] prednisone canada prices
http://academyspoorts.com/__media__/js/netsoltrademark.php?d=cytotecsale.pro Abortion pills online
[url=http://yournewhome.net/__media__/js/netsoltrademark.php?d=cytotecsale.pro]buy cytotec in usa[/url] where to get cytotec pills and [url=http://qihuo.org.cn/space-uid-193701.html]order cytotec online[/url] buy cytotec over the counter
the challenges. It was really informative. Your website is very helpful.
Many thanks for sharing!
Incredible quite a lot of great data!
research paper writers elements of a research proposal college term papers write my term paper
What an nice blog!
Can I scrape this and share this with my blog members?
Come check my group!
If ever your interested, feel free to come to my group and check it out.
유명인출사
유출출사
한국모델출사
출사모델
Thanks a lot and Keep up the nice work!
https://zithromax.pro/# where to get zithromax
how to get cytotec online [url=http://cytotecsale.pro/#]how to get cytotec online[/url] buy cytotec online fast delivery
Thank you. Plenty of info!
best research paper writing service best essay service essay paper writing services best paper writing services
[url=https://essaywritingservicehelp.com/]research paper writing service[/url] best cheap essay writing service [url=https://essaywritingservicebbc.com/]best essay writing website[/url] writing services
dissertation abstract https://helptowriteanessay.com
writing dissertation dissertation writing services reviews dissertation dissertation abstracts international
Please stay us informed like this. Thanks for sharing.
[url=https://phdthesisdissertation.com/]writing a dissertation[/url] phd dissertation writing [url=https://writeadissertation.com/]dissertation writer[/url] writing dissertations
I'm trying to figure out if its a problem on my end or if it's the blog.
Any feedback would be greatly appreciated.