¿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.
I've joined your feed and look forward to seeking more of your excellent post.
Also, I've shared your web site in my social networks!
Thanks a lot! An abundance of facts.
dissertation help services definition of dissertation phd thesis writing dissertation
Thank you. I enjoy this!
pay to write paper order custom paper paper writing services buy a paper for college
[url=https://essayssolution.com/]essay writer free trial[/url] write essay [url=https://cheapessaywriteronlineservices.com/]essay writer review[/url] write a essay
master dissertation https://topswritingservices.com
high-quality writing like yours nowadays. I seriously appreciate people
like you! Take care!!
http://clomidsale.pro/# how to get generic clomid without insurance
buy prednisone without prescription [url=https://prednisonesale.pro/#]buying prednisone[/url] prednisone coupon
http://citizensofhumanityjeans.biz/__media__/js/netsoltrademark.php?d=zithromax.pro zithromax antibiotic
[url=http://dunhamlawreview.com/__media__/js/netsoltrademark.php?d=zithromax.pro]zithromax cost uk[/url] generic zithromax azithromycin and [url=http://www.chaoren.group/home.php?mod=space&uid=543048]buy zithromax without presc[/url] zithromax 500
Regards, Very good information!
[url=https://essaywritingservicelinked.com/]custom essay writing service org reviews[/url] online paper writing service [url=https://essaywritingservicetop.com/]custom essay writing[/url] paper writing services legitimate
It's nice to come across a blog every once in a
while that isn't the same outdated rehashed material.
Fantastic read! I've bookmarked your site and I'm adding your RSS feeds to my Google account.
The words in your content seem to be running off the screen in Internet explorer.
I'm not sure if this is a formatting issue or something to do with internet browser compatibility
but I thought I'd post to let you know. The layout look great though!
Hope you get the problem solved soon. Thanks
Many thanks, A good amount of material.
[url=https://topswritingservices.com/]cheap custom essay writing services[/url] professional essay writing [url=https://essaywriting4you.com/]top essay writing[/url] best essay writing service 2016
http://cytotecsale.pro/# cytotec abortion pill
can i buy cheap clomid [url=https://clomidsale.pro/#]how can i get clomid tablets[/url] where to get cheap clomid for sale
https://doxycyclinesale.pro/# doxycycline 10mg cost
prednisone 40mg [url=https://prednisonesale.pro/#]where to buy prednisone in australia[/url] canada buy prednisone online
grannytips
video to make your point. Yoou obviously know what youre talking about,
why waste your intelligence on just posting videos to youur weblog when you could be givcing
uus something enlightening too read?
http://prednisonesale.pro/# buying prednisone from canada
doxycycline 2985 [url=https://doxycyclinesale.pro/#]doxycycline 400 mg brand name[/url] buy doxycycline 100mg
You made your point very nicely!!
doctoral dissertation dissertation abstracts phd dissertation help dissertation writing services
[url=https://essaypromaster.com/]write my research paper for me[/url] how to write a scientific paper [url=https://paperwritingservicecheap.com/]how to write a conclusion for a research paper[/url] essay writer website
buy essay online https://writingthesistops.com
Wow loads of wonderful tips.
essay writer review pay for paper do my paper paper writing services
Many thanks! Awesome stuff.
dissertation writing help dissertation definition phd dissertation help
[url=https://domyhomeworkformecheap.com/]my homework[/url] homework help cpm [url=https://domycollegehomeworkforme.com/]do my finance homework[/url] do my homework
essay about helping others https://cheapessaywriteronlineservices.com
Amazing many of amazing information.
[url=https://helpwithdissertationwriting.com/]phd dissertation help[/url] dissertations [url=https://dissertationwritingtops.com/]dissertation writers[/url] dissertation help