¿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.
Regards! A good amount of knowledge.
online canadian pharmacy with prescription prescription drugs without prior prescription canadian pharmacy 3
Its very well written; I love what youve got to say. But maybe you could a little more in the way of
content so people could connect with it better. Youve got an awful lot of text for only having one or
two pictures. Maybe you could space it out better?
[url=https://sildenafil100mg.store/#]canada drug sildenafil[/url] sildenafil 50 mg tablet coupon
Thank you! I like this!
australian pharmacy online over the counter drug store global pharmacy canada order form
Whoa a good deal of awesome advice!
most reputable canadian pharmacies [url=https://canadianpharmacyonlinedb.com/]Theo-24 Cr[/url] best price canadian pharmacy
rx pharmacy com [url=https://canadapharmacies-24h.com/]erectile dysfunction remedies[/url] canadian association for pharmacy distribution management
Effectively voiced without a doubt. !
alprazolam online pharmacy [url=https://canadianpharmacyonlinedb.com/]canadian pharcharmy online viagra[/url] amazon prescription drugs
sending prescription drugs through mail [url=https://canadapharmacies-24h.com/]legitimate canadian online pharmacies[/url] humana rx mail order pharmacy
the case, then you're almost certainly acquainted with on-line
casinos. Online casinos permit you to Enjoy your preferred On line casino game titles with the consolation of your property.
Nonetheless, when you are new to on-line casinos, you might be questioning which one particular
is the best suit for you. With this blog article, we
will take a look at a few of the preferred
online casinos and make it easier to discover the
finest healthy for your preferences.
AW8 is for casino gamers who want a trusted lover that can help them consider their cash
to the subsequent degree.
You don't have to be described as a math skilled
to are aware that successful at casino game titles is about expanding your odds.
In case you enhance the odds with your favor, you increase your likelihood of winning.
That's where AW8 comes in.
AW8 is really a betting technique that's intended
To optimize your likelihood of winning in the roulette table.
It is really at present being used by Many casino gamers all
around the planet.
AW8 is the sensible, Protected technique to appreciate your favorite On line casino online games.
or teaching in the field of pharmacy.
Theo-24 Cr family pharmacy online mail order prescription drugs from canada
I suppose you made certain good points in features also.
[url=https://canadiandrugpharmacy.best/#]canadian pharmacy online[/url] online canadian drugstore
https://pharmacyshippingtousa.icu/# canada medications
[url=https://sildenafil100mg.store/#]sildenafil viagra[/url] sildenafil 25 mg uk
https://datingsiteonline.site/# find my dating
[url=https://pharmacyshippingtousa.icu/#]canada pharmacy estrogen without prescription[/url] top online pharmacies
Money and freedom is the best way to change, may you be rich and continue to help others.
cannabis strain ice cream cake
They're very convincing and will certainly work. Still, the posts are
too quick for newbies. May you please prolong them a little
from next time? Thank you for the post.
Many thanks! An abundance of data.
online prescription [url=https://canadadrugspower.com/]prescription drugs canada legal[/url] discount online canadian pharmacy