¿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.
knowledge every day by reading thes fastidious articles or reviews.
http://harvestme.net/__media__/js/netsoltrademark.php?d=zithromax1st.store cheap zithromax pills
[url=http://chartmakermedicalsuite.co/__media__/js/netsoltrademark.php?d=zithromax1st.store]can i buy zithromax over the counter[/url] zithromax 500 mg lowest price drugstore online and [url=https://forexforum.cz/members/69708-hahgignee?s=21d0f748449e58b0412c320d7df30d5b]zithromax 500 mg lowest price drugstore online[/url] zithromax buy
I will make sure to bookmark it and come back to read more of your useful info.
Thanks for the post. I will certainly comeback.
http://speedrewards.com/__media__/js/netsoltrademark.php?d=doxycycline1st.store buy doxycycline 100mg cheap
[url=http://questconsultantinnovation.com/__media__/js/netsoltrademark.php?d=doxycycline1st.store"]doxycycline uk online[/url] doxycycline 50 mg and [url=https://slovakia-forex.com/members/152000-bapedide?s=00ef04494cb1743b16c83373b6a1bc14]cheapest 40 mg doxycycline[/url] doxycycline hyclate capsules
But want to commentary on some normal things, The site taste is ideal, the articles is actually great : D.
Just right process, cheers
http://arkansas-heart-hospital.net/__media__/js/netsoltrademark.php?d=zithromax1st.store generic zithromax 500mg
[url=http://drunk-driving-attorneys.com/__media__/js/netsoltrademark.php?d=zithromax1st.store]zithromax order online uk[/url] zithromax online paypal and [url=http://www.yizun120.com/home.php?mod=space&uid=10162]zithromax 500mg price in india[/url] zithromax z-pak
https://prednisone1st.store/# prednisone 10 mg daily
[url=https://zithromax1st.store/#]buy zithromax without prescription online[/url] zithromax 500
businesses. On the web lottery is easy to Enjoy. Your lottery on the internet
account will be confirmed by kontroller. You can Participate in lottery
on the web 24/7.
Huay on line is the most reliable on-line lottery site. Huay on the net lottery delivers players the opportunity to gain tens of
millions and countless bucks in jackpots. Huay on the web
lottery provides gamers the chance to win millions and an incredible number of pounds in jackpots.
Huay on the web lottery offers players the chance to win tens of millions and many bucks in jackpots.
Huay online lottery offers players the opportunity to get tens of millions and
countless pounds in jackpots. Huay on-line lottery offers players
the opportunity to gain millions and millions of pounds in jackpots.
Huay online lottery gives players the opportunity to gain thousands and thousands and a lot of bucks in jackpots.
Huay on the internet lottery features players the
chance to get tens of millions and millions of dollars in jackpots.
Huay on the internet lottery provides gamers
the chance to acquire thousands and thousands and numerous bucks in jackpots.
Huay on the web lottery gives players the opportunity to gain tens of millions and numerous
bucks in jackpots. Huay online lottery offers players
the opportunity to earn thousands and thousands and countless
pounds in jackpots. Huay online lottery presents players the chance to earn thousands and thousands and
millions of pounds in
https://amoxil1st.store/# how to get amoxicillin over the counter
[url=https://doxycycline1st.store/#]doxycycline 100mg tabs[/url] doxycycline 30
one can effortlessly know it, Thanks a lot.
https://doxycycline1st.store/# doxycycline 200 mg capsules
[url=https://amoxil1st.store/#]amoxil pharmacy[/url] amoxicillin 500 mg price
http://valuementors.org/__media__/js/netsoltrademark.php?d=doxycycline1st.store doxycycline hyclate 100mg
[url=http://julianaproducts.com/__media__/js/netsoltrademark.php?d=doxycycline1st.store]buy doxycycline online canada[/url] doxycycline 200 mg price and [url=http://www.sanclick.com/member.php?537273-invaptive&s=abcfecc608268e80ec20b509ea5f5685]doxycycline cheapest uk[/url] doxycycline brand name india
I'm having some small security issues with my latest blog
and I'd like to find something more safe. Do you have any solutions?
actual effort to generate a really good article… but what can I say… I hesitate a lot and never manage to get nearly anything done.
http://brickyard-seacliff.com/__media__/js/netsoltrademark.php?d=amoxil1st.store buy amoxicillin 500mg
[url=http://minicurvesdatabase.com/__media__/js/netsoltrademark.php?d=amoxil1st.store]buy amoxicillin 500mg canada[/url] order amoxicillin online and [url=https://quantrinet.com/forum/member.php?s=845de543066a18f5cea18c980fdc2108&u=285599]buy amoxicillin 500mg uk[/url] amoxicillin no prescription