¿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.
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While the running back is about to be able to enter the final 12 months of his out of law school contract, Tigers player personnel director Duke Tobin (Duke Tobin) said he needs to complete many important signings.
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'Joe is an significant member of our team. He is the member you want to invigorate and remain on the particular team for a new long time. Generally says that we all will complete typically the renewal sometime throughout training camp, ' Tobin Say.
Within recent years, typically the Tigers and broad receiver Tyler Boyd (2019), defensive take on Geno Atkins (Geno Atkins), defensive conclusion card after the start of training camp Carlos Dunlap (2018) renewed their contract with superstar wide receiver AJ Green (2015).
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Mickelsons contract value this particular year is US$1. 208 million. Their substitute Giovani Bernard (Giovani Bernard) has a basic salary associated with $3. 7 thousand this year. Bernard renewed his deal using the Tigers with regard to two years previous year, with a great average annual salary of $5. one million, ranking 13 among all running shells in the league, while Mickelson only placed 47th.
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The 24-year-old Mickelson has hurried for over 1, one hundred yards for a couple of consecutive seasons. He or she is the spine from the Tigers offense. He's the capacity to let opposition defenders miss a tackle in typically the open area in addition to accelerate the breakthrough discovery of the shielding guard. Although the quantity of yards getting in a single season has never exceeded 300 yards, Mickelson nonetheless has the ability to contribute to the transferring offense.
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'Joe played well for us. Many of us want him to settle on the staff. We all know what kind of player he is. He came to be able to they and was the winner a brand new contract, ' Tobin said. 'He is a player many of us are pleased with. Simply no matter what type of player there is in the draft next season or inside the free of charge agent market, we know that Paul may be the player all of us want. We will try out to see when we can total the renewal. '
The biggest trouble now is exactly what price each are willing to accept.
Mickelson would want the leagues top common salary of $15-16 million or in close proximity to Derrick Henrys average annual income of $12. five million as well as Melvin Gordons 8# #0 What about the typical annual salary of $0 million? And is the Tigers happy to meet Mickelson's requirements?
If the two sides cannot reach a consensus, the Tigers may make use of the franchise gamer label to keep Mickelson next year
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