¿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.
your articles. Stay up the good work! You recognize, many
individuals are hunting around for this information, you can help them greatly.
In the meantime, Why not promote your site and monetize its
traffic together?
I am Voldemar (Telegram - @Voldemar_2022; WhatsApp +98 903 5688147; email - aristarkh85@gmail.com) the head of a group of webmasters from Eastern Europe countries.
Using unique recently developed soft and advanced search engine strategies, we can create backlinks from trusted forums, sites, blogs, social bookmarks and networks, wiki and so on (about 300 engines and platforms) to your site on a twenty-four hour basis in automatic
and semi-automatic mode.
As a result, our backlinks are coming from relevant and
authoritative webpages where the link is followed with
a descriptive anchor and are placed contextually within the editorial content.
This is arguably the shortest way to promote your websites in the TOP 10.
According to our 17 year experience, using our SEO methods and strategies, average
advance period in TOP-10 search engines is about 3-6 months
(high-frequency queries), and with the integrated promotion of the site it
will be in the top 10 search engines (some requests) within 2-3 weeks.
Let’s increase a thousand times the number of high
PR backlinks from trusted Internet resources and monetize your
website traffic together!
In order to get free promotion and SEO Report, please fill in and send us free
SEO-order:
1. Full website URL (including www and https://):
2. Website name:
3. Keywords (if no, we will choose ourselves):
4. Target category (if no, we will choose ourselves):
5. Small description of your services/goods (up to 250 words):
6. Full description of your services/goods (250-500 words):
7. Contact phone and email:
8. Twitter URL (if any):
9. Profile Image (if any):
Just let us work on your project 2-3 days for free,
send you our SEO Report and you will see the initial results.
All the high PR backlinks to your site gained during this trial period will remain yours and are not paid for.
Once our SEO Report is approved by the Customer, we may on your
request, proceed with further SEO promotion with the following average prices:
1. One backlink from trusted websites with PR 1-2 - $6-9 (depends on your website subject)
2. One backlink from trusted websites with PR 3-4 - $11-16 (depends on your
website subject)
3. One backlink from trusted websites with PR 5
- $49-63 (depends on your website subject)
4. One backlink from trusted websites with PR 6-7 - $69-99 (depends on your website subject)
5. One backlink from trusted websites with PR 8 or more - $159-270 (depends on your website subject)
6. Step-by-step creating backlinks on a twenty-four hour basis
during one month - $250-380 (depends on website subject).
By the way, the number of created backlinks per day/month may be
restricted by the soft itself not to hurt the website, so SEO
promotion always takes its natural course.
As you see, the prices are reasonable and affordable as compared with
other webmasters. You pay only for result.
If you are not interested in your website promotion please skip this offer.
Kind Regards,
Voldemar K.
Telegram - @Voldemar_2022
WhatsApp +98 903 5688147
Email - aristarkh85@gmail.com
It's pretty worth enough for me. In my view, if all site owners and bloggers made good content as you did, the internet will be a lot more useful than ever before.
With thanks. Lots of info!
rx pharmacy world canada canadian pharmacy no scripts walmart pharmacy online account
of Neutrinos May be delivered to bear in Bounding A holographic superconductor within the Holomorphic brane MSSM.
site with us so I came to look it over. I'm definitely enjoying
the information. I'm bookmarking and will be tweeting this to my followers!
Excellent blog and superb design and style.
https://canadiandrugpharmacy.best/# best canadian pharmacy to buy from
[url=https://canadiandrugpharmacy.best/#]real canadian pharmacy[/url] safe canadian pharmacies
https://pharmacyshippingtousa.icu/# canadian pharmacy products
[url=https://pharmacyshippingtousa.icu/#]canadian pharmacy world[/url] canadian pharma companies
I am confident they'll be benefited from this site.
So great to find another person with genuine
thoughts on this topic. Really.. thank you for starting
this up. This site is something that is required on the internet, someone with
a little originality!
Thanks! I value this.
cvs caremark online pharmacy [url=https://canadianpharmacyonlinedb.com/]pharmacy evaluating exam canada[/url] canada drug prices
Seriously tons of useful facts!
medicine online shopping [url=https://canadapharmacies-24h.com/]citizens rx pharmacy[/url] cheap canadian drugs
[url=https://sildenafil100mg.store/#]generic sildenafil canada[/url] sildenafil price usa
And i am glad reading your 무료웹툰 article. But should remark on some general things, The
site style is perfect, the articles is really excellent : D.
Good job, cheers
fan.
it's good to read this web site, and I used to pay a quick visit this web site
all the time.