Mastodawn

在 #DNS 体系中，注册商处填写的 NS 记录与权威服务器上返回的 #NS 记录扮演着不同但关联的角色：

注册商设置的 NS 记录构成了域名的委托链，它是全球递归解析器寻找权威服务器的起点，决定了谁被信任来回答这个域名的查询；而权威服务器自身在响应时返回的 NS 记录，则属于该区域的区域数据，通常用于通知下游服务器该域的权威来源，常见于区域传输或缓存更新。

尽管 RFC 建议两者保持一致以确保清晰和可维护，但技术上并不要求强制同步 —— 只要权威服务器能正常响应查询，即使其返回的 NS 记录指向一个未注册或看似荒诞的域名，递归解析器仍会接受其提供的 A、#CNAME 等答案。因此，你可以在注册商处安全使用真实、可达的 NS 名称，同时在自己的 zone 文件中保留个性化的 NS「签名」，作为一种无害而有趣的极客彩蛋。

Show thread

❀𝓪𝓵𝓬𝓮𝓪𖤐 Aug 7

Lol
nationalsecurityagency.github.io
Redirects to the official #NSA site
( #CNAME https://github.com/NationalSecurityAgency/nationalsecurityagency.github.io/blob/main/CNAME )

If even government officials use #github ...

We sure must trust #microsoft now don't we
*wink wink*

Home | Open Source @ NSA

THE FOLLOWING OPEN SOURCE SOFTWARE was developed within the National Security Agency and is now available to the public.

Tom

Jun 19

Während ich mir die Performancergebnisse zu meinem metalhead.club CDN angesehen habe, ist mir aufgefallen, dass die Namensauflösung einen beträchtlichen Teil der Ladezeit für internationale User ausgemacht hat.

Woran lag's? An CNAMES!

Wieso CNAMES problematisch sein können, erfahrt ihr in diesem zweiten Blogpost, den ich während meiner Arbeiten am CDN geschrieben habe:

"Globale DNS-Auflösung durch Verzicht auf CNAMES beschleunigen" -
https://thomas-leister.de/globale-dns-aufloesung-beschleunigen-cname/

#metalheadclub #blog #dns #cname #nameserver #performance #cdn #mastoadmin #mastodon

Eugene account has moved Jun 18

CNAME record still not updated even in the authoritative DNS server

#dns #cname #cname_record

gary Jun 10

wut - back with a vps again - i hope to get vpn and r proxy working quickly and then probably quite a few subdomains if i can remember how to get dns names working with the right @ and * #cname

Neustradamus :xmpp: :linux:Apr 8

#Dnsmasq 2.91 has been released (#DNS / #AAAA / #CNAME / #PTR / #DNSSEC / #DHCP / #DHCPv4 / #DHCPv6 / #BOOTP / #TFTP / #PXE) https://thekelleys.org.uk/dnsmasq/doc.html

Dnsmasq - network services for small networks.

Trusty Feb 10

A, CNAME, ALIAS, and URL Records each have their own uses! Dive into the world of DNS with our comprehensive video guide to the differences between A, CNAME, ALIAS, and URL records 👉 https://youtu.be/mn07RUxAJRA

#dns #cname #alias #url

What are the differences among A, CNAME, ALIAS, and URL records?

YouTube

Momenul Ahmad Aug 23, 2024

Fix DNS Resolution Errors and Improve Your Website's Crawlability
Discover the impact of DNS resolution errors on your website's search engine ranking and learn actionable steps to improve crawlability and optimize your SEO.

DNS resolution errors are a common but often overlooked technical SEO issue that can significantly impact your website's visibility in search results.
READ MORE- https://www.seosiri.com/2024/08/dns-resolution.html
#DNS #CNAME #SEO

Decoding AI Overviews: Navigating the Future of SEO in Search Results

Enter AI Overviews, a groundbreaking feature pioneered by Google that leverages AI to provide users with comprehensive summaries directly within searc

Toby Scott Jul 26, 2024

The cheapest and most reliable way to host a static site is hands-down from an AWS S3 bucket. But you almost need a PhD to set it up with a custom domain and HTTPS, so hopefully this blog post helps anyone wanting to go down this avenue!

https://www.tobyscott.dev/posts/s3-hosting

#AWS #S3 #CloudFront #CDN #HTTPS #CICD #GitHub #Cloud #Hosting #Cloud #DevOps #Serverless #Scalability #Security #ManagedServices #React #HTML #CSS #JavaScript #SSL #DNS #CNAME #CertificateManager #CloudFlare #LoadBalancer

Hosting a static website from an S3 bucket

In this guide, we'll walk through the entire process involved in hosting a static website from an S3 bucket via a CDN over HTTPS with a custom domain, and finally, integrating a CICD pipeline using GitHub Actions.

Toby Scott

Daniel ツ May 14, 2024

TIL about DNS flattening is a technique used to resolve a DNS query that involves a CNAME record pointing to another domain. Instead of returning the CNAME record itself, DNS flattening resolves the final destination of the CNAME record and returns an A or AAAA record with the IP address associated with the final domain. This helps in reducing the number of DNS lookups required, improving performance, and preventing CNAME dangling

https://adil.medium.com/why-use-dns-alias-record-instead-of-cname-in-the-cloud-ca995b7a364d

#DNS #DNSflattening #cname #security #cloud

Why use DNS ALIAS record instead of CNAME in the Cloud?

Cloud providers create a resource (such as a load balancer), and provide you with a domain, such as: some-production-loadbalancer-123456.eu-west-1.elb.amazonaws.com If you remove the resource but…

Medium