Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.FIPv6 ReadinessActionIPv6 records exist but unreachableFIX
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.
Learn more ▾ ▴
Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.
Source: RFC 8305 (Happy Eyeballs)
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations75 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable DNSSEC on your domain for DNS spoofing protection
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
BCDN & DeliveryCloudflareREVIEW
A+DNS Records2 A records, 8 ms lookupPASS
| A | 104.18.40.64, 172.64.147.192 |
| AAAA | 2606:4700:440b::ac40:93c0, 2606:4700:4408::6812:2840 |
| CNAME | — |
| NS | aria.ns.cloudflare.com, owen.ns.cloudflare.com |
| MX | 1 aspmx.l.google.com 5 alt2.aspmx.l.google.com 5 alt1.aspmx.l.google.com 10 alt3.aspmx.l.google.com 10 alt4.aspmx.l.google.com |
| TXT | figma-domain-verification=4f7cdfa45ca39f617dd7ba7b165e1bfd5e9b5e1ec18b849c6098df... google-site-verification=9JKw-GrEOVvonm1QE0kG-5_3sCarqE808Fad8di9jnY google-site-verification=uyUnW8L0wR0faPe6WQ7q5mn2IZV6wnS8L1Kbwo_vRDI tollbit-domain-verification=75f3703af8694dde3a13699d702342595b56e86963356e016827... SPF v=spf1 ip4:216.24.224.0/20 -all |
| CAA | Lookup not available with standard resolver |
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
ARedirect Chain1 redirect(s), 71 ms totalPASS
https://extremetech.com
31 ms · HTTP/1.1
https://www.extremetech.com/
40 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://extremetech.com | 301 | 31 ms | HTTP/1.1 | cloudflare |
| 2 | https://www.extremetech.com/ | 200 | 40 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 23 URLsPASS
# Ziff Davis content is made available for your non-commercial use subject to our
# Terms of Use here: https://www.ziffdavis.com/terms-of-use
# Use of any robot, crawler, or other tool to scrape, harvest, extract, or retrieve any content on
# this website using automated means is prohibited without written permission from Ziff Davis.
# Prohibited uses include but are not limited to:
# (1) text and data mining under Art. 4 of the EU Directive on Copyright in the Digital Single
# Market;
# (2) development or operation of artificial intelligence or machine learning software or
# databases, including by training, fine-tuning, embedding, and retrieval-augmented generation;
# (3) creating data sets containing our content or sharing it with others; and
# (4) any commercial purposes.
# Contact licensing@ziffdavis.com for assistance.
# Bot Disallows
# Block AI and other unwanted bots
User-agent: AddSearchBot
User-agent: AI2Bot
User-agent: Ai2Bot-DeepResearchEval
User-agent: Ai2Bot-Dolma
User-agent: AmazonBuyForMe
User-agent: Amazonbot
User-agent: Anchor Browser
User-agent: anthropic-ai
User-agent: Applebot
User-agent: Applebot-extended
User-agent: atlassian-bot
User-agent: AutoRAG
User-agent: AwarioSmartBot
User-agent: Big Sur AI
User-agent: bigsur.ai
User-agent: Brandwatch
User-agent: Bravebot
User-agent: Bytespider
User-agent: CCBot
User-agent: Channel3Bot
User-agent: ChatGLM-Spider
User-agent: ChatGPT-User
User-agent: Claude-SearchBot
User-agent: Claude-User
User-agent: Claude-Web
User-agent: ClaudeBot
User-agent: cohere-ai
User-agent: cohere-training-data-crawler
User-agent: Cotoyogi
User-agent: Crawl4AI
User-agent: Datenbank Crawler
User-agent: DeepSeekBot
User-agent: Devin
User-agent: Diffbot
User-agent: Direqt Anomura
User-agent: DuckAssistBot
User-agent: Echobot Bot
User-agent: FacebookBot
User-agent: Factset_spyderbot
User-agent: GPTBot
User-agent: iAsk
User-agent: iaskspider
User-agent: ICC Crawler
User-agent: ICC-Crawler
User-agent: ImageSiftBot
User-agent: imageSpider
User-agent: Kangaroo Bot
User-agent: KlaviyoAIBot
User-agent: Kunato
User-agent: laion-huggingface-processor
User-agent: LCC
User-agent: LinerBot
User-agent: LinkupBot
User-agent: LINER Bot
User-agent: Manus-User
User-agent: meta-externalagent
User-agent: meta-externalfetcher
User-agent: meta-webindexer
User-agent: mistral.ai
User-agent: MistralAI-User
User-agent: netEstate Imprint Crawler
User-agent: Novellum AI Crawl
User-agent: NovaAct
User-agent: OAI-SearchBot
User-agent: omgili
User-agent: PanguBot
User-agent: Perplexity-User
User-agent: PerplexityBot
User-agent: PeopleInc-DCipher-Scraper/1.1.0
User-agent: PetalBot
User-agent: Poggio-Citations
User-agent: QualifiedBot
User-agent: SeekrBot
User-agent: SemrushBot-OCOB
User-agent: SemrushBotSwa
User-agent: ShapBot
User-agent: SBIntuitionsBot
User-agent: Spider
User-agent: Timpibot
User-agent: TavilyBot
User-agent: TwinAgent
User-agent: Velen Crawler
User-agent: VelenPublicWebCrawler
User-agent: Webzio-Extended
User-agent: Wrtn
User-agent: YouBot
User-agent: ZanistaBot
Disallow: /
# END Ziff Managed/Shared content
# Ziff Davis content is made available for your non-commercial use subject to our
# Terms of Use here: https://www.ziffdavis.com/terms-of-use
# Use of any robot, crawler, or other tool to scrape, harvest, extract, or retrieve any content on
# this website using automated means is prohibited without written permission from Ziff Davis.
# Prohibited uses include but are not limited to:
# (1) text and data mining under Art. 4 of the EU Directive on Copyright in the Digital Single
# Market;
# (2) development or operation of artificial intelligence or machine learning software or
# databases, including by training, fine-tuning, embedding, and retrieval-augmented generation;
# (3) creating data sets containing our content or sharing it with others; and
# (4) any commercial purposes.
# Contact licensing@ziffdavis.com for assistance.
User-agent: *
Disallow: /search
Disallow: /archive/
Disallow: /cdn-cgi/
Disallow: /*?s=*
User-agent: "008"
User-agent: Ai2Bot-Dolma
User-agent: Amazonbot
User-agent: anthropic-ai
User-agent: Applebot
User-agent: Applebot-extended
User-agent: Bytespider
User-agent: CCBot
User-agent: ChatGPT-User
User-agent: Claude-Web
User-agent: ClaudeBot
User-agent: cohere-ai
User-agent: DDM-DCipher/1.0.7
User-agent: Diffbot
User-agent: DuckAssistBot
User-agent: FacebookBot
User-agent: GPTBot
User-agent: HTTrack
User-agent: meta-externalagent
User-agent: meta-externalfetcher
User-agent: Nutch
User-agent: OAI-SearchBot
User-agent: Offline Explorer
User-agent: omgili
User-agent: Perplexity-User
User-agent: PerplexityBot
User-agent: Scrapy
User-agent: Timpibot
User-agent: YouBot
Disallow: /
Sitemap: https://www.extremetech.com/sitemap-index.xml
Sitemap: https://www.extremetech.com/sitemap-news-0.xml
Sitemap: https://www.extremetech.com/sitemap-latest-0.xml
- https://www.extremetech.com/sitemap-news...
- https://www.extremetech.com/sitemap-late...
- https://www.extremetech.com/sitemap-arti...
- https://www.extremetech.com/sitemap-imag...
- https://www.extremetech.com/sitemap-cate...
- https://www.extremetech.com/sitemap-tags...
- https://www.extremetech.com/sitemap-misc...
- https://www.extremetech.com/sitemap-arti...
- https://www.extremetech.com/sitemap-imag...
- https://www.extremetech.com/sitemap-tags...
- https://www.extremetech.com/sitemap-arti...
- https://www.extremetech.com/sitemap-imag...
- https://www.extremetech.com/sitemap-tags...
- https://www.extremetech.com/sitemap-arti...
- https://www.extremetech.com/sitemap-imag...
- https://www.extremetech.com/sitemap-tags...
- https://www.extremetech.com/sitemap-arti...
- https://www.extremetech.com/sitemap-imag...
- https://www.extremetech.com/sitemap-tags...
- https://www.extremetech.com/sitemap-arti...
- https://www.extremetech.com/sitemap-imag...
- https://www.extremetech.com/sitemap-tags...
- https://www.extremetech.com/sitemap-imag...
A+Domain Intelligenceextremetech.com — via CSC Corporate Domains, Inc., 26 years, 3 months old, hosted on CloudflarePASS
739 days
July 26, 2028
75 days
Issued by Google Trust Services
26 years, 3 months
Registered May 8, 2000
Not enabled
Protects against DNS spoofing
Cloudflare
ASN AS13335
172.64.147.192
CSC Corporate Domains, Inc.
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.
Learn more ▾ ▴
DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.
Source: ICANN / RFC 4033
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.
Learn more ▾ ▴
Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.
Source: ICANN / domain-security best practice