Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BTLS Certificate Expiry & Recommendations39 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
A+DNS Records1 A records, 41 ms lookupPASS
| A | 34.169.83.167 |
| AAAA | — |
| CNAME | — |
| NS | a20-66.akam.net, a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a4-64.akam.net, a3-67.akam.net |
| MX | 1 aspmx.l.google.com 5 alt2.aspmx.l.google.com 5 alt1.aspmx.l.google.com 10 aspmx2.googlemail.com 10 aspmx3.googlemail.com |
| TXT | google-site-verification=AqP_FUfb8qzn0V4j1cQ-zvrzwYmLD4CNZR6Z49TBCXw SPF v=spf1 include:_spf.google.com -all cdobt4pvidr3jtnu7nth96e664 8cde0g9maphvns9ihb1frehdos ms9geudeq4lcgiv638susjfjht 8vnaab08160s9fqkrn7v8l3qmd |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.
Learn more ▾ ▴
Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.
Source: SRE practice / DNS architecture
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), 704 ms totalPASS
https://ora.com
484 ms · HTTP/1.1
https://www.oreilly.com/
219 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://ora.com | 301 | 484 ms | HTTP/1.1 | Apache |
| 2 | https://www.oreilly.com/ | 200 | 219 ms | HTTP/1.1 | Apache |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 5 URLsPASS
User-agent: *
Disallow: /images/
Disallow: /graphics/
Disallow: /admin/
Disallow: /promos/
Disallow: /ddp/
Disallow: /dpp/
Disallow: /programming/free/files/
Disallow: /design/free/files/
Disallow: /iot/free/files/
Disallow: /data/free/files/
Disallow: /webops-perf/free/files/
Disallow: /web-platform/free/files/
Disallow: /cs/
Disallow: /test/
Disallow: /*/?ar
Disallow: /*/?orpq
Disallow: /*/?discount=learn
Disallow: /self-registration/*
User-agent: Baiduspider
User-agent: PetalBot
User-agent: yisouspider
User-agent: 008
Disallow: /
# Attribution bots - allow full access
User-agent: ChatGPT-User
User-agent: ChatGPT-User/2.0
User-agent: PerplexityBot
User-agent: Perplexity-User
User-agent: DuckAssistBot
User-agent: Applebot
User-agent: bingbot
User-agent: Googlebot
Allow: /
# Conditional - allow access, review quarterly
User-agent: ClaudeBot
User-agent: claude-web
User-agent: Claude-SearchBot
User-agent: YouBot
User-agent: Applebot-Extended
User-agent: MistralAI-User
User-agent: meta-webindexer
User-agent: GoogleAgent-Mariner
User-agent: DotBot
User-agent: archive.org_bot
User-agent: Pinterestbot
User-agent: TelegramBot
User-agent: kakaotalk-scrap
User-agent: getstream.io/opengraph-bot
User-agent: RamblerMail
User-agent: Brave
Allow: /
# AI training scrapers - no content access
User-agent: GPTBot
User-agent: anthropic-ai
User-agent: Google-Extended
User-agent: cohere-ai
User-agent: CCBot
User-agent: AI2Bot
User-agent: OAI-SearchBot
User-agent: Amazonbot
User-agent: Amazonbot-Video
User-agent: Bytespider
User-agent: meta-externalagent
User-agent: Diffbot
User-agent: omgili
User-agent: TimpiBot
User-agent: SeznamBot
User-agent: Exabot
User-agent: YandexBot
User-agent: Sogou
User-agent: 360Spider
User-agent: YisouSpider
User-agent: Baiduspider-Render/2.0
User-agent: MJ12bot
User-agent: DataForSeoBot
User-agent: AliyunSecBot
User-agent: ArchiveTeam
User-agent: ArchiveTeam ArchiveBot
User-agent: AwarioBot
User-agent: ZoominfoBot
User-agent: ali-implementer
User-agent: Blueno
User-agent: BIGO-baiguoyuan
User-agent: WorksOgCrawler
User-agent: OnPageBot
User-agent: DoCoMo
User-agent: SAMSUNG-SGH-E250
User-agent: TA-Googlebot
Disallow: /
# Note: Conditional bots should be reviewed quarterly. If crawl behavior
# or attribution quality changes, move affected agents to the block list.
Sitemap: https://www.oreilly.com/sitemap_index.xml
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
ADomain Intelligenceora.com — via GoDaddy.com, LLC, 37 years, 4 months old, hosted on Google CloudPASS
EXPIRED
June 13, 2026
39 days
Issued by Let's Encrypt
37 years, 4 months
Registered June 14, 1989
Not enabled
Protects against DNS spoofing
Google Cloud
ASN AS396982
34.169.83.167
GoDaddy.com, LLC
Expiry timeline
Recommended actions
- Domain has EXPIRED — renew immediately to avoid total site outage
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Consider enabling auto-renewal to prevent accidental expiration.
Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.
Source: ICANN renewal policy
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