Infrastructure - https://oreilly.com BeaverCheck Audit

D

CDN & Delivery

Action

No CDN detected

FIX

No CDN detected

A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

C

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

No IPv6 (AAAA) records found

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

No IPv6 Support

About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B

TLS Certificate Expiry & Recommendations

88 days until leaf cert expires — 3 issues to address

REVIEW

Certificate validity

88

days left

0d 30d 60d 90d+

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 Records

1 A records, 101 ms lookup

PASS

1 A records, 101 ms lookup

Resolves to 1 IPv4 address(es)

Got: 34.169.83.167

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

No IPv6 (AAAA) records

6 nameserver(s) configured

Got: a13-64.akam.net, a3-67.akam.net, a20-66.akam.net, a1-225.akam.net, a4-64.akam.net, a16-65.akam.net

5 mail exchanger(s) configured

CAA records not checked

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

SPF record present in TXT

DNS resolution time: 101 ms

Got: 101 ms

A	34.169.83.167
AAAA	—
CNAME	—
NS	a13-64.akam.net, a3-67.akam.net, a20-66.akam.net, a1-225.akam.net, a4-64.akam.net, a16-65.akam.net
MX	1 aspmx.l.google.com 5 alt1.aspmx.l.google.com 5 alt2.aspmx.l.google.com 10 aspmx3.googlemail.com 10 aspmx2.googlemail.com
TXT	oci-domain-verification=mwjZ7A40UhcYmctnsvlpDQ4zebV3j9jVCIAqGBSkx globalsign-domain-verification=aei6eSS-1p0PqmZ3x4jXFoJt_7l6MenGY6u2FV45qG openai-domain-verification=dv-p9JzdykFvVDoSGxyY4Y6Y143 SPF v=spf1 include:_spf.google.com include:amazonses.com include:spf.mandrillapp.com... logmein-verification-code=35fc191f-9043-4216-8bf4-88a05c9e8768 calendly-site-verification=KRdabjWvHMSpj0d7HZ7WgAZXIGkbywfZWqJCGrIYd MS=ms43057904 google-site-verification=0QeIVzKsJaBLMuz3ZQ1rVpVCmumDKYRlvZ8fRExJ81Y openai-domain-verification=dv-ZU9jzgezaEHhPW3jhinsYiGi onetrust-domain-verification=ae63e0829f794f8eaa9d46794a8e6073 smartsheet-site-validation=fxm70bCfI2yjd4sAuYUP7eTOck334VGo airtable-verification=1f9f5306621f76be14eb5cde11661c2d BlueXPf24d34d4-6c8c-4419-b3be-53abc864b788 ZOOM_verify_t_KNmIKiQZKkyVMeJxpjnA zapier-domain-verification-challenge=6257ac03-13a2-49f0-bf05-cff1cac20573 rzp-site-verification=a854b4a8b6cd7bfd0c5ebe4edcf00c18 _figma_sites_verify_customersuccess OczFEA1OJs6vDuh7lvXFAcHDrCMg0Bgq35GaGBcrZqs pardot1009792=4c05d6fbc27aa34baa25bd9d175c4f3be8941b4c77ce5fba6e78022fdfe194fb stripe-verification=FA0A5DF1B861B5632D3B866D38C3327CB0C01D0591C3FAE956610D4BC68D... cloudhealth=45f9c4a4-d1eb-4252-b4a1-7d7bb9004040 1password-site-verification=YL4MABUTMFAGTAOZTL6TFWZWBU sophos-domain-verification=2ec763c10efd73f2c1dbceaad2983ea0093f02a5882445675f088... anthropic-domain-verification-dnrkbn=q9EUze0gStRgj4wmYfJUGB6V2 MS=ms79198677 1g9d3pyyw5xdhpty461591rx8qtp6y6z stripe-verification=f9c7baf61f54571ffe67b1c557dea5380c1afd51153b97ca71724438405f... google-site-verification=neBJBV38v3xXAew00QEe1whxoBx-y0oo0-9840fBTek docker-verification=993bde06-01c2-4c04-a1c6-d840bddb0611 onetrust-domain-verification=54ccc7392b084e48acfcbc164e2a0ba6 m7zd1crqvftqsgdf8v889l9zdqhk3p07 _c5xkp6qqlmxx3yajtdb4hqhz82rsazn _yikoj59erdx9jd4sti8idhii7nvf9x2 d7kfp9gbnkkvp5vvphuv80s4oc apple-domain-verification=CObFhoTOkqx87oIs adobe-idp-site-verification=ad56f341-bb17-4470-8efa-9a9b9c121a4a MS=E75517AC6D8C7C76D0C87E3CF6ABD5F68B91610C
CAA	Lookup not available with standard resolver

Resolved in 101 ms

Multiple A records provide failover if one server goes down.

Why this matters

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.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A

Redirect Chain

1 redirect(s), 584 ms total

PASS

1 redirect(s), 584 ms total

Single redirect

Got: https://oreilly.com → https://www.oreilly.com/ (301)

WWW normalization redirect

Redirect overhead: 584 ms total

Got: 584 ms

https://oreilly.com

482 ms · HTTP/1.1

301

https://www.oreilly.com/

102 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://oreilly.com	301	482 ms	HTTP/1.1	Apache
2	https://www.oreilly.com/	200	102 ms	HTTP/1.1	Apache

See the visual redirect chain in the HTTP Probe tab →

A+

Crawlability

robots.txt present, sitemap with 5 URLs

PASS

robots.txt present, sitemap with 5 URLs

robots.txt is present

Got: 2373 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 5 entries

Sitemap index with 5 child sitemaps

robots.txt references sitemap

robots.txt 200 OK

Size 2373 B Sitemaps referenced 1 User-agents PetalBot, yisouspider, claude-web, Pinterestbot, cohere-ai, Baiduspider, ChatGPT-User/2.0, DotBot, archive.org_bot, GPTBot, TimpiBot, ArchiveTeam ArchiveBot, OnPageBot, Applebot, kakaotalk-scrap, AI2Bot, Baiduspider-Render/2.0, DataForSeoBot, AliyunSecBot, DoCoMo, DuckAssistBot, TelegramBot, Amazonbot-Video, Exabot, Amazonbot, YisouSpider, Googlebot, Applebot-Extended, meta-webindexer, CCBot, ChatGPT-User, bingbot, Brave, AwarioBot, ali-implementer, Perplexity-User, Blueno, WorksOgCrawler, TA-Googlebot, SAMSUNG-SGH-E250, PerplexityBot, getstream.io/opengraph-bot, SeznamBot, 008, ClaudeBot, Claude-SearchBot, *, GoogleAgent-Mariner, MJ12bot, 360Spider, MistralAI-User, RamblerMail, anthropic-ai, OAI-SearchBot, Bytespider, YandexBot, ZoominfoBot, YouBot, Google-Extended, omgili, ArchiveTeam, BIGO-baiguoyuan, meta-externalagent, Diffbot, Sogou Blocking No — crawling allowed

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

sitemap.xml 200 OK

Type Sitemap Index URLs 5 entries Valid XML Yes

Child Sitemaps:

A+

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

PASS

www/non-www, trailing slash, HTTP→HTTPS

HTTP correctly 301-redirects to HTTPS

www / non-www

403https://www.oreilly.com/

200https://oreilly.com/

HTTP → HTTPS

301http://oreilly.com/ → https://www.oreilly.com/

Consistent

A+

Domain Intelligence

oreilly.com — via GoDaddy.com, LLC, 29 years, 3 months old, hosted on Google Cloud

PASS

oreilly.com — via GoDaddy.com, LLC, 29 years, 3 months old, hosted on Google Cloud

Domain registered until May 26, 2027 (1 years, 1 months remaining)

DNSSEC is not enabled

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Registrar: GoDaddy.com, LLC

Registrar lock is NOT enabled

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.

Hosting: Google Cloud

Got: AS396982

Domain expiry

344 days

May 26, 2027

SSL certificate

88 days

Issued by Let's Encrypt

Domain age

29 years, 3 months

Registered May 27, 1997

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Google Cloud

ASN AS396982

34.169.83.167

Registrar

GoDaddy.com, LLC

Unlocked 6 NS records

Expiry timeline

Today

+1 year

Domain expiry SSL expiry Danger zone (≤30 days)

Recommended actions

Enable DNSSEC to protect visitors from DNS spoofing
Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers

Registrar GoDaddy.com, LLC

Created May 27, 1997 (29 years, 3 months ago)

Expires May 26, 2027 (1 years, 1 months)

Last Updated April 16, 2026

Name Servers a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net, a3-67.akam.net, a4-64.akam.net

DNSSEC Not enabled

Hosting

IP Address 34.169.83.167

ASN AS396982 (GOOGLE-CLOUD-PLATFORM - Google LLC, US)

Provider Google Cloud

Data source: rdap (0.3s)

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

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.

Why this matters

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

A

HTTP Probe Timing

Total 520 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

27 ms

TCP Connect

164 ms

TLS Handshake

166 ms

Time to First Byte

521 ms

Total Time

521 ms

Connection waterfall

DNS Lookup 27 ms TCP Connect 164 ms TLS Handshake 166 ms Server Processing 164 ms Content Transfer 0 ms