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https://blurb.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
86
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Santa Clara, United States
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
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
Info::
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
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
HTTP version does not redirect to HTTPS
Got: HTTP 429 Expected: 301 redirect to HTTPS

www / non-www

https://www.blurb.com/
200https://blurb.com/

HTTP → HTTPS

429http://blurb.com/

HTTP version does not redirect to HTTPS

B
TLS Certificate Expiry & Recommendations
131 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

131
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • 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, 35 ms lookup
PASS
1 A records, 35 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 67.226.216.15
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-1213.awsdns-23.org, ns-1933.awsdns-49.co.uk, ns-58.awsdns-07.com, ns-707.awsdns-24.net
Info::
1 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 35 ms
Got: 35 ms
A67.226.216.15
AAAA—
CNAME—
NSns-1213.awsdns-23.org, ns-1933.awsdns-49.co.uk, ns-58.awsdns-07.com, ns-707.awsdns-24.net
MX
0 blurb-com.mail.protection.outlook.com
TXT
MS=ms80906568
_globalsign-domain-verification=2wRqY6IrIINLY7B8Qcp-qur9HsiRTO04g4gwsMmFy3
bcn=B2BE3EE2-7048-11EF-99FD-C0D429F9B7DF
detectify-verification=890d5e59b8211cf43e2df8c6ea4d944c
google-site-verification=emH8I2akIku0wpO1UafaYBrRsPoXisuuvQTVwtskzAk
google-site-verification=l0FAvS-seZU2dnG5j17ZBXzFLqvQQULQk3INn9qLeFE
lucid-verification=nqm@fyv3mht6ugr3EJM
SPF v=spf1 ip4:69.25.104.64/26 ip4:66.150.244.128/26 ip4:64.30.155.0/24 include:spf....
CAALookup not available with standard resolver
Resolved in 35 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), 275 ms total
PASS
1 redirect(s), 275 ms total
Info::
Single redirect
Got: https://blurb.com → https://www.blurb.com/ (301)
Info::
WWW normalization redirect

https://blurb.com

124 ms · HTTP/1.1

301

https://www.blurb.com/

151 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://blurb.com301124 msHTTP/1.1nginx
2https://www.blurb.com/200151 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 1 URLs
PASS
robots.txt present, sitemap with 1 URLs
Info::
robots.txt is present
Got: 5395 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 1 entries
Info::
Sitemap index with 1 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 5395 B Sitemaps referenced 1 User-agents GnowitNewsbot, baiduspider, Googlebot, *, DigExt, heritrix/3.3.0, SEOkicks-Robot, centurybot9@gmail.com, test bot, BUbiNG, msnbot, metadataparser, MegaIndex, ~crawler, yacybot, Bingbot, Slurp, s~snapchat-proxy, Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt; DTS Agent, istellabot, Yandex, heritrix, G-i-g-a-b-o-t, Naverbot, DTS Agent, The Knowledge AI, id-search, Wotbox, seoscanners, OpenLinkProfiler, YisouSpider, PaperLiBot, Applebot, Twitterbot, CRAZYWEBCRAWLER, ZumBot Blocking No — crawling allowed
# This file is served https://www.blurb.com/robots.txt
Sitemap: https://www.blurb.com/sitemap-index.xml

User-agent: DigExt
Disallow: /

User-agent: DTS Agent
Disallow: /

User-agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt; DTS Agent
Disallow: /

User-agent: The Knowledge AI
Disallow: /

User-agent: heritrix
Disallow: /

User-agent: heritrix/3.3.0
Disallow: /

User-agent: CRAZYWEBCRAWLER
Disallow: /

User-agent: metadataparser
Disallow: /

User-agent: seoscanners
Disallow: /

User-agent: SEOkicks-Robot
Disallow: /

User-agent: OpenLinkProfiler
Disallow: /

User-agent: MegaIndex
Disallow: /

User-agent: id-search
Disallow: /

User-agent: istellabot
Disallow: /
User-agent: centurybot9@gmail.com
Disallow: /

User-agent: ~crawler
Disallow: /

User-agent: test bot
Disallow: /

User-agent: ZumBot
Disallow: /

User-agent: Wotbox
Disallow: /

User-agent: YisouSpider
Disallow: /

User-agent: G-i-g-a-b-o-t
Disallow: /

User-agent: yacybot
Disallow: /

User-agent: s~snapchat-proxy
Disallow: /

User-agent: GnowitNewsbot
Disallow: /

User-agent: PaperLiBot
Disallow: /

User-agent: BUbiNG
Disallow: /

User-agent: Applebot
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Allow: /tags/*

User-agent: baiduspider
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Allow: /tags/*

User-agent: Bingbot
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Allow: /tags/*

User-agent: Googlebot
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Allow: /tags/*

User-agent: msnbot
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Allow: /tags/*

User-agent: Naverbot
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Allow: /tags/*

User-agent: Twitterbot
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /user/
Noindex: /user/
Allow: /tags/*

User-agent: Yandex
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Allow: /tags/*

User-agent: Slurp
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Disallow: /user/
Noindex: /user/
Allow: /tags/*

User-agent: *
crawl-delay: 10
Disallow: /my/
Disallow: /admin/
Disallow: /status/
Disallow: /feeds/search*
Disallow: /bookstore/search*
Disallow: /*.swf$
Disallow: /bookshow/cache/
Disallow: /feeds/user*
Disallow: /ebooks/editor.html
Disallow: /ebooks/reader.html
Disallow: /ebook-creator/editor.html
Disallow: /node/*
Disallow: /bookstore/invited/*
Disallow: /distribution/*
Disallow: /search/*
Disallow: /de/ 
Disallow: /en/
Disallow: /en-au/ 
Disallow: /en-ca/ 
Disallow: /en-gb/ 
Disallow: /es/ 
Disallow: /es-us/ 
Disallow: /fr/ 
Disallow: /fr-ca/ 
Disallow: /it/ 
Disallow: /nl/ 
Disallow: /pt/ 
Disallow: /website-v2-test/
sitemap.xml 200 OK
Type Sitemap Index URLs 1 entries Valid XML Yes
Child Sitemaps:
A+
Domain Intelligence
blurb.com — via eNom, LLC, 28 years, 5 months old, hosted on PDX - Blurb, Inc., US
PASS
blurb.com — via eNom, LLC, 28 years, 5 months old, hosted on PDX - Blurb, Inc., US
Info::
Domain registered until Mar 25, 2032 (6 years remaining)
Info::
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.
Info::
Registrar: eNom, LLC
Warning::
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.
Info::
Hosting: PDX - Blurb, Inc., US
Got: AS399482
Domain expiry

2077 days

March 25, 2032

SSL certificate

131 days

Issued by DigiCert Inc

Domain age

28 years, 5 months

Registered March 26, 1998

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

PDX - Blurb, Inc., US

ASN AS399482

67.226.216.15

Registrar

eNom, LLC

Unlocked 4 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 eNom, LLC
Created March 26, 1998 (28 years, 5 months ago)
Expires March 25, 2032 (6 years)
Last Updated March 25, 2022
Name Servers ns-1213.awsdns-23.org, ns-1933.awsdns-49.co.uk, ns-58.awsdns-07.com, ns-707.awsdns-24.net
DNSSEC Not enabled
Hosting
IP Address 67.226.216.15
ASN AS399482 (PDX - Blurb, Inc., US)
Provider PDX - Blurb, Inc., US
Data source: rdap (0.2s)

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 104 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
34 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
16 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
33 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
104 ms
Total Time Total request time from DNS lookup through full response.
104 ms

Connection waterfall

DNS Lookup 34 ms TCP Connect 16 ms TLS Handshake 33 ms Server Processing 21 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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