Infrastructure - https://tumblr.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

URL Variants

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

REVIEW

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

Both www and non-www versions serve content

Got: Both variants return 200 Expected: One variant 301-redirects to the other

HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.tumblr.com/

200https://tumblr.com/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://tumblr.com/ → https://tumblr.com/

Consistent

B

TLS Certificate Expiry & Recommendations

52 days until leaf cert expires — 3 issues to address

REVIEW

Certificate validity

52

days left

0d 30d 60d 90d+

Recommended actions

Submit your domain to hstspreload.org to be added to the Chrome preload list
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, 6 ms lookup

PASS

1 A records, 6 ms lookup

Resolves to 1 IPv4 address(es)

Got: 192.0.77.40

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

No IPv6 (AAAA) records

4 nameserver(s) configured

Got: ns3.tumblr.com, ns4.tumblr.com, ns1.tumblr.com, ns2.tumblr.com

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: 6 ms

Got: 6 ms

A	192.0.77.40
AAAA	—
CNAME	—
NS	ns3.tumblr.com, ns4.tumblr.com, ns1.tumblr.com, ns2.tumblr.com
MX	1 aspmx.l.google.com 5 alt1.aspmx.l.google.com 5 alt2.aspmx.l.google.com 10 aspmx2.googlemail.com 10 aspmx3.googlemail.com
TXT	dropbox-domain-verification=gsvpgz511vsp SPF v=spf1 include:_spf.google.com include:_spf.automattic.com include:sendgrid.net ... figma-domain-verification=a2e41510ac6b0c5745595c76770385bfd602709c6d04e80ef830c9... mailru-verification: c8b795f0ae1cbc3f 896862773-6204718 wtcg10h9bh0nrxglf6zc3p8mxy5t3mw9 google-site-verification=evUIJKvsT_rKVFCun0dPbCRHgQqDz1L3f36AjHyVuL4 docusign=89f952a7-e765-4f50-a3d7-9de3cd65cac4 f050f00fa3c941ea9ee3f76fc6562a11 yahoo-verification-key=+HOWRlDLIp3tUwSLvdfWrcKzs6tWS/LkZFYp8XGzC6k= google-site-verification=CnMcqJES0ObJWvPivA5DBJFXKOryg0I9rA5JPro-Sdc google-site-verification=p3225uNj2Zmz4RRSuvITsVPAlTsPcdN0JAm8QJ5sii4 atlassian-domain-verification=HLvi8VknRfLwuOZ7TmiaKM8GgOgai45SxxeWZddVaOBMgWielc... google-site-verification=juLeQVndZxEsqhKFQS09fSxOZ3d2Jx2BWZqaLXakugw google-site-verification=49CbL4sd1lOCXXoGx4wSFD87B5_Py3QGacMNlrWK4Tw
CAA	Lookup not available with standard resolver

Resolved in 6 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), 419 ms total

PASS

1 redirect(s), 419 ms total

Single redirect

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

WWW normalization redirect

https://tumblr.com

31 ms · HTTP/1.1

301

https://www.tumblr.com/

388 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://tumblr.com	301	31 ms	HTTP/1.1	nginx
2	https://www.tumblr.com/	200	388 ms	HTTP/1.1	nginx

See the visual redirect chain in the HTTP Probe tab →

A+

Crawlability

robots.txt present, sitemap with 3 URLs

PASS

robots.txt present, sitemap with 3 URLs

robots.txt is present

Got: 3288 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 3 entries

Sitemap index with 3 child sitemaps

robots.txt references sitemap

robots.txt 200 OK

Size 3288 B Sitemaps referenced 1 User-agents ImagesiftBot, Slurp, FacebookBot, anthropic-ai, meta-externalagent, msnbot, *, sentibot, Googlebot, Yandex, omgili, Amazonbot, ClaudeBot, Applebot-Extended, TurnitinBot, CCBot, Google-Extended, omgilibot Blocking No — crawling allowed

Sitemap: https://www.tumblr.com/sitemap.xml

# Google Search Engine Robot
User-agent: Googlebot
Disallow: /radar
Disallow: /audio_file
Disallow: /video_file
Disallow: /dashboard
Disallow: /x
Disallow: /svc/account
Disallow: /dashboard/notes
Disallow: /customize
Disallow: /impixu
Disallow: /liked
Disallow: /search/*?before=*
Disallow: /search/*?language=*
Disallow: /tagged/*+*
Disallow: /tagged/*?before=*
Disallow: /tagged/*?language=*
Disallow: /open
Disallow: /link_to
Disallow: /sticky-ad-iframe.html
Disallow: /privacy/consent

# Yahoo! Search Engine Robot
User-agent: Slurp
Disallow: /radar
Disallow: /audio_file
Disallow: /video_file
Disallow: /dashboard
Disallow: /x
Disallow: /svc/account
Disallow: /dashboard/notes
Disallow: /customize
Disallow: /impixu
Disallow: /liked
Disallow: /search/*?before=*
Disallow: /search/*?language=*
Disallow: /tagged/*+*
Disallow: /tagged/*?before=*
Disallow: /tagged/*?language=*
Disallow: /open
Disallow: /link_to
Disallow: /sticky-ad-iframe.html
Disallow: /privacy/consent

# Yandex Search Engine Robot
User-agent: Yandex
Disallow: /radar
Disallow: /audio_file
Disallow: /video_file
Disallow: /dashboard
Disallow: /x
Disallow: /svc/account
Disallow: /dashboard/notes
Disallow: /customize
Disallow: /impixu
Disallow: /liked
Disallow: /search/*?before=*
Disallow: /search/*?language=*
Disallow: /tagged/*+*
Disallow: /tagged/*?before=*
Disallow: /tagged/*?language=*
Disallow: /open
Disallow: /link_to
Disallow: /sticky-ad-iframe.html
Disallow: /privacy/consent

# Microsoft Search Engine Robot
User-agent: msnbot
Disallow: /radar
Disallow: /audio_file
Disallow: /video_file
Disallow: /dashboard
Disallow: /x
Disallow: /svc/account
Disallow: /dashboard/notes
Disallow: /customize
Disallow: /impixu
Disallow: /liked
Disallow: /search/*?before=*
Disallow: /search/*?language=*
Disallow: /tagged/*+*
Disallow: /tagged/*?before=*
Disallow: /tagged/*?language=*
Disallow: /open
Disallow: /link_to
Disallow: /sticky-ad-iframe.html
Disallow: /privacy/consent

# Every bot that might possibly read and respect this file.
User-agent: *
Disallow: /radar
Disallow: /audio_file
Disallow: /video_file
Disallow: /dashboard
Disallow: /x
Disallow: /svc/account
Disallow: /dashboard/notes
Disallow: /customize
Disallow: /impixu
Disallow: /liked
Disallow: /search/*?before=*
Disallow: /search/*?language=*
Disallow: /tagged/*+*
Disallow: /tagged/*?before=*
Disallow: /tagged/*?language=*
Disallow: /open
Disallow: /link_to
Disallow: /sticky-ad-iframe.html
Disallow: /privacy/consent
Crawl-delay: 1

# Common Crawl's crawler
User-agent: CCBot
Disallow: /

# SentiBot's crawler
User-agent: sentibot
Disallow: /

# Google Bard's crawler
User-agent: Google-Extended
Disallow: /

# Facebook's crawler
User-agent: FacebookBot
Disallow: /

# webz.io's crawler
User-agent: omgili
Disallow: /

# webz.io's crawler
User-agent: omgilibot
Disallow: /

# Amazon's crawler
User-agent: Amazonbot
Disallow: /

# ClaudeBot's crawler
User-agent: ClaudeBot
Disallow: /

# anthropic-ai's crawler
User-agent: anthropic-ai
Disallow: /

# ImageSift's AI crawler
User-agent: ImagesiftBot
Disallow: /

# Apple's AI crawler
User-agent: Applebot-Extended
Disallow: /

# TurnitinBot crawler
User-agent: TurnitinBot
Disallow: /

# Meta AI crawler
User-agent: meta-externalagent
Disallow: /

sitemap.xml 200 OK

Type Sitemap Index URLs 3 entries Valid XML Yes

Child Sitemaps:

A+

Domain Intelligence

tumblr.com — via MarkMonitor Inc., 20 years, 1 months old, hosted on WordPress.com (Automattic)

PASS

tumblr.com — via MarkMonitor Inc., 20 years, 1 months old, hosted on WordPress.com (Automattic)

Domain registered until Jun 8, 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: MarkMonitor Inc.

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: WordPress.com (Automattic)

Got: AS2635

Domain expiry

330 days

June 8, 2027

SSL certificate

52 days

Issued by Let's Encrypt

Domain age

20 years, 1 months

Registered June 8, 2006

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

WordPress.com (Automattic)

ASN AS2635

192.0.77.40

Registrar

MarkMonitor Inc.

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 MarkMonitor Inc.

Created June 8, 2006 (20 years, 1 months ago)

Expires June 8, 2027 (1 years, 1 months)

Last Updated May 7, 2025

Name Servers ns1.tumblr.com, ns2.tumblr.com, ns3.tumblr.com, ns4.tumblr.com

DNSSEC Not enabled

Hosting

IP Address 192.0.77.40

ASN AS2635 (AUTOMATTIC - Automattic, Inc, US)

Provider WordPress.com (Automattic)

Data source: rdap (0.1s)

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 28 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

3 ms

TCP Connect

1 ms

TLS Handshake

3 ms

Time to First Byte

29 ms

Total Time

29 ms

Connection waterfall

DNS Lookup 3 ms TCP Connect 1 ms TLS Handshake 3 ms Server Processing 22 ms Content Transfer 0 ms