Infrastructure - https://alltaxbooks.com BeaverCheck Audit

F

IPv6 Readiness

Action

IPv6 records exist but unreachable

FIX

IPv6 records exist but unreachable

IPv6 DNS records exist but server is not reachable

Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.

Got: 2600:1f1e:7c1:c300::258

IPv6 connection error

Got: dial tcp6 [2600:1f1e:7c1:c300::258]:443: connect: no route to host

IPv6 Misconfigured

AAAA Records 2600:1f1e:7c1:c300::258 Connection UNREACHABLE

Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.

Why this matters

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)

B

DNSSEC

Unsigned (DNSSEC not deployed)

REVIEW

Unsigned (DNSSEC not deployed)

DNSSEC is not deployed

The zone is not DNSSEC-signed. Users on validating resolvers (Cloudflare 1.1.1.1, Quad9 9.9.9.9, growing default in mobile resolvers) get no protection against DNS spoofing for this domain. Most registrars now offer DNSSEC at a single click; consider enabling it for sites where authenticity matters (banking, healthcare, government).

B

CAA Records

No CAA records (any CA may issue certificates)

REVIEW

No CAA records (any CA may issue certificates)

No CAA records published

Without CAA records, any publicly-trusted CA can issue certificates for this domain. Adding a CAA record (`yourdomain. IN CAA 0 issue "letsencrypt.org"`) restricts issuance to CAs you authorize. Required by CAB Forum baseline since 2017; the default of 'any CA' is widely supported but is the broader attack surface for issuance fraud.

B

Reverse DNS

0/2 IPs match cert SAN

REVIEW

0/2 IPs match cert SAN

PTR for 54.232.119.62 does not match any cert SAN: ec2-54-232-119-62.sa-east-1.compute.amazonaws.com

Common when behind a CDN or shared hosting (PTR points at the provider's hostname). Mismatch can also affect mail deliverability if this IP sends email -- many MTAs reject mail when forward+reverse DNS disagree.

PTR lookup failed for 2600:1f1e:7c1:c300::258: lookup 2600:1f1e:7c1:c300::258: no such host

No reverse DNS record set for this IP. Common on bare cloud-VM IPs without provider-side PTR; not a security issue.

C

Multi-Resolver DNS Speed

Action

Mean 76ms across 3 resolvers (spread 207ms)

REVIEW

Mean 76ms across 3 resolvers (spread 207ms)

Cloudflare: 4ms

Got: 4ms via 1.1.1.1:53

Google: 14ms

Got: 14ms via 8.8.8.8:53

Quad9: 211ms

Got: 211ms via 9.9.9.9:53

High latency spread between resolvers: 207ms (min 4ms / max 211ms)

Wide gap between the fastest and slowest public resolver suggests a geographic anycast issue or an authoritative-server cache problem. Users in different regions will see materially different DNS times.

B

TLS Certificate Expiry & Recommendations

40 days until leaf cert expires — 3 issues to address

REVIEW

Certificate validity

40

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

B

Operational Status Page

No status page link detected

REVIEW

No status page link detected

No operational status page link detected

Status pages communicate planned maintenance and incidents to users -- a hallmark of operationally-mature services. Most SaaS teams publish one via Atlassian Statuspage, Instatus, BetterUptime, or a self-hosted Cachet. Smaller sites legitimately don't need one; flagged as Info, not a failure.

A+

DNS Records

1 A records, 12 ms lookup

PASS

1 A records, 12 ms lookup

Resolves to 1 IPv4 address(es)

Got: 54.232.119.62

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

Has 1 IPv6 (AAAA) record(s)

Got: 2600:1f1e:7c1:c300::258

4 nameserver(s) configured

Got: dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net

5 mail exchanger(s) configured

SPF record present in TXT

DNS resolution time: 12 ms

Got: 12 ms

A	54.232.119.62
AAAA	2600:1f1e:7c1:c300::258
CNAME	—
NS	dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net
MX	1 aspmx.l.google.com 5 alt1.aspmx.l.google.com 5 alt2.aspmx.l.google.com 10 alt4.aspmx.l.google.com 10 alt3.aspmx.l.google.com
TXT	SPF v=spf1 include:_spf.google.com -all apple-domain-verification=UOaocNejPQF9MNnj
CAA	Lookup not available with standard resolver

Resolved in 12 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

A+

Subdomain Takeover

No subdomain takeover risk detected

PASS

No subdomain takeover risk detected

No CNAME record present

A+

Redirect Chain

No redirects — direct access

PASS

No redirects — direct access

Got: https://alltaxbooks.com

https://alltaxbooks.com

289 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://alltaxbooks.com	200	289 ms	HTTP/1.1	Netlify

A+

Crawlability

robots.txt present, sitemap with 84 URLs

PASS

robots.txt present, sitemap with 84 URLs

robots.txt is present

Got: 3786 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 84 entries

robots.txt references sitemap

robots.txt 200 OK

Size 3786 B Sitemaps referenced 1 User-agents Googlebot, Bingbot, DuckDuckBot, Applebot, Applebot-Extended, GPTBot, ChatGPT-User, PerplexityBot, *, Google-Extended, OAI-SearchBot, ClaudeBot, CCBot, Bytespider Blocking No — crawling allowed

# All Tax & Books — public search/AI discovery policy
# Public pages are crawlable. Internal API routes are excluded.

User-agent: *
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Google Search
User-agent: Googlebot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Google Gemini / Vertex AI controls
User-agent: Google-Extended
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Microsoft Bing / Copilot ecosystem
User-agent: Bingbot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# DuckDuckGo
User-agent: DuckDuckBot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Apple Search / Siri / Spotlight / Safari
User-agent: Applebot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Apple generative-AI data-use control
User-agent: Applebot-Extended
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# OpenAI Search / ChatGPT Search
User-agent: OAI-SearchBot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# OpenAI model-training crawler
User-agent: GPTBot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# OpenAI user-triggered fetches
User-agent: ChatGPT-User
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Anthropic
User-agent: ClaudeBot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Perplexity
User-agent: PerplexityBot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# Common Crawl
User-agent: CCBot
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

# ByteDance
User-agent: Bytespider
Allow: /
Disallow: /api/
Disallow: /upload.html
Disallow: /es/upload.html
Disallow: /it/upload.html
Disallow: /sq/upload.html
Disallow: /upload/
Disallow: /es/upload/
Disallow: /it/upload/
Disallow: /sq/upload/

Sitemap: https://alltaxbooks.com/sitemap.xml

sitemap.xml 200 OK

Type URL Set URLs 84 entries Valid XML Yes

Sample URLs:

A+

URL Variants

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

PASS

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

www/non-www redirect configured correctly (preferred: non-www)

HTTP correctly redirects to HTTPS permanently

Got: HTTP 301

www / non-www

301https://www.alltaxbooks.com/

200https://alltaxbooks.com/

Preferred variant: non-www

HTTP → HTTPS

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

Consistent

A+

Domain Intelligence

alltaxbooks.com — via Porkbun LLC, 6 months old

PASS

alltaxbooks.com — via Porkbun LLC, 6 months old

Domain registered until Mar 23, 2027 (5 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: Porkbun 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.

Domain expiry

155 days

March 23, 2027

SSL certificate

40 days

Issued by Let's Encrypt

Domain age

6 months

Registered March 23, 2026

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2600:1f1e:7c1:c300::258

Registrar

Porkbun 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 Porkbun LLC

Created March 23, 2026 (6 months ago)

Expires March 23, 2027 (5 months)

Last Updated June 22, 2026

Name Servers dns1.p03.nsone.net, dns2.p03.nsone.net, dns3.p03.nsone.net, dns4.p03.nsone.net

DNSSEC Not enabled

Hosting

IP Address 2600:1f1e:7c1:c300::258

Data source: rdap (0.4s)

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

PASS

DNS Lookup

11 ms

TCP Connect

2 ms

TLS Handshake

145 ms

Time to First Byte

513 ms

Total Time

636 ms

Connection waterfall

DNS Lookup 11 ms TCP Connect 2 ms TLS Handshake 145 ms Server Processing 355 ms Content Transfer 123 ms

A

CDN & Delivery

Netlify ("Netlify Edge"; fwd=miss; fwd-status=200; stored)

PASS

Netlify ("Netlify Edge"; fwd=miss; fwd-status=200; stored)

Document is served via Netlify CDN

Got: x-nf-request-id: 01M4JEAM2V810EZV5BCFPVFQQ2

CDN cache status: "Netlify Edge"; fwd=miss; fwd-status=200; stored

Document served via CDN: Netlify

Provider Netlify Cache Status "Netlify Edge"; fwd=miss; fwd-status=200; stored Evidence x-nf-request-id: 01M4JEAM2V810EZV5BCFPVFQQ2

A+

CDN Cache Observability

Cache state: fresh (Age=0)

PASS

Cache state: fresh (Age=0)

CDN cache state observable via 1 header(s)

Got: age=0

A+

Health Check Endpoint

Health endpoint at https://alltaxbooks.com/health (HTTP 200)

PASS

Health endpoint at https://alltaxbooks.com/health (HTTP 200)

Public health endpoint at https://alltaxbooks.com/health

Got: https://alltaxbooks.com/health