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https://Metafilter.com

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
90
GRADE
A
FIX
0
REVIEW
8
PASS
9
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
17
9 PASS 8 REVIEW
B
DNSSEC
Unsigned (DNSSEC not deployed)
REVIEW
Unsigned (DNSSEC not deployed)
Info::
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)
Info::
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.
C
Reverse DNS
Action
0/6 IPs match cert SAN
REVIEW
0/6 IPs match cert SAN
Info::
PTR lookup failed for 104.26.7.211: lookup 104.26.7.211: 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.
Info::
PTR lookup failed for 104.26.6.211: lookup 104.26.6.211: 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.
Info::
PTR lookup failed for 172.67.73.55: lookup 172.67.73.55: 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.
Info::
PTR lookup failed for 2606:4700:20::681a:7d3: lookup 2606:4700:20::681a:7d3: 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.
Info::
PTR lookup failed for 2606:4700:20::681a:6d3: lookup 2606:4700:20::681a:6d3: 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.
Info::
PTR lookup failed for 2606:4700:20::ac43:4937: lookup 2606:4700:20::ac43:4937: 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.
B
Crawlability
robots.txt present, no sitemap
REVIEW
robots.txt present, no sitemap
Info::
robots.txt is present
Got: 1738 bytes
Info::
No sitemap.xml found
A sitemap helps search engines discover and index your pages more efficiently.
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

A sitemap helps search engines discover and index your pages more efficiently.

Why this matters

No sitemap.xml — Google relies on crawl-graph discovery alone, slowing indexing of deep or fresh URLs.

Learn more

A sitemap accelerates Google's discovery of new and updated content. Most CMSes auto-generate one; static-site frameworks need a build-step plugin. Reference it from robots.txt and submit in Search Console to confirm Google can fetch it.

Source: sitemaps.org / Google Search Central

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK
Size 1738 B Sitemaps referenced 0 User-agents CCBot, ClaudeBot, CloudflareBrowserRenderingCrawler, Google-Extended, Applebot-Extended, Bytespider, GPTBot, meta-externalagent, *, Amazonbot Blocking No — crawling allowed
# As a condition of accessing this website, you agree to abide by the following
# content signals:

# (a)  If a Content-Signal = yes, you may collect content for the corresponding
#      use.
# (b)  If a Content-Signal = no, you may not collect content for the
#      corresponding use.
# (c)  If the website operator does not include a Content-Signal for a
#      corresponding use, the website operator neither grants nor restricts
#      permission via Content-Signal with respect to the corresponding use.

# The content signals and their meanings are:

# search:   building a search index and providing search results (e.g., returning
#           hyperlinks and short excerpts from your website's contents). Search does not
#           include providing AI-generated search summaries.
# ai-input: inputting content into one or more AI models (e.g., retrieval
#           augmented generation, grounding, or other real-time taking of content for
#           generative AI search answers).
# ai-train: training or fine-tuning AI models.

# ANY RESTRICTIONS EXPRESSED VIA CONTENT SIGNALS ARE EXPRESS RESERVATIONS OF
# RIGHTS UNDER ARTICLE 4 OF THE EUROPEAN UNION DIRECTIVE 2019/790 ON COPYRIGHT
# AND RELATED RIGHTS IN THE DIGITAL SINGLE MARKET.

# BEGIN Cloudflare Managed content

User-agent: *
Content-Signal: search=yes,ai-train=no
Allow: /

User-agent: Amazonbot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Bytespider
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: CloudflareBrowserRenderingCrawler
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: meta-externalagent
Disallow: /

# END Cloudflare Managed Content


sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

B
TLS Certificate Expiry & Recommendations
75 days until leaf cert expires — 2 issues to address
REVIEW

Certificate validity

75
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
B
CDN & Delivery
Cloudflare
REVIEW
Cloudflare
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9f993e8eb8cf48d2-CDG
CDN Detected: Cloudflare
Provider Cloudflare Evidence cf-ray: 9f993e8eb8cf48d2-CDG
B
CDN Cache Observability
No CDN cache-status headers in the response
REVIEW
No CDN cache-status headers in the response
Info::
No CDN cache-status headers in the response
Without an X-Cache / CF-Cache-Status / X-Vercel-Cache / Age header, you can't tell from outside whether a request hit the cache or went to origin. Operationally important: enables debugging stale-content reports and verifying cache rules. Most managed CDN platforms emit at least one of these by default; absence often means the platform's diagnostic headers are stripped at an upstream proxy.
B
Operational Status Page
No status page link detected
REVIEW
No status page link detected
Info::
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
3 A records, 52 ms lookup
PASS
3 A records, 52 ms lookup
Info::
Resolves to 3 IPv4 address(es)
Got: 104.26.7.211, 104.26.6.211, 172.67.73.55
Info::
Has 3 IPv6 (AAAA) record(s)
Got: 2606:4700:20::681a:7d3, 2606:4700:20::681a:6d3, 2606:4700:20::ac43:4937
Info::
2 nameserver(s) configured
Got: tanner.ns.cloudflare.com, alice.ns.cloudflare.com
Info::
5 mail exchanger(s) configured
Info::
SPF record present in TXT
Info::
DNS resolution time: 52 ms
Got: 52 ms
A104.26.7.211, 104.26.6.211, 172.67.73.55
AAAA2606:4700:20::681a:7d3, 2606:4700:20::681a:6d3, 2606:4700:20::ac43:4937
CNAME
NStanner.ns.cloudflare.com, alice.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
TXT
SPF v=spf1 ip4:54.186.220.77 ip4:34.222.87.189 include:_spf.google.com include:mefi....
CAALookup not available with standard resolver
Resolved in 52 ms
A+
Subdomain Takeover
No subdomain takeover risk detected
PASS
No subdomain takeover risk detected
Info::
No CNAME record present
A+
Multi-Resolver DNS Speed
Mean 17ms across 3 resolvers (spread 27ms)
PASS
Mean 17ms across 3 resolvers (spread 27ms)
Info::
Quad9: 3ms
Got: 3ms via 9.9.9.9:53
Info::
Cloudflare: 18ms
Got: 18ms via 1.1.1.1:53
Info::
Google: 30ms
Got: 30ms via 8.8.8.8:53
A
Redirect Chain
1 redirect(s), 147 ms total
PASS
1 redirect(s), 147 ms total
Info::
Single redirect
Got: https://Metafilter.com → https://www.metafilter.com/ (301)
Info::
WWW normalization redirect

https://Metafilter.com

57 ms · HTTP/1.1

301

https://www.metafilter.com/

89 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://Metafilter.com30157 msHTTP/1.1cloudflare
2https://www.metafilter.com/40389 msHTTP/1.1cloudflare

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2606:4700:20::681a:7d3, 2606:4700:20::681a:6d3, 2606:4700:20::ac43:4937
Got: 17 ms connect
IPv6 Ready
AAAA Records 2606:4700:20::681a:7d3, 2606:4700:20::681a:6d3, 2606:4700:20::ac43:4937 Connection Reachable (17 ms)
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

403https://www.Metafilter.com/
200https://Metafilter.com/

HTTP → HTTPS

301http://Metafilter.com/ https://metafilter.com/

Consistent

A+
Domain Intelligence
Metafilter.com — via Amazon Registrar, Inc., 27 years, 6 months old
PASS
Metafilter.com — via Amazon Registrar, Inc., 27 years, 6 months old
Info::
Domain registered until Mar 18, 2027 (10 months 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: Amazon Registrar, Inc.
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.
Domain expiry

306 days

March 18, 2027

SSL certificate

75 days

Issued by Google Trust Services

Domain age

27 years, 6 months

Registered March 18, 1999

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:20::681a:7d3

Registrar

Amazon Registrar, Inc.

Unlocked 2 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 Amazon Registrar, Inc.
Created March 18, 1999 (27 years, 6 months ago)
Expires March 18, 2027 (10 months)
Last Updated February 11, 2026
Name Servers alice.ns.cloudflare.com, tanner.ns.cloudflare.com
DNSSEC Not enabled
Hosting
IP Address 2606:4700:20::681a:7d3
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 109 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
51 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
17 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
22 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
109 ms
Total Time Total request time from DNS lookup through full response.
109 ms

Connection waterfall

DNS Lookup 51 ms TCP Connect 17 ms TLS Handshake 22 ms Server Processing 19 ms Content Transfer 0 ms
A+
Health Check Endpoint
Auth-protected health endpoint at https://Metafilter.com/health (HTTP 403)
PASS
Auth-protected health endpoint at https://Metafilter.com/health (HTTP 403)
Info::
Auth-protected health endpoint exposed at https://Metafilter.com/health
Got: https://Metafilter.com/health
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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