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https://e621.net

Infrastructure

· 17 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
6
PASS
11
INFO
0
Probed from Madrid, Spain
200 OK
Checks
17
11 PASS 6 REVIEW
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
0/4 IPs match cert SAN
REVIEW
0/4 IPs match cert SAN
Info::
PTR lookup failed for 172.66.160.235: lookup 172.66.160.235: 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 104.20.31.112: lookup 104.20.31.112: 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 2606:4700:10::ac42:a0eb: lookup 2606:4700:10::ac42:a0eb: 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 2606:4700:10::6814:1f70: lookup 2606:4700:10::6814:1f70: 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: 2366 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 2366 B Sitemaps referenced 0 User-agents Yandex, magpie-crawler, AhrefsBot, MJ12bot, HTTrack, Slurp, Baiduspider, SemrushBot, SemrushBot-SA, *, dotbot, coccocbot-web, BLEXBot Blocking No — crawling allowed
User-agent: *
Crawl-delay: 1
Disallow: /admin
Disallow: /advertisements
Disallow: /artists
Disallow: /artist_commentaries
Disallow: /artist_commentary_versions
Disallow: /artist_versions
Disallow: /avoid_postings
Disallow: /avoid_posting_versions
Disallow: /bans
Disallow: /comment_votes
Disallow: /comment/
Disallow: /comments
Disallow: /comments.atom
Disallow: /comments/*.atom
Disallow: /counts
Disallow: /data/
Disallow: /delayed_jobs
Disallow: /deleted_posts
Disallow: /dmails
Disallow: /explore
Disallow: /favorite
Disallow: /forum_topics.atom
Disallow: /forum_posts
Disallow: /forum_posts.atom
Disallow: /forum_topics/*.atom
Disallow: /forum_posts/*.atom
Disallow: /iqdb_queries
Disallow: /ip_bans
Disallow: /janitor_trials
Disallow: /maintenance
Disallow: /m/
Disallow: /mod_actions
Disallow: /moderator
Disallow: /news_updates
Disallow: /note_versions
Disallow: /notes
Disallow: /pool_elements
Disallow: /pool_orders
Disallow: /pool_versions
Disallow: /popular
Disallow: /post_appeals
Disallow: /post_flags
Disallow: /post_sets
Disallow: /post_versions
Disallow: /post_votes
Disallow: /post_events
Disallow: /post_replacements
Disallow: /post/
Disallow: /posts.atom
Disallow: /posts/random
Disallow: /posts/copy_notes
Disallow: /posts/revert
Disallow: /posts/show_seq
Disallow: /posts*?*tags=*
Disallow: /posts*?*q=*
Disallow: /posts*?*md5*
Disallow: /posts*?*limit*
Disallow: /posts*?*random*
Disallow: /posts*?*pool_id*
Disallow: /posts*?*post_set_id*
Disallow: /posts.json
Disallow: /posts.xml
Disallow: /posts/*/favorites
Disallow: /reports
Disallow: /session
Disallow: /sources
Disallow: /static
Disallow: /tag_alias_corrections
Disallow: /tag_alias_requests
Disallow: /tag_aliases
Disallow: /tag_corrections
Disallow: /tag_implication_requests
Disallow: /tag_implications
Disallow: /tags
Disallow: /tickets
Disallow: /takedowns
Disallow: /uploads
Disallow: /user_feedback
Disallow: /user/
Disallow: /users
Disallow: /wiki/
Disallow: /wiki_page_versions
Disallow: /wiki_pages*?*title=*
Disallow: /wiki_pages/new
Disallow: /wiki_pages/revert
Disallow: /wiki_pages/show_or_new

User-agent: MJ12bot
User-agent: dotbot
User-agent: coccocbot-web
User-agent: BLEXBot
User-agent: HTTrack
User-agent: Slurp
User-agent: Baiduspider
User-agent: Yandex
User-agent: magpie-crawler
User-agent: SemrushBot
User-agent: SemrushBot-SA
User-agent: AhrefsBot
Disallow: /
sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

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

Certificate validity

55
days left
0d 30d 60d 90d+

Recommended actions

  • Extend HSTS max-age to at least 31536000 (1 year) to meet the preload list criteria
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
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.
B
Health Check Endpoint
No conventional health endpoint found
REVIEW
No conventional health endpoint found
Info::
No conventional health endpoint found
Health endpoints (/health, /healthz, /status, /ping, /api/health) let uptime monitors, load balancers, and orchestration systems (Kubernetes, ECS, Fly.io) verify the service is alive. Marketing sites and small services often skip them legitimately; flagged as Info, not a failure. Probe results: /api/health: connection error, /health: connection error, /healthz: connection error, /ping: connection error, /status: connection error.
A+
DNS Records
2 A records, 31 ms lookup
PASS
2 A records, 31 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.66.160.235, 104.20.31.112
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:10::ac42:a0eb, 2606:4700:10::6814:1f70
Info::
2 nameserver(s) configured
Got: dora.ns.cloudflare.com, jim.ns.cloudflare.com
Info::
5 mail exchanger(s) configured
Info::
SPF record present in TXT
Info::
DNS resolution time: 31 ms
Got: 31 ms
A172.66.160.235, 104.20.31.112
AAAA2606:4700:10::ac42:a0eb, 2606:4700:10::6814:1f70
CNAME—
NSdora.ns.cloudflare.com, jim.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt2.aspmx.l.google.com
5 alt1.aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
TXT
SPF v=spf1 a mx include:mailgun.org include:_spf.google.com -all
google-site-verification=qjbpkux4UDx9PCVym_KTlfPi1BuBn3NhTvfkbqLiviA
google-site-verification=4Eft3hJTbdIkzOy_RrtvrtMgnhm_CnhCFnSjx05C47k
CAALookup not available with standard resolver
Resolved in 31 ms
A+
Subdomain Takeover
No subdomain takeover risk detected
PASS
No subdomain takeover risk detected
Info::
No CNAME record present
A+
DNSSEC
Signed and validating
PASS
Signed and validating
Info::
DNSSEC fully signed and chain validates (ECDSAP256SHA256)
A+
Multi-Resolver DNS Speed
Mean 15ms across 3 resolvers (spread 28ms)
PASS
Mean 15ms across 3 resolvers (spread 28ms)
Info::
Quad9: 0ms
Got: 0ms via 9.9.9.9:53
Info::
Cloudflare: 17ms
Got: 17ms via 1.1.1.1:53
Info::
Google: 28ms
Got: 28ms via 8.8.8.8:53
A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://e621.net

https://e621.net

531 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://e621.net200531 msHTTP/1.1cloudflare
A+
IPv6 Readiness
IPv6 reachable (17 ms)
PASS
IPv6 reachable (17 ms)
Info::
IPv6 is configured and reachable at 2606:4700:10::ac42:a0eb, 2606:4700:10::6814:1f70
Got: 17 ms connect
IPv6 Ready
AAAA Records 2606:4700:10::ac42:a0eb, 2606:4700:10::6814:1f70 Connection Reachable (17 ms)
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

302https://www.e621.net/
200https://e621.net/

Preferred variant: non-www

HTTP → HTTPS

301http://e621.net/ → https://e621.net/

Consistent

A
Domain Intelligence
e621.net — via NameCheap, Inc., 20 years old
PASS
e621.net — via NameCheap, Inc., 20 years old
Warning::
Domain expires in 83 days
Consider enabling auto-renewal to prevent accidental expiration.
Got: Expires Aug 1, 2026
Info::
DNSSEC is enabled
Info::
Registrar: NameCheap, 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

76 days

August 1, 2026

SSL certificate

55 days

Issued by Google Trust Services

Domain age

20 years

Registered August 1, 2006

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2606:4700:10::6814:1f70

Registrar

NameCheap, Inc.

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Renew the domain or enable auto-renewal to prevent accidental expiry
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar NameCheap, Inc.
Created August 1, 2006 (20 years ago)
Expires August 1, 2026 (2 months)
Last Updated September 22, 2025
Name Servers dora.ns.cloudflare.com, jim.ns.cloudflare.com
DNSSEC Enabled
Hosting
IP Address 2606:4700:10::6814:1f70
Data source: rdap (0.2s)

Consider enabling auto-renewal to prevent accidental expiration.

Why this matters

Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.

Source: ICANN renewal policy

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 544 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
31 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.
401 ms
Total Time Total request time from DNS lookup through full response.
545 ms

Connection waterfall

DNS Lookup 31 ms TCP Connect 17 ms TLS Handshake 22 ms Server Processing 331 ms Content Transfer 144 ms
A
CDN & Delivery
Cloudflare (DYNAMIC)
PASS
Cloudflare (DYNAMIC)
Info::
Site is served via Cloudflare CDN (edge: CDG)
Got: cf-ray: 9f9990e218ef7879-CDG
Info::
CDN cache status: DYNAMIC
CDN Detected: Cloudflare
Provider Cloudflare Cache Status DYNAMIC Evidence cf-ray: 9f9990e218ef7879-CDG
A+
CDN Cache Observability
Cache state: DYNAMIC
PASS
Cache state: DYNAMIC
Info::
CDN cache state observable via 1 header(s)
Got: cf-cache-status=DYNAMIC
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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