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https://db.tt

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
96
GRADE
A
FIX
1
REVIEW
1
PASS
6
INFO
1
Probed from Amsterdam, Netherlands
301 Moved Permanently
Checks
9
6 PASS 1 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.

B
TLS Certificate Expiry & Recommendations
324 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

324
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
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A
DNS Records
1 A records, 20 ms lookup
PASS
1 A records, 20 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 162.125.248.21
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
Has 1 IPv6 (AAAA) record(s)
Got: 2620:100:6040:21::a27d:f815
Info::
4 nameserver(s) configured
Got: ns-1191.awsdns-20.org, ns-1615.awsdns-09.co.uk, ns-473.awsdns-59.com, ns-817.awsdns-38.net
Info::
No MX records — email not configured via DNS
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
No SPF record found in TXT records
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Info::
DNS resolution time: 20 ms
Got: 20 ms
A162.125.248.21
AAAA2620:100:6040:21::a27d:f815
CNAME—
NSns-1191.awsdns-20.org, ns-1615.awsdns-09.co.uk, ns-473.awsdns-59.com, ns-817.awsdns-38.net
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 20 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.

SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.

Why this matters

Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.

Learn more ▾

SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.

Source: RFC 7208 (SPF)

A
Redirect Chain
1 redirect(s), 962 ms total
PASS
1 redirect(s), 962 ms total
Info::
Single redirect
Got: https://db.tt → https://www.dropbox.com (301)
Info::
WWW normalization redirect
Info::
Redirect overhead: 962 ms total
Got: 962 ms
Info::
Cross-domain redirect detected

https://db.tt

704 ms · HTTP/1.1

301

https://www.dropbox.com

259 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://db.tt301704 msHTTP/1.1envoy
2https://www.dropbox.com200259 msHTTP/1.1envoy

See the visual redirect chain in the HTTP Probe tab →

A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2620:100:6040:21::a27d:f815
Got: 1 ms connect
IPv6 Ready
AAAA Records 2620:100:6040:21::a27d:f815 Connection Reachable (1 ms)
A+
Crawlability
robots.txt present, sitemap with 10 URLs
PASS
robots.txt present, sitemap with 10 URLs
Info::
robots.txt is present
Got: 829 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 10 entries
Info::
Sitemap index with 10 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 829 B Sitemaps referenced 1 User-agents *, Twitterbot, facebookexternalhit Blocking No — crawling allowed
User-agent: Twitterbot
Disallow:

User-agent: facebookexternalhit
Allow: /s/
Allow: /sh/
Allow: /scl/
Allow: /sc/

User-agent: *
Allow: /static/css/
Allow: /static/images/
Allow: /static/js/
Allow: /llms.txt
Disallow: /static/
Disallow: /password_expired
Disallow: /help/sl
Disallow: /help/vodafone
Disallow: /home*
Disallow: /package_files_uploaded_via_chrome
Disallow: /photos/app_store_link/
Disallow: /recover*
Disallow: /sharing/*
Disallow: /sharing/folders*
Disallow: /sharing/files*
Disallow: /requests*
Disallow: /account*
Disallow: /referrals*
Disallow: /downgrade*
Disallow: /developers-v1
Disallow: /developers/downloads/sdks/
Disallow: /developers/whats_new
Disallow: /reengageoptout/*
Disallow: /preview/
Disallow: /s/
Disallow: /sh/
Disallow: /scl/
Disallow: /sc/


Sitemap: https://www.dropbox.com/sitemapindex.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 10 entries Valid XML Yes
Child Sitemaps:
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

https://www.db.tt/
200https://db.tt/

HTTP → HTTPS

301http://db.tt/ → https://db.tt/

Consistent

A
HTTP Probe Timing
Total 697 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
3 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
174 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
178 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
697 ms
Total Time Total request time from DNS lookup through full response.
697 ms

Connection waterfall

DNS Lookup 3 ms TCP Connect 174 ms TLS Handshake 178 ms Server Processing 341 ms Content Transfer 0 ms
Domain Intelligence
Domain intelligence data not available
INFO
Domain intelligence data not available

RDAP and WHOIS lookup both failed

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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