Skip to content
https://www.dagster.io

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
85
GRADE
B
FIX
0
REVIEW
5
PASS
4
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
4 PASS 5 REVIEW
B
DNS Records
1 A records, 31 ms lookup
REVIEW
1 A records, 31 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 198.202.211.1
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:cb:2000::1
Warning::
CNAME record at zone apex
A CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.
Got: cdn.webflow.com
Info::
2 nameserver(s) configured
Got: journey.ns.cloudflare.com, lamar.ns.cloudflare.com
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: 31 ms
Got: 31 ms
A198.202.211.1
AAAA2620:cb:2000::1
CNAMEcdn.webflow.com
NSjourney.ns.cloudflare.com, lamar.ns.cloudflare.com
MX—
TXT—
CAALookup not available with standard resolver
Resolved in 31 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 CNAME at the zone apex can break MX and NS records. Use ALIAS/ANAME or A records instead.

Why this matters

CNAME at the apex (example.com) breaks every other apex record (MX, TXT, NS) — DNS-protocol violation per RFC 1034.

Learn more ▾

RFC 1034 forbids CNAME alongside other records at the same name. Some DNS providers offer ALIAS / ANAME / flattened-CNAME records that work around this — use those instead. Otherwise apex-level CNAME breaks email (no MX), domain ownership verification (no TXT), and more.

Source: RFC 1034

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)

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.dagster.io/
200https://dagster.io/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://www.dagster.io/ → https://www.dagster.io/

Consistent

B
Domain Intelligence
dagster.io — via GoDaddy.com, LLC, 8 years old, hosted on Cloudflare
REVIEW
dagster.io — via GoDaddy.com, LLC, 8 years old, hosted on Cloudflare
Critical::
Domain expires in 22 days
This domain expires on April 30, 2026. Domains that expire accidentally cause complete website downtime. Enable auto-renewal or renew manually now.
Got: Expires Apr 30, 2026
Info::
Registrar: GoDaddy.com, LLC
Info::
Hosting: Cloudflare
Got: AS209242
Domain expiry

EXPIRED

April 30, 2026

SSL certificate

70 days

Issued by Google Trust Services

Domain age

8 years

Registered April 30, 2018

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS209242

198.202.211.1

Registrar

GoDaddy.com, LLC

Lock status unknown 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Domain has EXPIRED — renew immediately to avoid total site outage
Registrar GoDaddy.com, LLC
Created April 30, 2018 (8 years ago)
Expires April 30, 2026 (22 days)
Last Updated June 14, 2025
Name Servers ns-282.awsdns-35.com, ns-1589.awsdns-06.co.uk, ns-680.awsdns-21.net, ns-1182.awsdns-19.org
Registrant Domains By Proxy, LLC
Hosting
IP Address 198.202.211.1
ASN AS209242 (CLOUDFLARESPECTRUM Cloudflare, Inc., US)
Provider Cloudflare
Data source: whois (1.3s)

This domain expires on April 30, 2026. Domains that expire accidentally cause complete website downtime. Enable auto-renewal or renew manually now.

Why this matters

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

Source: ICANN renewal policy

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

Certificate validity

70
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
CDN & Delivery
Cloudflare (BYPASS)
REVIEW
Cloudflare (BYPASS)
Info::
Site is served via Cloudflare CDN (edge: MAD)
Got: cf-ray: 9e8bd09cbc9c5646-MAD
Info::
CDN cache status: BYPASS
CDN Detected: Cloudflare
Provider Cloudflare Cache Status BYPASS Evidence cf-ray: 9e8bd09cbc9c5646-MAD
A
Redirect Chain
1 redirect(s), 348 ms total
PASS
1 redirect(s), 348 ms total
Info::
Single redirect
Got: https://www.dagster.io → https://dagster.io/ (301)
Info::
WWW normalization redirect

https://www.dagster.io

262 ms · HTTP/1.1

301

https://dagster.io/

86 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://www.dagster.io301262 msHTTP/1.1cloudflare
2https://dagster.io/20086 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 2620:cb:2000::1
Got: 17 ms connect
IPv6 Ready
AAAA Records 2620:cb:2000::1 Connection Reachable (17 ms)
A+
Crawlability
robots.txt present, sitemap with 1150 URLs
PASS
robots.txt present, sitemap with 1150 URLs
Info::
robots.txt is present
Got: 63 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 1150 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 63 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Allow: /

Sitemap: https://dagster.io/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 1150 entries Valid XML Yes
Sample URLs:
A
HTTP Probe Timing
Total 473 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
58 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
1 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
12 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
474 ms
Total Time Total request time from DNS lookup through full response.
474 ms

Connection waterfall

DNS Lookup 58 ms TCP Connect 1 ms TLS Handshake 12 ms Server Processing 403 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback