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https://matheo-olsen.fr

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
4
PASS
4
INFO
0
Probed from Sao Paulo, Brazil
200 OK
Checks
9
4 PASS 4 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
DNS Records
1 A records, 934 ms lookup
REVIEW
1 A records, 934 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 213.32.22.17
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns2.lwsdns.com, ns3.lwsdns.com, ns4.lwsdns.com, ns1.lwsdns.com
Info::
1 mail exchanger(s) configured
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'.
Warning::
DNS resolution is slow (934 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 934 ms
A213.32.22.17
AAAA—
CNAME—
NSns2.lwsdns.com, ns3.lwsdns.com, ns4.lwsdns.com, ns1.lwsdns.com
MX
10 mail.matheo-olsen.fr
TXT
google-site-verification=Fb9C_B3nBKwigrVhML9bjzFq-K8NyXgNscFs1L57yBw
CAALookup not available with standard resolver
Resolved in 934 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)

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

C
HTTP Probe Timing
Action
Total 1807 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
592 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
206 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
229 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
1.39 s
Total Time Total request time from DNS lookup through full response.
1.81 s

Connection waterfall

DNS Lookup 592 ms TCP Connect 206 ms TLS Handshake 229 ms Server Processing 358 ms Content Transfer 422 ms
B
TLS Certificate Expiry & Recommendations
84 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

84
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
A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://matheo-olsen.fr

https://matheo-olsen.fr

1383 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://matheo-olsen.fr2001383 msHTTP/1.1
A+
Crawlability
robots.txt present, sitemap with 25 URLs
PASS
robots.txt present, sitemap with 25 URLs
Info::
robots.txt is present
Got: 128 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 25 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 128 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-Agent: *
Allow: /
Disallow: /admin/
Disallow: /api/
Disallow: /design-system

Sitemap: https://matheo-olsen.fr/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 25 entries Valid XML Yes
Sample URLs:
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)
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

302https://www.matheo-olsen.fr/
200https://matheo-olsen.fr/

Preferred variant: non-www

HTTP → HTTPS

302http://matheo-olsen.fr/ → https://matheo-olsen.fr/

Use 301 (permanent) instead of 302 (temporary)

A+
Domain Intelligence
matheo-olsen.fr — via SAS Ligne Web Services - LWS, 3 years, 5 months old, hosted on OVH
PASS
matheo-olsen.fr — via SAS Ligne Web Services - LWS, 3 years, 5 months old, hosted on OVH
Info::
Domain registered until Nov 14, 2026 (7 months remaining)
Info::
Registrar: SAS Ligne Web Services - LWS
Info::
Hosting: OVH
Got: AS16276
Domain expiry

89 days

November 14, 2026

SSL certificate

84 days

Issued by Let's Encrypt

Domain age

3 years, 5 months

Registered November 14, 2022

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

OVH

ASN AS16276

213.32.22.17

Registrar

SAS Ligne Web Services - LWS

Lock status unknown 4 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
Registrar SAS Ligne Web Services - LWS
Created November 14, 2022 (3 years, 5 months ago)
Expires November 14, 2026 (7 months)
Last Updated December 31, 2025
Name Servers ns1.lwsdns.com, ns2.lwsdns.com, ns3.lwsdns.com, ns4.lwsdns.com
Registrant Ano Nymous
Hosting
IP Address 213.32.22.17
ASN AS16276 (OVH, FR)
Provider OVH
Data source: rdap (1.8s)
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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