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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
83
GRADE
B
FIX
1
REVIEW
4
PASS
4
INFO
0
Probed from Madrid, Spain
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.

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

B
Crawlability
robots.txt present, no sitemap
REVIEW
robots.txt present, no sitemap
Info::
robots.txt is present
Got: 10240 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 10240 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed
<!doctype html><html lang="en"><head><title>Making sure you&#39;re not a bot!</title><link rel="stylesheet" href="/.within.website/x/xess/xess.css?cachebuster=devel"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="robots" content="noindex,nofollow"><style>
        body,
        html {
            height: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-left: auto;
            margin-right: auto;
        }
        .centered-div {
            text-align: center;
        }
        #status {
            font-variant-numeric: tabular-nums;
        }
        #progress {
            display: none;
            width: min(20rem, 90%);
            height: 2rem;
            border-radius: 1rem;
            overflow: hidden;
            margin: 1rem 0 2rem;
			outline-offset: 2px;
			outline: #b16286 solid 4px;
		}
        .bar-inner {
            background-color: #b16286;
            height: 100%;
            width: 0;
            transition: width 0.25s ease-in;
        }
        img#image {
        width: 20%  !important;
        }
    </style><script id="anubis_version" type="application/json">"devel"
</script><script id="anubis_challenge" type="application/json">{"rules":{"algorithm":"fast","difficulty":4},"challenge":{"issuedAt":"2026-04-22T00:09:45.167828909Z","metadata":{"User-Agent":"Mozilla/5.0 (compatible; BeaverCheck/1.0; +https://beavercheck.com)","X-Real-Ip":"141.227.188.119"},"id":"019db285-79cf-7c9b-a56a-5ca3baad70e5","method":"fast","randomData":"7aed6ed5091ea9a338b004a1586e3fa58ee1877f8346432fcb18c2bbe082de8343bf681a09f524940eebdf23bc5968e663da47c66607759e0e08ff47f775ff59","policyRuleHash":"ac980f49c4d35fab","difficulty":4,"spent":false}}
</script><script id="anubis_base_prefix" type="application/json">""
</script><script id="anubis_public_url" type="application/json">""
</script></head><body id="top"><script type="ignore"><a href="/.within.website/x/cmd/anubis/api/honeypot/4edf86f5-0637-4fbc-83be-71b945db01b8/init">Don't click me</a></script><main><svg id="Calque_1" data-name="Calque 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 595.28 233.87"><defs><style>
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d="M255.25,104.51v-.68h19.47c.23,2.34,1.21,7.32,12.37,7.32h.45c10.94,0,12.37-3.09,12.37-5.89,0-2.94-1.74-4.98-11.02-5.21l-7.7-.23c-19.62-.6-25.28-8.07-25.28-16.75v-.68c0-9.28,5.43-16.83,29.35-16.83h2.87c25.96,0,29.8,9.21,29.8,17.05v.6h-19.17c-.38-2.34-1.81-5.73-11.85-5.73h-.68c-9.58,0-11.54,1.89-11.54,4.6,0,2.57,1.89,4.6,10.41,4.83l7.92.23c20.9.6,25.88,7.17,25.88,16.68v.91c0,8.68-3.92,18.71-30.48,18.71h-2.04c-28.14,0-31.16-11.77-31.16-18.94Z"></path> <path class="cls-22" d="M360.8,66.33c30.03,0,36.75,14.26,36.75,26.33v2.26c0,12.37-5.58,27.54-36.67,27.54h-31.01v-56.14h30.94ZM359.22,108.96c17.81,0,19.54-8.53,19.54-14.56v-.45c0-5.81-1.81-14.19-19.54-14.19h-11.32v29.2h11.32Z"></path></g> <circle class="cls-3" cx="422.34" cy="111.43" r="12.4"></circle> <rect class="cls-1" x="442.46" y="100.52" width="21.82" height="21.82"></rect> <polygon class="cls-23" points="490.9 100.52 478.3 100.52 472 111.43 478.3 122.34 490.9 122.34 497.2 111.43 490.9 100.52"></polygon></g> <g><g><text class="cls-17" transform="translate(245.45 191.07)"><tspan x="0" y="0">sciences</tspan></text> <g><path class="cls-14" d="M214.14,180.17h-9.71v2.46h9.4v3.41h-9.4v2.62h9.83v3.33h-13.95v-15.11h13.83v3.29Z"></path> <path class="cls-14" d="M237.46,191.99v-15.11h4.18v15.11h-4.18Z"></path> <path class="cls-14" d="M228.06,176.88h-10.23v15.11h4.18v-4.83h6.05c4.71,0,6.25-2.17,6.25-5.04v-.22c0-2.92-1.48-5.02-6.25-5.02ZM229.97,182.06c0,1.08-.67,1.73-2.21,1.73h-5.75v-3.53h5.75c1.54,0,2.21.67,2.21,1.73v.08Z"></path></g></g> <g><polygon class="cls-1" points="160.25 170.58 160.25 173.63 186.05 173.63 186.05 199.44 189.1 199.44 189.1 170.58 160.25 170.58"></polygon> <polygon class="cls-21" points="160.25 176.95 160.25 180.01 179.32 178.34 181.17 199.44 184.23 199.44 182.1 175.04 160.25 176.95"></polygon> <polygon class="cls-16" points="160.25 182.72 160.25 185.82 173.47 183.49 176.28 199.44 179.38 199.44 175.94 179.96 160.25 182.72"></polygon> <polygon class="cls-19" points="160.25 188.12 160.25 191.28 168.53 189.06 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d="M538.04,184.11v.59c0,3.13-1.94,7.26-8.74,7.26h-.86c-6.81,0-8.74-4.13-8.74-7.26v-.59c0-3.17,1.94-7.18,8.74-7.18h.86c6.81,0,8.74,3.99,8.74,7.18ZM528.86,180.25c-4.07,0-4.99,2.21-4.99,4.01v.27c0,1.76.98,4.07,4.99,4.07s4.99-2.31,4.99-4.07v-.27c0-1.8-.88-4.01-4.99-4.01Z"></path> <path class="cls-14" d="M545.13,191.72h-3.93v-14.56h4.15l8.51,9.37v-9.37h3.91v14.56h-3.95l-8.69-9.43v9.43Z"></path> <path class="cls-14" d="M574.85,180.39h-9.25v2.6h8.98v3.33h-8.98v5.4h-4.01v-14.56h13.26v3.23Z"></path></g> <text class="cls-9" transform="translate(409.76 190.84)"><tspan x="0" y="0">sciences</tsp
sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

C
URL Variants
Action
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
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

200https://www.hal.science/
200https://hal.science/

Inconsistent — duplicate content risk

HTTP → HTTPS

302http://hal.science/ → https://hal.science/

Use 301 (permanent) instead of 302 (temporary)

B
TLS Certificate Expiry & Recommendations
153 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

153
days left
0d 30d 60d 90d+

Recommended actions

  • Add includeSubDomains to the HSTS directive
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • 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, 46 ms lookup
PASS
1 A records, 46 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 193.48.96.10
Info::
Single A record — no DNS redundancy
Multiple A records provide failover if one server goes down.
Info::
No IPv6 (AAAA) records
Info::
3 nameserver(s) configured
Got: ccsd02.in2p3.fr, ccpnvx.in2p3.fr, ccpntc3.in2p3.fr
Info::
2 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::
SPF record present in TXT
Info::
DNS resolution time: 46 ms
Got: 46 ms
A193.48.96.10
AAAA—
CNAME—
NSccsd02.in2p3.fr, ccpnvx.in2p3.fr, ccpntc3.in2p3.fr
MX
10 ccpntc20.in2p3.fr
10 ccpntc21.in2p3.fr
TXT
google-site-verification=Dot44n8XqpQEdQfm-PJLq5ViDbXzK0TkQD44Ii-ar2k
SPF v=spf1 ip4:193.48.96.0/24 include:spf.in2p3.fr ~all
google-site-verification=NQl9NPXGlgRK5l3w4Ia3jPciYGU0zZmuc9KTvXCRDOY
CAALookup not available with standard resolver
Resolved in 46 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.

A+
Redirect Chain
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://hal.science

https://hal.science

76 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://hal.science20076 msHTTP/1.1
A+
Domain Intelligence
hal.science — via OVH sas, 5 years, 5 months old, hosted on FR-RENATER Reseau National de telecommunications pour la Technologie, FR
PASS
hal.science — via OVH sas, 5 years, 5 months old, hosted on FR-RENATER Reseau National de telecommunications pour la Technologie, FR
Info::
Domain registered until Dec 11, 2029 (3 years, 8 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: OVH sas
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.
Info::
Hosting: FR-RENATER Reseau National de telecommunications pour la Technologie, FR
Got: AS2200
Domain expiry

1274 days

December 11, 2029

SSL certificate

153 days

Issued by Hellenic Academic and Research Institutions CA

Domain age

5 years, 5 months

Registered December 11, 2020

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

FR-RENATER Reseau National de telecommunications pour la Technologie, FR

ASN AS2200

193.48.96.10

Registrar

OVH sas

Unlocked 3 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 OVH sas
Created December 11, 2020 (5 years, 5 months ago)
Expires December 11, 2029 (3 years, 8 months)
Last Updated October 14, 2025
Name Servers ccpnvx.in2p3.fr, ccpntc3.in2p3.fr, ccsd02.in2p3.fr
DNSSEC Not enabled
Hosting
IP Address 193.48.96.10
ASN AS2200 (FR-RENATER Reseau National de telecommunications pour la Technologie, FR)
Provider FR-RENATER Reseau National de telecommunications pour la Technologie, FR
Data source: rdap (0.8s)

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

Connection waterfall

DNS Lookup 21 ms TCP Connect 22 ms TLS Handshake 28 ms Server Processing 24 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.

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