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https://lichess.org

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
95
GRADE
A
FIX
1
REVIEW
2
PASS
6
INFO
0
Probed from Madrid, Spain
200 OK
Checks
9
6 PASS 2 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
Crawlability
robots.txt present, no sitemap
REVIEW
robots.txt present, no sitemap
Info::
robots.txt is present
Got: 150 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 150 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed
User-agent: *
Allow: /
Disallow: /game/export/
Disallow: /games/export/
Disallow: /api/
Disallow: /opening/config/
Allow: /game/export/gif/thumbnail/
sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

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

Certificate validity

40
days left
0d 30d 60d 90d+

Recommended actions

  • Submit your domain to hstspreload.org to be added to the Chrome preload list
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
1 A records, 52 ms lookup
PASS
1 A records, 52 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 37.187.205.99
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: 2001:41d0:307:b200::
Info::
2 nameserver(s) configured
Got: dimitris.ns.cloudflare.com, serenity.ns.cloudflare.com
Info::
5 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: 52 ms
Got: 52 ms
A37.187.205.99
AAAA2001:41d0:307:b200::
CNAME—
NSdimitris.ns.cloudflare.com, serenity.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt2.aspmx.l.google.com
5 alt1.aspmx.l.google.com
10 alt4.aspmx.l.google.com
10 alt3.aspmx.l.google.com
TXT
google-site-verification=iHavQOc6X8aYmnHhfovb-1hseQ3bxT79YJiwhDzhoTo
SPF v=spf1 include:_spf.google.com include:_spf.tem.scaleway.com -all
google-site-verification=fZ08Imok7kcLaGcJg7BKQExO6vXGgSgsJUsW6JalUCo
google-site-verification=nTK9KGLK0Uk6ScCHMRZKQsh7UEFGc3f6NY1nQ2PuHHA
google-site-verification=lcne9sTo24rMZhlrGEXB3TtkTnnpZqH_hNo20DezQEc
CAALookup not available with standard resolver
Resolved in 52 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://lichess.org

https://lichess.org

82 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://lichess.org20082 msHTTP/1.1nginx
A+
IPv6 Readiness
IPv6 reachable (20 ms)
PASS
IPv6 reachable (20 ms)
Info::
IPv6 is configured and reachable at 2001:41d0:307:b200::
Got: 20 ms connect
IPv6 Ready
AAAA Records 2001:41d0:307:b200:: Connection Reachable (20 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

301https://www.lichess.org/
200https://lichess.org/

Preferred variant: non-www

HTTP → HTTPS

301http://lichess.org/ → https://lichess.org/

Consistent

A+
Domain Intelligence
lichess.org — via OVH sas, 16 years, 1 months old
PASS
lichess.org — via OVH sas, 16 years, 1 months old
Info::
Domain registered until Jun 14, 2027 (1 years, 1 months remaining)
Info::
DNSSEC is enabled
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.
Domain expiry

336 days

June 14, 2027

SSL certificate

40 days

Issued by Let's Encrypt

Domain age

16 years, 1 months

Registered June 14, 2010

DNSSEC

Enabled

Protects against DNS spoofing

Hosting

Unknown

2001:41d0:307:b200::

Registrar

OVH sas

Unlocked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar OVH sas
Created June 14, 2010 (16 years, 1 months ago)
Expires June 14, 2027 (1 years, 1 months)
Last Updated January 16, 2024
Name Servers dimitris.ns.cloudflare.com, serenity.ns.cloudflare.com
DNSSEC Enabled
Hosting
IP Address 2001:41d0:307:b200::
Data source: rdap (0.2s)

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

Connection waterfall

DNS Lookup 40 ms TCP Connect 20 ms TLS Handshake 21 ms Server Processing 40 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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