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https://cadenaser.com

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
96
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: 1903 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 1903 B Sitemaps referenced 0 User-agents * Blocking No — crawling allowed
#

# Update: 17112022

User-Agent: *


# Recursos Bloqueados

Disallow: /pxlctl.gif

Disallow: /pxlctl2.gif

Disallow: /*.swf$

Disallow: /pruebas/

Disallow: /includes/

Disallow: /eskupTSUpdate

Disallow: /especial/juegos-olimpicos/

Disallow: /pf/api/

Disallow: /tag//*

Disallow: /ThreadeskupSimple

Disallow: */Aes/$

Disallow: */Ves/$

Disallow: /configuracion_externa/

Disallow: /drive-and-listen/


# An~adidos 20250325 por oscarf

Disallow: /Ineskup

Disallow: /Outeskup

Disallow: /OuteskupSimple

Disallow: /OuteskupSimpleMustache

Disallow: /Msgeskup

Disallow: /Profileeskup

Disallow: /Threadeskup

Disallow: /ThreadeskupSimple


#Estaticos

Disallow: /estaticos/recursosgraficos/responsive/especiales/amazon-interno/*


# Buscador

Disallow: /buscar/

Disallow: */buscador/

Disallow: /tag/fecha/


#No Content

Disallow: /tag/c/ac0867c1271c39d492e04846c569c641/

Disallow: /tag/c/e60c1782635df88638703dc982a2f2cd/

Disallow: /tag/c/ac41b7d7a6e69ee6bd882135750242b8/

Disallow: /tag/c/2e4a1433dc59d21946b58238cc94e7ca/

Disallow: /hemeroteca/*


#Duplicaciones

Disallow: /tag/

Allow: /tag/*/a/

Allow: /tag/*/b/

Allow: /tag/*/c/


Allow: /tag/*/a

Allow: /tag/*/b

Allow: /tag/*/c


Disallow: /autor/francisco_jose_pedrosa_rodriguez/a/*/

Allow: /autor/francisco_jose_pedrosa_rodriguez/a/     



Disallow: /castillalamancha/2022/07/22/mister-toledo-y-su-gemelo-pillados-tras-liderar-una-red-estafadora-a-amazon-ser-toledo/

Disallow: /ser/2015/06/23/tribunales/1435079533_246872.html

Disallow: /ser/2016/01/07/tribunales/1452170057_978379.html

Disallow: /emisora/2016/05/06/radio_madrid/1462535866_996722.html"

Disallow: /audio/20050624csrcsrnac_1.Aes

Disallow: /ser/2005/06/24/audios/1119570611_660215.html

Disallow: /nacional/2024/11/18/ramon-cugat-el-problema-con-la-lesion-de-rodilla-de-ansu-fati-no-es-la-operacion-es-la-recuperacion-que-se-hizo-cadena-ser/
sitemap.xml No sitemap found

No sitemap found

Adding a sitemap helps search engines discover your pages.

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

Certificate validity

58
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
2 A records, 27 ms lookup
PASS
2 A records, 27 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 2.20.71.153, 2.20.71.150
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2a02:26f0:1380:27::5f64:6d57, 2a02:26f0:1380:27::5f64:6d5c
Info::
6 nameserver(s) configured
Got: a5-64.akam.net, a24-65.akam.net, a16-65.akam.net, a14-66.akam.net, a1-54.akam.net, a7-66.akam.net
Info::
4 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: 27 ms
Got: 27 ms
A2.20.71.153, 2.20.71.150
AAAA2a02:26f0:1380:27::5f64:6d57, 2a02:26f0:1380:27::5f64:6d5c
CNAME—
NSa5-64.akam.net, a24-65.akam.net, a16-65.akam.net, a14-66.akam.net, a1-54.akam.net, a7-66.akam.net
MX
10 poster1i.iberlayer.com
20 poster2i.iberlayer.com
30 poster4i.iberlayer.com
40 poster3i.iberlayer.com
TXT
google-site-verification=3M5cA91VDA665_aOp3YcbsEo3XA45L7xcW0bWMLgIvI
SPF v=spf1 include:_u.cadenaser.com._spf.smart.ondmarc.com -all
google-site-verification=DlOiMDlmianxVAom2D2Kekt8pxsOHagTzhFlVnV7UBI
6pvgbp7294svs3hdvhy43yczdgk4lmwx
MS=ms86118749
MS=ms11243354
google-site-verification=xgLufBmDmSGD7maN-GKVpbHcBcMGTFrdAL2JqAhjDGU
_globalsign-domain-verification=p1fktqCHnOA1sE262wg61RlM1M1TddxeBhTTQfKOf-
yandex-verification: 55c8de27ba50355e
CAALookup not available with standard resolver
Resolved in 27 ms

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://cadenaser.com

https://cadenaser.com

62 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://cadenaser.com20062 msHTTP/1.1openresty
A+
IPv6 Readiness
IPv6 reachable (1 ms)
PASS
IPv6 reachable (1 ms)
Info::
IPv6 is configured and reachable at 2a02:26f0:1380:27::5f64:6d57, 2a02:26f0:1380:27::5f64:6d5c
Got: 1 ms connect
IPv6 Ready
AAAA Records 2a02:26f0:1380:27::5f64:6d57, 2a02:26f0:1380:27::5f64:6d5c Connection Reachable (1 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.cadenaser.com/
200https://cadenaser.com/

Preferred variant: non-www

HTTP → HTTPS

301http://cadenaser.com/ → https://cadenaser.com/

Consistent

A+
Domain Intelligence
cadenaser.com — via Network Solutions, LLC, 29 years, 1 months old
PASS
cadenaser.com — via Network Solutions, LLC, 29 years, 1 months old
Info::
Domain registered until Jul 16, 2028 (2 years, 3 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: Network Solutions, LLC
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

763 days

July 16, 2028

SSL certificate

58 days

Issued by Let's Encrypt

Domain age

29 years, 1 months

Registered July 17, 1997

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

Unknown

2a02:26f0:1380:27::5f64:6d5c

Registrar

Network Solutions, LLC

Unlocked 6 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 Network Solutions, LLC
Created July 17, 1997 (29 years, 1 months ago)
Expires July 16, 2028 (2 years, 3 months)
Last Updated April 30, 2025
Name Servers a1-54.akam.net, a14-66.akam.net, a16-65.akam.net, a24-65.akam.net, a5-64.akam.net, a7-66.akam.net
DNSSEC Not enabled
Hosting
IP Address 2a02:26f0:1380:27::5f64:6d5c
Data source: rdap (0.1s)

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 90 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
28 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.
19 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
88 ms
Total Time Total request time from DNS lookup through full response.
90 ms

Connection waterfall

DNS Lookup 28 ms TCP Connect 1 ms TLS Handshake 19 ms Server Processing 41 ms Content Transfer 2 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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