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https://barcelona.cat

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
79
GRADE
C
FIX
2
REVIEW
3
PASS
4
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
4 PASS 3 REVIEW 2 FIX
D
Redirect Chain
Action
3 redirect(s), 253 ms total
FIX
3 redirect(s), 253 ms total
Warning::
3 redirects before reaching final URL
Each redirect adds latency. Try to minimize the chain to 1 hop.
Info::
WWW normalization redirect
Info::
Uses 302 (temporary) redirect
If permanent, use 301 instead.
Got: https://www.barcelona.cat/

https://barcelona.cat

62 ms · HTTP/1.0

301

https://www.barcelona.cat/

141 ms · HTTP/1.1

302

https://www.barcelona.cat/ca/

39 ms · HTTP/1.1

301

https://www.barcelona.cat/ca

12 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://barcelona.cat30162 msHTTP/1.0BigIP
2https://www.barcelona.cat/302141 msHTTP/1.1nginx
3https://www.barcelona.cat/ca/30139 msHTTP/1.1nginx
4https://www.barcelona.cat/ca20012 msHTTP/1.1nginx

See the visual redirect chain in the HTTP Probe tab →

Each redirect adds latency. Try to minimize the chain to 1 hop.

Why this matters

Redirect chain — each hop adds latency; combine into one redirect where possible.

Source: Google Search Central / web.dev

If permanent, use 301 instead.

Why this matters

302 (Found) is for genuinely temporary redirects — if this redirect is permanent, switch to 301 to preserve SEO equity.

Learn more ▾

Search engines treat 302 as temporary, keeping the original URL indexed and not transferring full link equity to the destination. Use 301 (Moved Permanently) for permanent redirects (HTTP→HTTPS, www-vs-non-www, URL restructures).

Source: Google Search Central

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
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Critical::
HTTP version does not redirect to HTTPS
Got: HTTP 301 Expected: 301 redirect to HTTPS

www / non-www

302https://www.barcelona.cat/
200https://barcelona.cat/

Preferred variant: non-www

HTTP → HTTPS

301http://barcelona.cat/ → http://www.barcelona.cat/

HTTP version does not redirect to HTTPS

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

Certificate validity

201
days left
0d 30d 60d 90d+

Recommended actions

  • Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
  • 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
1 A records, 138 ms lookup
PASS
1 A records, 138 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 212.15.224.34
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: ns2.bcn.cat, ns1.bcn.cat, ns3bcn.entorno.es
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::
SPF record present in TXT
Info::
DNS resolution time: 138 ms
Got: 138 ms
A212.15.224.34
AAAA—
CNAME—
NSns2.bcn.cat, ns1.bcn.cat, ns3bcn.entorno.es
MX
10 bcnweb11.bcn.es
TXT
4m1sA2t0S5kEdxRw0cuASQK29Ys:1753-0C82-C8F8-F1A6-0767-E98B-32DC-8AF7
d273f729-86fd-479c-9c35-692a8a34377c
SPF v=spf1 ~all
91dd8ae7-52a7-48ce-a85c-52fad407bf69
cdc4d2b8-7e16-4688-b942-9ba037b1921d
8B7F-418E-DBB6-6C5F-FEF4-5BE8-2CAB-6297
CAALookup not available with standard resolver
Resolved in 138 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+
Crawlability
robots.txt present, sitemap with 459 URLs
PASS
robots.txt present, sitemap with 459 URLs
Info::
robots.txt is present
Got: 7197 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 459 entries
Info::
robots.txt does not reference a sitemap
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

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 7197 B Sitemaps referenced 0 User-agents GoogleOther-Video, Thinkbot, VelenPublicWebCrawler, WRTNBot, Bytespider, cohere-training-data-crawler, ICC-Crawler, PanguBot, GoogleOther-Image, quillbot.com, SemrushBot-SWA, FirecrawlAgent, laion-huggingface-processor, OpenAI, Google-Firebase, Claude-User, Factset_spyderbot, Panscient, YaK, ChatGPT-User, KlaviyoAIBot, LinerBot, NovaAct, OAI-SearchBot, Operator, Andibot, iaskspider/2.0, PerplexityBot, webzio-extended, *, Gemini-Deep-Research, imageSpider, NotebookLM, QualifiedBot, Google-CloudVertexBot, PhindBot, Timpibot, Applebot, meta-externalagent, MyCentralAIScraperBot, Poseidon Research Crawler, Scrapy, AI2Bot-DeepResearchEval, LinkupBot, Perplexity-User, FriendlyCrawler, Crawlspace, Diffbot, Spider, TerraCotta, Cloudflare-AutoRAG, EchoboxBot, iAskBot, KunatoCrawler, Manus-User, meta-webindexer, MistralAI-User, ShapBot, AddSearchBot, YandexAdditional, YouBot, ISSCyberRiskCrawler, wpbot, Amazonbot, AmazonBuyForMe, bigsur.ai, Claude-SearchBot, Claude-Web, Brightbot 1.0, ChatGPT Agent, Echobot Bot, TavilyBot, Ai2Bot-Dolma, FacebookBot, facebookexternalhit, GoogleAgent-Mariner, GPTBot, Poggio-Citations, Anomura, meta-externalfetcher, MistralAI-User/1.0, atlassian-bot, ChatGLM-Spider, ClaudeBot, PetalBot, SemrushBot-OCOB, TwinAgent, YandexAdditionalBot, netEstate Imprint Crawler, AI2Bot, cohere-ai, Google-Extended, Meta-ExternalFetcher, TikTokSpider, Applebot-Extended, Awario, iaskspider, IbouBot, Linguee Bot, Crawl4AI, LAIONDownloader, SBIntuitionsBot, Sidetrade indexer bot, Webzio-Extended, ZanistaBot, Bravebot, CCBot, CloudVertexBot, anthropic-ai, img2dataset, QuillBot, Datenbank Crawler, Google-NotebookLM, LCC, panscient.com, aiHitBot, Channel3Bot, Devin, DuckAssistBot, Meta-ExternalAgent, BuddyBot, DeepSeekBot, Kangaroo Bot, omgilibot, bedrockbot, Cotoyogi, GoogleOther, omgili, WARDBot, amazon-kendra, ImagesiftBot Blocking No — crawling allowed
# http://www.barcelona.cat/robots.txt v2024-01-11__D10

User-agent: AddSearchBot
User-agent: AI2Bot
User-agent: AI2Bot-DeepResearchEval
User-agent: Ai2Bot-Dolma
User-agent: aiHitBot
User-agent: amazon-kendra
User-agent: Amazonbot
User-agent: AmazonBuyForMe
User-agent: Andibot
User-agent: Anomura
User-agent: anthropic-ai
User-agent: Applebot
User-agent: Applebot-Extended
User-agent: atlassian-bot
User-agent: Awario
User-agent: bedrockbot
User-agent: bigsur.ai
User-agent: Bravebot
User-agent: Brightbot 1.0
User-agent: BuddyBot
User-agent: Bytespider
User-agent: CCBot
User-agent: Channel3Bot
User-agent: ChatGLM-Spider
User-agent: ChatGPT Agent
User-agent: ChatGPT-User
User-agent: Claude-SearchBot
User-agent: Claude-User
User-agent: Claude-Web
User-agent: ClaudeBot
User-agent: Cloudflare-AutoRAG
User-agent: CloudVertexBot
User-agent: cohere-ai
User-agent: cohere-training-data-crawler
User-agent: Cotoyogi
User-agent: Crawl4AI
User-agent: Crawlspace
User-agent: Datenbank Crawler
User-agent: DeepSeekBot
User-agent: Devin
User-agent: Diffbot
User-agent: DuckAssistBot
User-agent: Echobot Bot
User-agent: EchoboxBot
User-agent: FacebookBot
User-agent: facebookexternalhit
User-agent: Factset_spyderbot
User-agent: FirecrawlAgent
User-agent: FriendlyCrawler
User-agent: Gemini-Deep-Research
User-agent: Google-CloudVertexBot
User-agent: Google-Extended
User-agent: Google-Firebase
User-agent: Google-NotebookLM
User-agent: GoogleAgent-Mariner
User-agent: GoogleOther
User-agent: GoogleOther-Image
User-agent: GoogleOther-Video
User-agent: GPTBot
User-agent: iAskBot
User-agent: iaskspider
User-agent: iaskspider/2.0
User-agent: IbouBot
User-agent: ICC-Crawler
User-agent: ImagesiftBot
User-agent: imageSpider
User-agent: img2dataset
User-agent: ISSCyberRiskCrawler
User-agent: Kangaroo Bot
User-agent: KlaviyoAIBot
User-agent: KunatoCrawler
User-agent: laion-huggingface-processor
User-agent: LAIONDownloader
User-agent: LCC
User-agent: LinerBot
User-agent: Linguee Bot
User-agent: LinkupBot
User-agent: Manus-User
User-agent: meta-externalagent
User-agent: Meta-ExternalAgent
User-agent: meta-externalfetcher
User-agent: Meta-ExternalFetcher
User-agent: meta-webindexer
User-agent: MistralAI-User
User-agent: MistralAI-User/1.0
User-agent: MyCentralAIScraperBot
User-agent: netEstate Imprint Crawler
User-agent: NotebookLM
User-agent: NovaAct
User-agent: OAI-SearchBot
User-agent: omgili
User-agent: omgilibot
User-agent: OpenAI
User-agent: Operator
User-agent: PanguBot
User-agent: Panscient
User-agent: panscient.com
User-agent: Perplexity-User
User-agent: PerplexityBot
User-agent: PetalBot
User-agent: PhindBot
User-agent: Poggio-Citations
User-agent: Poseidon Research Crawler
User-agent: QualifiedBot
User-agent: QuillBot
User-agent: quillbot.com
User-agent: SBIntuitionsBot
User-agent: Scrapy
User-agent: SemrushBot-OCOB
User-agent: SemrushBot-SWA
User-agent: ShapBot
User-agent: Sidetrade indexer bot
User-agent: Spider
User-agent: TavilyBot
User-agent: TerraCotta
User-agent: Thinkbot
User-agent: TikTokSpider
User-agent: Timpibot
User-agent: TwinAgent
User-agent: VelenPublicWebCrawler
User-agent: WARDBot
User-agent: Webzio-Extended
User-agent: webzio-extended
User-agent: wpbot
User-agent: WRTNBot
User-agent: YaK
User-agent: YandexAdditional
User-agent: YandexAdditionalBot
User-agent: YouBot
User-agent: ZanistaBot
Disallow: /

User-agent: *
Disallow: */brand/
Allow: */brand/*.png
Allow: */brand/*.svg
Disallow: */core/
Allow: */core/*.css?
Allow: */core/*.css$
Allow: */core/*.gif
Allow: */core/*.jpeg
Allow: */core/*.jpg
Allow: */core/*.js?
Allow: */core/*.js$
Allow: */core/*.png
Allow: */core/*.svg
Disallow: */misc/
Allow: */misc/*.css?
Allow: */misc/*.css$
Allow: */misc/*.gif
Allow: */misc/*.jpeg
Allow: */misc/*.jpg
Allow: */misc/*.js?
Allow: */misc/*.js$
Allow: */misc/*.png
Disallow: */modules/
Allow: */modules/*.css?
Allow: */modules/*.css$
Allow: */modules/*.gif
Allow: */modules/*.jpeg
Allow: */modules/*.jpg
Allow: */modules/*.js?
Allow: */modules/*.js$
Allow: */modules/*.png
Disallow: */profiles/
Allow: */profiles/*.css?
Allow: */profiles/*.css$
Allow: */profiles/*.gif
Allow: */profiles/*.jpeg
Allow: */profiles/*.jpg
Allow: */profiles/*.js?
Allow: */profiles/*.js$
Allow: */profiles/*.png
Allow: */profiles/*.svg
Disallow: */themes/
Allow: */themes/*.css?
Allow: */themes/*.css$
Allow: */themes/*.gif
Allow: */themes/*.jpeg
Allow: */themes/*.jpg
Allow: */themes/*.js?
Allow: */themes/*.js$
Allow: */themes/*.png
Allow: */themes/*.svg
Disallow: *?from=
Allow: *?from=0
Allow: *?from=9
Disallow: */resources/
Allow: /resources/hu/
Disallow: */?q=admin/
Disallow: */?q=comment/
Disallow: */?q=filter/tips
Disallow: */?q=node/
Disallow: */?q=search/
Disallow: */?q=user/
Disallow: */admin/
Disallow: */cataleg-col%C2%B7lectiu-de-les-biblioteques-dels-museus
Disallow: */cgi-bin/
Disallow: */CHANGELOG.txt
Disallow: */comment/
Disallow: */cron.php
Disallow: */download/
Disallow: */estat-participant/
Disallow: */event-created/
Disallow: */filter/tips
Disallow: */image_captcha/
Disallow: */includes/
Disallow: */INSTALL.mysql.txt
Disallow: */INSTALL.pgsql.txt
Disallow: */install.php
Disallow: */INSTALL.sqlite.txt
Disallow: */INSTALL.txt
Disallow: */LICENSE.txt
Disallow: */list/
Disallow: */list?
Disallow: */listado/
Disallow: */listado?
Disallow: */llistat/
Disallow: */llistat?
Disallow: */MAINTAINERS.txt
Disallow: */mapa-interactiu-2030
Disallow: */node/
Disallow: */participantsorteig/
Disallow: */portalbcn/ 
Disallow: */publicacions?page=
Disallow: */scripts/
Disallow: */search/
Disallow: */tags/
Disallow: */tags-carab/
Disallow: */taxonomy/
Disallow: */thumbnails/
Disallow: */update.php
Disallow: */UPGRADE.txt
Disallow: */user/
Disallow: */wp-admin/
Disallow: */wp-includes/
Disallow: */xmlrpc.php
Disallow: *?pg=search&
Disallow: *forn-de-teatre-pa
Disallow: *site=APP
Disallow: /*/media/oembed
Disallow: /barcelonacultura/*?page=
Disallow: /barcelonacultura/en/collective-catalogue-museum-libraries
Disallow: /barcelonacultura/es/catalogo-colectivo-de-las-bibliotecas-de-los-museos
Disallow: /barcelonacultura/sites/default/files/
Disallow: /ca/header-ajuntament
Disallow: /calendari-placa-catalunya/
Disallow: /cistellacovid
Disallow: /felicitacio
Disallow: /grec/*?page=
Disallow: /grec/api/
Disallow: /index.php/*/media/oembed
Disallow: /index.php/media/oembed
Disallow: /media/oembed
Disallow: /nodisponible/
Disallow: /portolimpic/
Disallow: /README.txt
Disallow: /recorregut/*
Disallow: /sites/all/static/recorregut/*
Disallow: /somdemercat/*?page=
Disallow: /web.config
Disallow: /ciutatcuidadora/es/agenda
Disallow: /ciutatcuidadora/en/agenda
Disallow: /ciutatcuidadora/ca/agenda
Disallow: /ciutatcuidadora/es/espacio-barcelona-cuida/agenda
Disallow: /ciutatcuidadora/ca/espai-barcelona-cuida/agenda
Disallow: /ciutatcuidadora/en/barcelona-care-centre/agenda
Disallow: /ciutatcuidadora/ca/noticies?page=
Disallow: /ciutatcuidadora/es/noticies?page=
Disallow: /ciutatcuidadora/en/noticies?page= 
Disallow: */carousel_capcalera/
Disallow: */capcaleres/
Allow: /nadal/ca/activitats/llistat
Allow: /nadal/es/actividades/listado
Allow: /nadal/en/activities/list
Disallow: */demo-minerva/ 
Disallow: */demo-aglaia/ 
Disallow: */demo-talia/
sitemap.xml 200 OK
Type URL Set URLs 459 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
barcelona.cat — via Entorno Digital, 20 years, 5 months old, hosted on jvelilla@bcn.cat, ES
PASS
barcelona.cat — via Entorno Digital, 20 years, 5 months old, hosted on jvelilla@bcn.cat, ES
Info::
Domain registered until Feb 22, 2027 (10 months remaining)
Info::
Registrar: Entorno Digital
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: jvelilla@bcn.cat, ES
Got: AS60314
Domain expiry

251 days

February 22, 2027

SSL certificate

201 days

Issued by Firmaprofesional S.A.

Domain age

20 years, 5 months

Registered February 22, 2006

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

jvelilla@bcn.cat, ES

ASN AS60314

212.15.224.34

Registrar

Entorno Digital

Unlocked 3 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 Entorno Digital
Created February 22, 2006 (20 years, 5 months ago)
Expires February 22, 2027 (10 months)
Last Updated January 26, 2026
Name Servers ns2.bcn.cat, ns1.bcn.cat, ns3bcn.entorno.es
Registrant Ajuntament de Barcelona
Hosting
IP Address 212.15.224.34
ASN AS60314 (jvelilla@bcn.cat, ES)
Provider jvelilla@bcn.cat, ES
Data source: whois (1.0s)

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

Connection waterfall

DNS Lookup 130 ms TCP Connect 47 ms TLS Handshake 36 ms Server Processing 11 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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