Skip to content
https://sapo.pt

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
89
GRADE
B
FIX
1
REVIEW
3
PASS
4
INFO
1
Probed from Santa Clara, United States
200 OK
Checks
9
4 PASS 3 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
HTTP Probe Timing
Total 1322 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
321 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
165 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
169 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
828 ms
Total Time Total request time from DNS lookup through full response.
1.32 s

Connection waterfall

DNS Lookup 321 ms TCP Connect 165 ms TLS Handshake 169 ms Server Processing 174 ms Content Transfer 494 ms
B
TLS Certificate Expiry & Recommendations
200 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

200
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, 163 ms lookup
PASS
1 A records, 163 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 213.13.145.114
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: ns.sapo.pt, ns2.sapo.pt, dns01.sapo.pt, dns02.sapo.pt
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: 163 ms
Got: 163 ms
A213.13.145.114
AAAA—
CNAME—
NSns.sapo.pt, ns2.sapo.pt, dns01.sapo.pt, dns02.sapo.pt
MX
5 mx.sapo.pt
TXT
mtc=ODU0ODBlNzEtODFjNC00ZWE1LTk2NmMtOTM2MGQyZDVlNmY0
f287y09s2zsj9hptkxzs5lzgrvwg8j27
google-site-verification=seX0gQu5Yl29CzyK9E5_5y6npSkuTbTDmPHF4amEz2k
_globalsign-domain-verification=V7TYz76TZVst185h-018Crj3WPkm7xwIw5ZIrYXG41
SPF v=spf1 include:_spf.sapo.pt -all
CAALookup not available with standard resolver
Resolved in 163 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://sapo.pt

https://sapo.pt

656 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://sapo.pt200656 msHTTP/1.1
A+
Crawlability
robots.txt present, sitemap with 743 URLs
PASS
robots.txt present, sitemap with 743 URLs
Info::
robots.txt is present
Got: 2118 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 743 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 2118 B Sitemaps referenced 4 User-agents MistralAI-User, Perplexity-User, QualifiedBot, Webzio-Extended, AI2Bot, Applebot-Extended, cohere-training-data-crawler, DuckAssistBot, Gemini-Deep-Research, Kangaroo Bot, PerplexityBot, YouBot, *, ChatGPT-User, Devin, omgili, GoogleOther, Bingbot, NovaAct, Timpibot, anthropic-ai, bigsur.ai, Claude-Web, LinerBot, PetalBot, CCBot, Datenbank Crawler, GoogleAgent-Mariner, GPTBot, Bytespider, CloudVertexBot, cohere-ai, FacebookBot, ICC-Crawler, meta-externalagent, netEstate Imprint Crawler, PanguBot, Claude-User, AddSearchBot, Amazonbot, Applebot, ChatGPT Agent, Claude-SearchBot, ClaudeBot, OAI-SearchBot, Cotoyogi, Diffbot, Google-Extended, Googlebot Blocking No — crawling allowed
User-agent: *

Sitemap: https://sapo.pt/article/sitemap.xml
Sitemap: https://sapo.pt/blockpage/sitemap.xml
Sitemap: https://sapo.pt/category/sitemap.xml
Sitemap: https://sapo.pt/sitemap.xml

Disallow: /404
Disallow: /500
Disallow: /api/v1/
Disallow: /assets/
Disallow: /pesquisa
Disallow: /pesquisar
Disallow: /search

User-agent: AddSearchBot
Disallow: /

User-agent: AI2Bot
Disallow: /

User-agent: Amazonbot
Disallow: /

User-agent: anthropic-ai
Disallow: /

User-agent: Applebot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: bigsur.ai
Disallow: /

User-agent: Bytespider
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: ChatGPT Agent
Disallow: /

User-agent: ChatGPT-User
Disallow: /

User-agent: Claude-SearchBot
Disallow: /

User-agent: Claude-User
Disallow: /

User-agent: Claude-Web
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: CloudVertexBot
Disallow: /

User-agent: cohere-ai
Disallow: /

User-agent: cohere-training-data-crawler
Disallow: /

User-agent: Cotoyogi
Disallow: /

User-agent: Datenbank Crawler
Disallow: /

User-agent: Devin
Disallow: /

User-agent: Diffbot
Disallow: /

User-agent: DuckAssistBot
Disallow: /

User-agent: FacebookBot
Disallow: /

User-agent: Gemini-Deep-Research
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GoogleAgent-Mariner
Disallow: /

User-agent: GoogleOther
Disallow: /

User-agent: Googlebot
Disallow:

User-agent: Bingbot
Disallow:

User-agent: GPTBot
Disallow: /

User-agent: ICC-Crawler
Disallow: /

User-agent: Kangaroo Bot
Disallow: /

User-agent: LinerBot
Disallow: /

User-agent: meta-externalagent
Disallow: /

User-agent: MistralAI-User
Disallow: /

User-agent: netEstate Imprint Crawler
Disallow: /

User-agent: NovaAct
Disallow: /

User-agent: OAI-SearchBot
Disallow: /

User-agent: omgili
Disallow: /

User-agent: PanguBot
Disallow: /

User-agent: Perplexity-User
Disallow: /

User-agent: PerplexityBot
Disallow: /

User-agent: PetalBot
Disallow: /

User-agent: QualifiedBot
Disallow: /

User-agent: Timpibot
Disallow: /

User-agent: Webzio-Extended
Disallow: /

User-agent: YouBot
Disallow: /
sitemap.xml 200 OK
Type URL Set URLs 743 entries Valid XML Yes
Sample URLs:
A
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Warning::
HTTP→HTTPS redirect uses 302 instead of 301
Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

308https://www.sapo.pt/
200https://sapo.pt/

HTTP → HTTPS

308http://sapo.pt/ → https://sapo.pt

Use 301 (permanent) instead of 302 (temporary)

Domain Intelligence
Domain intelligence data not available
INFO
Domain intelligence data not available

RDAP and WHOIS lookup both failed

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback