Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Probed from Madrid, Spain

200 OK

Checks

5 PASS 2 REVIEW 1 FIX

CDN & Delivery

Action

No CDN detected

FIX

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.

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

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

TLS Certificate Expiry & Recommendations

195 days until leaf cert expires — 3 issues to address

REVIEW

Certificate validity

195

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

1 A records, 45 ms lookup

PASS

1 A records, 45 ms lookup

Resolves to 1 IPv4 address(es)

Got: 212.128.131.17

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

No IPv6 (AAAA) records

5 nameserver(s) configured

Got: sun.rediris.es, zafiro.usal.es, topacio.usal.es, chico.rediris.es, agata.usal.es

5 mail exchanger(s) configured

CAA records not checked

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

SPF record present in TXT

DNS resolution time: 45 ms

Got: 45 ms

A	212.128.131.17
AAAA	—
CNAME	—
NS	sun.rediris.es, zafiro.usal.es, topacio.usal.es, chico.rediris.es, agata.usal.es
MX	1 ASPMX.L.GOOGLE.COM 5 ALT1.ASPMX.L.GOOGLE.COM 5 ALT2.ASPMX.L.GOOGLE.COM 10 ALT3.ASPMX.L.GOOGLE.COM 10 ALT4.ASPMX.L.GOOGLE.COM
TXT	google-site-verification=Hl-Nbec49Zfa0pm6C72gyhJ0tL79d8IptxByLLz0Ijc f4589497422c489bb150c41d6bb1c650 v=msv1 t=94879024af7e2f4bb978487956acd7 facebook-domain-verification=rpm9hbx9inlfpos2y0zdpavawba6j1 HARICA-STbxY8xSPWSJPqCFtQu google-site-verification=1Y21DDjD7xDMBjWVSDyfw1JdVfa0eClfFzRdswWlAb8 brevo-code:f372cbd635d6f2fc2793b53a1fb7b0a5 SPF v=spf1 a:listas.usal.es a:aida.usal.es include:_spf.google.com include:spf.prote... google-site-verification=ZBU9lFwssRQtTAkEUplyg8XAWph59UUB4kJr-LhHH7k google-site-verification=uYwVYHGg7hua6RVI4udU0RG_8IEvCZKusPqtP9p4PSs adobe-idp-site-verification=450732aa7151ca475125421ac4305cafa112beb9d25120fefca6... google-site-verification=zeIFyKvapi5y8jhlhtwG3tEhDQIeHk37dVUS_9tEy8s
CAA	Lookup not available with standard resolver

Resolved in 45 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

Got: https://usal.es

https://usal.es

91 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://usal.es	200	91 ms	HTTP/1.1	Apache

A+

Crawlability

robots.txt present, sitemap with 2878 URLs

PASS

robots.txt present, sitemap with 2878 URLs

robots.txt is present

Got: 10240 bytes

sitemap.xml is present

sitemap.xml is valid XML

sitemap.xml contains 2878 entries

robots.txt references sitemap

robots.txt 200 OK

Size 10240 B Sitemaps referenced 1 User-agents Bytespider, * Blocking No — crawling allowed

#
# robots.txt
#
# This file is to prevent the crawling and indexing of certain parts
# of your site by web crawlers and spiders run by sites like Yahoo!
# and Google. By telling these "robots" where not to go on your site,
# you save bandwidth and server resources.
#
# This file will be ignored unless it is at the root of your host:
# Used:    http://example.com/robots.txt
# Ignored: http://example.com/site/robots.txt
#
# For more information about the robots.txt standard, see:
# http://www.robotstxt.org/robotstxt.html

User-agent: Bytespider
Disallow: /

User-agent: *
Sitemap: https://www.usal.es/files/sitemap.xml
Crawl-delay: 10
# Directories
Disallow: /includes/
Disallow: /misc/
Disallow: /modules/
Disallow: /profiles/
Disallow: /scripts/
Disallow: /themes/
# Files
Disallow: /CHANGELOG.txt
Disallow: /cron.php
Disallow: /INSTALL.mysql.txt
Disallow: /INSTALL.pgsql.txt
Disallow: /INSTALL.sqlite.txt
Disallow: /install.php
Disallow: /INSTALL.txt
Disallow: /LICENSE.txt
Disallow: /MAINTAINERS.txt
Disallow: /update.php
Disallow: /UPGRADE.txt
Disallow: /xmlrpc.php
# Paths (clean URLs)
Disallow: /admin/
Disallow: /comment/reply/
Disallow: /filter/tips/
Disallow: /node/add/
Disallow: /search/
Disallow: /user/register/
Disallow: /user/password/
Disallow: /user/login/
Disallow: /user/logout/
# Paths (no clean URLs)
Disallow: /?q=admin/
Disallow: /?q=comment/reply/
Disallow: /?q=filter/tips/
Disallow: /?q=node/add/
Disallow: /?q=search/
Disallow: /?q=user/password/
Disallow: /?q=user/register/
Disallow: /?q=user/login/
Disallow: /?q=user/logout/
# cursos anteriores
Disallow: /masteres/

Disallow: /*node/349$
Disallow: /*node/349/
Disallow: /*node/350$
Disallow: /*node/350/
Disallow: /*node/351$
Disallow: /*node/351/
Disallow: /*node/352$
Disallow: /*node/352/
Disallow: /*node/353$
Disallow: /*node/353/
Disallow: /*node/354$
Disallow: /*node/354/
Disallow: /*node/355$
Disallow: /*node/355/
Disallow: /*node/356$
Disallow: /*node/356/
Disallow: /*node/357$
Disallow: /*node/357/
Disallow: /*node/358$
Disallow: /*node/358/
Disallow: /*node/359$
Disallow: /*node/359/
Disallow: /*node/360$
Disallow: /*node/360/
Disallow: /*node/361$
Disallow: /*node/361/
Disallow: /*node/362$
Disallow: /*node/362/
Disallow: /*node/363$
Disallow: /*node/363/
Disallow: /*node/364$
Disallow: /*node/364/
Disallow: /*node/365$
Disallow: /*node/365/
Disallow: /*node/366$
Disallow: /*node/366/
Disallow: /*node/367$
Disallow: /*node/367/
Disallow: /*node/368$
Disallow: /*node/368/
Disallow: /*node/369$
Disallow: /*node/369/
Disallow: /*node/370$
Disallow: /*node/370/
Disallow: /*node/371$
Disallow: /*node/371/
Disallow: /*node/372$
Disallow: /*node/372/
Disallow: /*node/373$
Disallow: /*node/373/
Disallow: /*node/374$
Disallow: /*node/374/
Disallow: /*node/375$
Disallow: /*node/375/
Disallow: /*node/376$
Disallow: /*node/376/
Disallow: /*node/377$
Disallow: /*node/377/
Disallow: /*node/378$
Disallow: /*node/378/
Disallow: /*node/379$
Disallow: /*node/379/
Disallow: /*node/380$
Disallow: /*node/380/
Disallow: /*node/381$
Disallow: /*node/381/
Disallow: /*node/382$
Disallow: /*node/382/
Disallow: /*node/1588$
Disallow: /*node/1588/
Disallow: /*node/1704$
Disallow: /*node/1704/
Disallow: /*node/2261$
Disallow: /*node/2261/
Disallow: /*node/3376$
Disallow: /*node/3376/
Disallow: /*node/3655$
Disallow: /*node/3655/
Disallow: /*node/3657$
Disallow: /*node/3657/
Disallow: /*node/3658$
Disallow: /*node/3658/
Disallow: /*node/3659$
Disallow: /*node/3659/
Disallow: /*node/3660$
Disallow: /*node/3660/
Disallow: /*node/3661$
Disallow: /*node/3661/
Disallow: /*node/3662$
Disallow: /*node/3662/
Disallow: /*node/3663$
Disallow: /*node/3663/
Disallow: /*node/3664$
Disallow: /*node/3664/
Disallow: /*node/3665$
Disallow: /*node/3665/
Disallow: /*node/3666$
Disallow: /*node/3666/
Disallow: /*node/3748$
Disallow: /*node/3748/
Disallow: /*node/4810$
Disallow: /*node/4810/
Disallow: /*node/4812$
Disallow: /*node/4812/
Disallow: /*node/4819$
Disallow: /*node/4819/
Disallow: /*node/4820$
Disallow: /*node/4820/
Disallow: /*node/4822$
Disallow: /*node/4822/
Disallow: /*node/4823$
Disallow: /*node/4823/
Disallow: /*node/4824$
Disallow: /*node/4824/
Disallow: /*node/4825$
Disallow: /*node/4825/
Disallow: /*node/4826$
Disallow: /*node/4826/
Disallow: /*node/4827$
Disallow: /*node/4827/
Disallow: /*node/4828$
Disallow: /*node/4828/
Disallow: /*node/4829$
Disallow: /*node/4829/
Disallow: /*node/4830$
Disallow: /*node/4830/
Disallow: /*node/4831$
Disallow: /*node/4831/
Disallow: /*node/4836$
Disallow: /*node/4836/
Disallow: /*node/4837$
Disallow: /*node/4837/
Disallow: /*node/4838$
Disallow: /*node/4838/
Disallow: /*node/4839$
Disallow: /*node/4839/
Disallow: /*node/4840$
Disallow: /*node/4840/
Disallow: /*node/4841$
Disallow: /*node/4841/
Disallow: /*node/4842$
Disallow: /*node/4842/
Disallow: /*node/4843$
Disallow: /*node/4843/
Disallow: /*node/4844$
Disallow: /*node/4844/
Disallow: /*node/4845$
Disallow: /*node/4845/
Disallow: /*node/4846$
Disallow: /*node/4846/
Disallow: /*node/4847$
Disallow: /*node/4847/
Disallow: /*node/4848$
Disallow: /*node/4848/
Disallow: /*node/4849$
Disallow: /*node/4849/
Disallow: /*node/4850$
Disallow: /*node/4850/
Disallow: /*node/4851$
Disallow: /*node/4851/
Disallow: /*node/4852$
Disallow: /*node/4852/
Disallow: /*node/4853$
Disallow: /*node/4853/
Disallow: /*node/4854$
Disallow: /*node/4854/
Disallow: /*node/4855$
Disallow: /*node/4855/
Disallow: /*node/4856$
Disallow: /*node/4856/
Disallow: /*node/4857$
Disallow: /*node/4857/
Disallow: /*node/4858$
Disallow: /*node/4858/
Disallow: /*node/5815$
Disallow: /*node/5815/
Disallow: /*node/5816$
Disallow: /*node/5816/
Disallow: /*node/5818$
Disallow: /*node/5818/
Disallow: /*node/5819$
Disallow: /*node/5819/
Disallow: /*node/5820$
Disallow: /*node/5820/
Disallow: /*node/5821$
Disallow: /*node/5821/
Disallow: /*node/5822$
Disallow: /*node/5822/
Disallow: /*node/5823$
Disallow: /*node/5823/
Disallow: /*node/5825$
Disallow: /*node/5825/
Disallow: /*node/5826$
Disallow: /*node/5826/
Disallow: /*node/5827$
Disallow: /*node/5827/
Disallow: /*node/5828$
Disallow: /*node/5828/
Disallow: /*node/6397$
Disallow: /*node/6397/
Disallow: /*node/6398$
Disallow: /*node/6398/
Disallow: /*node/6399$
Disallow: /*node/6399/
Disallow: /*node/6401$
Disallow: /*node/6401/
Disallow: /*node/6403$
Disallow: /*node/6403/
Disallow: /*node/6404$
Disallow: /*node/6404/
Disallow: /*node/6405$
Disallow: /*node/6405/
Disallow: /*node/6406$
Disallow: /*node/6406/
Disallow: /*node/6407$
Disallow: /*node/6407/
Disallow: /*node/6408$
Disallow: /*node/6408/
Disallow: /*node/6409$
Disallow: /*node/6409/
Disallow: /*node/6410$
Disallow: /*node/6410/
Disallow: /*node/6411$
Disallow: /*node/6411/
Disallow: /*node/6412$
Disallow: /*node/6412/
Disallow: /*node/6413$
Disallow: /*node/6413/
Disallow: /*node/8974$
Disallow: /*node/8974/
Disallow: /*node/8976$
Disallow: /*node/8976/
Disallow: /*node/14539$
Disallow: /*node/14539/
Disallow: /*node/14540$
Disallow: /*node/14540/
Disallow: /*node/14541$
Disallow: /*node/14541/
Disallow: /*node/14542$
Disallow: /*node/14542/
Disallow: /*node/14543$
Disallow: /*node/14543/
Disallow: /*node/14544$
Disallow: /*node/14544/
Disallow: /*node/17151$
Disallow: /*node/17151/
Disallow: /*node/17152$
Disallow: /*node/17152/
Disallow: /*node/17153$
Disallow: /*node/17153/
Disallow: /*node/17154$
Disallow: /*node/17154/
Disallow: /*node/19936$
Disallow: /*node/19936/
Disallow: /*node/19937$
Disallow: /*node/19937/
Disallow: /*node/20582$
Disallow: /*node/20582/
Disallow: /*node/20962$
Disallow: /*node/20962/
Disallow: /*node/29773$
Disallow: /*node/29773/
Disallow: /*node/29776$
Disallow: /*node/29776/
Disallow: /*node/29777$
Disallow: /*node/29777/
Disallow: /*node/29778$
Disallow: /*node/29778/
Disallow: /*node/29779$
Disallow: /*node/29779/
Disallow: /*node/29780$
Disallow: /*node/29780/
Disallow: /*node/30115$
Disallow: /*node/30115/
Disallow: /*node/30117$
Disallow: /*node/30117/
Disallow: /*node/30119$
Disallow: /*node/30119/
Disallow: /*node/30270$
Disallow: /*node/30270/
Disallow: /*node/30271$
Disallow: /*node/30271/
Disallow: /*node/30272$
Disallow: /*node/30272/
Disallow: /*node/30273$
Disallow: /*node/30273/
Disallow: /*node/30274$
Disallow: /*node/30274/
Disallow: /*node/30275$
Disallow: /*node/30275/
Disallow: /*node/30277$
Disallow: /*node/30277/
Disallow: /*node/30279$
Disallow: /*node/30279/
Disallow: /*node/30280$
Disallow: /*node/30280/
Disallow: /*node/30281$
Disallow: /*node/30281/
Disallow: /*node/30282$
Disallow: /*node/30282/
Disallow: /*node/30284$
Disallow: /*node/30284/
Disallow: /*node/30285$
Disallow: /*node/30285/
Disallow: /*node/30286$
Disallow: /*node/30286/
Disallow: /*node/30287$
Disallow: /*node/30287/
Disallow: /*node/30288$
Disallow: /*node/30288/
Disallow: /*node/30291$
Disallow: /*node/30291/
Disallow: /*node/30292$
Disallow: /*node/30292/
Disallow: /*node/30294$
Disallow: /*node/30294/
Disallow: /*node/30295$
Disallow: /*node/30295/
Disallow: /*node/30296$
Disallow: /*node/30296/
Disallow: /*node/30297$
Disallow: /*node/30297/
Disallow: /*node/30298$
Disallow: /*node/30298/
Disallow: /*node/30299$
Disallow: /*node/30299/
Disallow: /*node/30300$
Disallow: /*node/30300/
Disallow: /*node/30301$
Disallow: /*node/30301/
Disallow: /*node/30302$
Disallow: /*node/30302/
Disallow: /*node/30303$
Disallow: /*node/30303/
Disallow: /*node/30304$
Disallow: /*node/30304/
Disallow: /*node/30305$
Disallow: /*node/30305/
Disallow: /*node/30306$
Disallow: /*node/30306/
Disallow: /*node/30307$
Disallow: /*node/30307/
Disallow: /*node/30311$
Disallow: /*node/30311/
Disallow: /*node/30312$
Disallow: /*node/30312/
Disallow: /*node/30313$
Disallow: /*node/30313/
Disallow: /*node/30314$
Disallow: /*node/30314/
Disallow: /*node/30315$
Disallow: /*node/30315/
Disallow: /*node/30318$
Disallow: /*node/30318/
Disallow: /*node/30319$
Disallow: /*node/30319/
Disallow: /*node/30320$
Disallow: /*node/30320/
Disallow: /*node/30321$
Disallow: /*node/30321/
Disallow: /*node/30322$
Disallow: /*node/30322/
Disallow: /*node/30323$
Disallow: /*node/30323/
Disallow: /*node/30324$
Disallow: /*node/30324/
Disallow: /*node/30325$
Disallow: /*node/30325/
Disallow: /*node/30326$
Disallow: /*node/30326/
Disallow: /*node/30327$
Disallow: /*node/30327/
Disallow

sitemap.xml 200 OK

Type URL Set URLs 2878 entries Valid XML Yes

Sample URLs:

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

PASS

www/non-www, trailing slash, HTTP→HTTPS

www/non-www redirect configured correctly (preferred: non-www)

HTTP→HTTPS redirect uses 302 instead of 301

Got: 302 temporary redirect Expected: 301 permanent redirect

www / non-www

301https://www.usal.es/

200https://usal.es/

Preferred variant: non-www

HTTP → HTTPS

302http://usal.es/ → https://usal.es/

Use 301 (permanent) instead of 302 (temporary)

A+

HTTP Probe Timing

Total 139 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

PASS

DNS Lookup

45 ms

TCP Connect

9 ms

TLS Handshake

19 ms

Time to First Byte

130 ms

Total Time

140 ms

Connection waterfall

DNS Lookup 45 ms TCP Connect 9 ms TLS Handshake 19 ms Server Processing 58 ms Content Transfer 9 ms

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.