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https://fau.de

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
4
PASS
4
INFO
0
Probed from Sao Paulo, Brazil
301 Moved Permanently
Checks
9
4 PASS 4 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
Redirect Chain
1 redirect(s), 1635 ms total
REVIEW
1 redirect(s), 1635 ms total
Info::
Single redirect
Got: https://fau.de → https://www.fau.de/ (301)
Info::
WWW normalization redirect
Warning::
Redirect overhead: 1635 ms total
Got: 1635 ms

https://fau.de

799 ms · HTTP/1.1

301

https://www.fau.de/

836 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://fau.de301799 msHTTP/1.1Apache
2https://www.fau.de/200836 msHTTP/1.1Apache

See the visual redirect chain in the HTTP Probe tab →

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.fau.de/
200https://fau.de/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://fau.de/ → https://fau.de/

Consistent

B
HTTP Probe Timing
Total 801 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
REVIEW
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
200 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
196 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
207 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
801 ms
Total Time Total request time from DNS lookup through full response.
801 ms

Connection waterfall

DNS Lookup 200 ms TCP Connect 196 ms TLS Handshake 207 ms Server Processing 198 ms Content Transfer 0 ms
B
TLS Certificate Expiry & Recommendations
210 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

210
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, 396 ms lookup
PASS
1 A records, 396 ms lookup
Info::
Resolves to 1 IPv4 address(es)
Got: 131.188.16.212
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: 2001:638:a000:1080::212
Info::
4 nameserver(s) configured
Got: ns1.rrze.uni-erlangen.de, ns2.rrze.uni-erlangen.de, dns-3.dfn.de, tuminfo1.informatik.tu-muenchen.de
Info::
3 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
Warning::
DNS resolution is slow (396 ms)
Slow DNS adds latency to every page load. Consider a faster DNS provider.
Got: 396 ms
A131.188.16.212
AAAA2001:638:a000:1080::212
CNAME—
NSns1.rrze.uni-erlangen.de, ns2.rrze.uni-erlangen.de, dns-3.dfn.de, tuminfo1.informatik.tu-muenchen.de
MX
10 mx-rz-3.rrze.uni-erlangen.de
10 mx-rz-1.rrze.uni-erlangen.de
10 mx-rz-2.rrze.uni-erlangen.de
TXT
ZOOM_verify_cVNffc5ySfa38XF-fExACg
apple-domain-verification=Njg7uB590BxDg7GY
MS=45B424E57115B1C0DEA71482679797E8CEA7726F
SPF v=spf1 mx ip4:131.188.11.0/26 ip6:2001:638:a000:1025::/64 ?all
google-site-verification=XyepOLNPRCHyobplPnGF0e9O-LklVAvV35UxSLPkb2k
dell-technologies-domain-verification=fau.de_c584ce10-73c9-4ce6-8675-ae3f46801f3...
cisco-ci-domain-verification=1888fbd399b82bd6aa087c80cf54b22f5e5b7490738ddaf2340...
CAALookup not available with standard resolver
Resolved in 396 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.

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

A+
IPv6 Readiness
IPv6 reachable (197 ms)
PASS
IPv6 reachable (197 ms)
Info::
IPv6 is configured and reachable at 2001:638:a000:1080::212
Got: 197 ms connect
IPv6 Ready
AAAA Records 2001:638:a000:1080::212 Connection Reachable (197 ms)
A+
Crawlability
robots.txt present, sitemap with 1567 URLs
PASS
robots.txt present, sitemap with 1567 URLs
Info::
robots.txt is present
Got: 108 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 1567 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 108 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /wp-admin/
Allow: /wp-admin/admin-ajax.php

Sitemap: https://www.fau.de/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 1567 entries Valid XML Yes
Sample URLs:
A+
Domain Intelligence
fau.de
PASS
fau.de
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

Unknown

SSL certificate

210 days

Issued by Hellenic Academic and Research Institutions CA

Domain age

Unknown

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Unknown

2001:638:a000:1080::212

Registrar

Registrar unknown

Unlocked Name servers unknown
Expiry timeline
Today
+1 year
SSL expiry Danger zone (≤30 days)
Recommended actions
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar
Hosting
IP Address 2001:638:a000:1080::212
Data source: whois (0.9s)

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

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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