Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.DRedirect ChainAction3 redirect(s), 457 ms totalFIX
https://uni-frankfurt.de
81 ms · HTTP/1.1
http://www.uni-frankfurt.de/
93 ms · HTTP/1.1
https://www.uni-frankfurt.de/
108 ms · HTTP/1.1
https://www.uni-frankfurt.de/de
175 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://uni-frankfurt.de | 302 | 81 ms | HTTP/1.1 | |
| 2 | http://www.uni-frankfurt.de/ | 301 | 93 ms | HTTP/1.1 | |
| 3 | https://www.uni-frankfurt.de/ | 307 | 108 ms | HTTP/1.1 | |
| 4 | https://www.uni-frankfurt.de/de | 200 | 175 ms | HTTP/1.1 |
See the visual redirect chain in the HTTP Probe tab →
Each redirect adds latency. Try to minimize the chain to 1 hop.
Redirect chain — each hop adds latency; combine into one redirect where possible.
Source: Google Search Central / web.dev
Redirect directly from https://uni-frankfurt.de to https://www.uni-frankfurt.de/de
Redirect chain could be flattened to one hop — server config tweak removes intermediate latency.
Source: web.dev
If permanent, use 301 instead.
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
DCDN & DeliveryActionNo CDN detectedFIX
Consider using a CDN to improve global delivery speed and reduce origin load.
CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BTLS Certificate Expiry & Recommendations218 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
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 Records1 A records, 31 ms lookupPASS
| A | 141.2.37.198 |
| AAAA | — |
| CNAME | — |
| NS | wattdenn.rz.uni-frankfurt.de, chaplin.rz.uni-frankfurt.de, dns-2.dfn.de |
| MX | 10 mx1.uni-frankfurt.de 20 mx2.uni-frankfurt.de |
| TXT | apple-domain-verification=9O2ElvMkcA9WIJxP docusign=428867fb-dc41-4edf-88df-bdcf41a0dca0 adobe-idp-site-verification=2bfe06eace1bc6cc8672ddc8b4c18c5ea775c59772d31774d04a... SPF v=spf1 ip4:141.2.22.115 ip4:141.2.22.185 ip4:141.2.22.204 ip4:141.2.22.205 ip4:1... MS=75E101694B17E7B7770B961A129D1C7E9D592778 |
| CAA | Lookup not available with standard resolver |
Multiple A records provide failover if one server goes down.
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.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
A+Crawlabilityrobots.txt present, sitemap with 6 URLsPASS
# robots.txt von https://www.uni-frankfurt.de
# ID Bereiche
User-agent: *
Allow: /93095219
Allow: /51245042
Allow: /*?page=
Allow: /44662724
Allow: /99556206
Allow: /83792979
Allow: /75715457
Allow: /54233767
Allow: /49115505
Allow: /44292068
Allow: /41568540
Allow: /40805881
Allow: /39890622
Allow: /137432769
Allow: /112731403
Allow: /38298572
Allow: /37318133
Allow: /102672447
Allow: /91919538
Allow: /38298489
Allow: /36993027
Allow: /38072376
Allow: /38090278
Allow: /116578693
Allow: /88547476
Allow: /91919288
Allow: /139383707
Allow: /47549099
Allow: /40814056
Allow: /95150136
Allow: /104111268
Allow: /150872195
Allow: /151259015
Allow: /115901975
Allow: /39964695
Allow: /40155531
Allow: /54570072
Allow: /94748989
Allow: /94606296
Allow: /94436108
Allow: /76467309
Allow: /49561986
Allow: /44432397
Allow: /43668002
Allow: /43662564
Allow: /43662351
Allow: /43662305
Allow: /118963334
Allow: /60506908
# Gesperrte technische Bereiche & Parameter
User-agent: *
Disallow: /magnoliaAuthor/
Disallow: /magnoliaPublic/
Disallow: /admin/
Disallow: /tools/
Disallow: /login
Disallow: /logout
Disallow: /rest/
Disallow: /ws/
Disallow: /docroot/
Disallow: /temp/
Disallow: /cgi-bin/
Disallow: /todo.html
Disallow: /international/doku/
Disallow: /org/ltg/admin/rewe/ba/Doku2/
Disallow: /fb/fb11/ifg/
Disallow: /fb/fb11/geoscience/
Disallow: /*&*
Disallow: /*?filter=
Disallow: /_next/
Disallow: /_next/image
Disallow: /1
Disallow: /2
Disallow: /3
Disallow: /4
Disallow: /5
Disallow: /6
Disallow: /7
Disallow: /8
Disallow: /9
Disallow: /0
# --- Crawler sperren ---
User-agent: MegaIndex.ru
User-agent: Barkrowler
User-agent: aranhabot
User-agent: SEOkicks
User-agent: DotBot
User-agent: BLEXBot
User-agent: MJ12bot
User-agent: DataForSeoBot
User-agent: FemtosearchBot
User-agent: serpstatbot
User-agent: WebPageTest.org
User-agent: crawler_faq
User-agent: GeedoBot
User-agent: crawler_eb_germany
User-agent: MetaJobBot
User-agent: CCBot
User-agent: VelenPublicWebCrawler
User-agent: hgfAlphaXCrawl
User-agent: FullStoryBot
User-agent: NE Crawler
Disallow: /
# --- Sitemap angeben ---
Sitemap: https://www.uni-frankfurt.de/sitemap-index.xml
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
HTTP → HTTPS
Consistent
A+Domain Intelligenceuni-frankfurt.de — hosted on UNIFFM-NET cords@rz.uni-frankfurt.de 20101227, DEPASS
Unknown
218 days
Issued by Hellenic Academic and Research Institutions CA
Unknown
Status unknown
Protects against DNS spoofing
UNIFFM-NET cords@rz.uni-frankfurt.de 20101227, DE
ASN AS20633
141.2.37.198
Registrar unknown
Expiry timeline
Recommended actions
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
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.
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