Guest session
Check Detail

heise.de · DNS

Passed Grade A
100.0%
Hostname heise.de
Check name DNS
last run 02/12/2025 08:55
Result
Incomplete Grade B 82.7%

Result Detail

DNS
Host Type Answer TTL
193.99.144.80 —
2a02:2e0:3fe:1001:302:: —

Result Detail

HEADER
Alerts
  • Strict-Transport-Security: HSTS active but add includeSubDomains; consider preload
  • Content-Security-Policy: Content-Security-Policy missing
  • Referrer-Policy: Header missing
  • Permissions-Policy: Permissions-Policy missing
  • Cross-Origin-Embedder-Policy: Header missing
  • Cross-Origin-Resource-Policy: Header missing
  • Expect-CT: Expect-CT missing
  • X-Permitted-Cross-Domain-Policies: Header missing
  • Access-Control-Allow-Origin: Access-Control-Allow-Origin missing
  • Server: Sensitive header exposed
  • Origin-Agent-Cluster: Header missing
Normalized headers
server nginx
date Tue, 02 Dec 2025 07:55:09 GMT
content-type text/html; charset=utf-8
x-cache-status HIT
x-cache-date Tue, 02 Dec 2025 07:54:39 GMT
last-modified Tue, 02 Dec 2025 07:55:09 GMT
age 15
accept-ranges bytes
strict-transport-security max-age=15768000
x-frame-options DENY
x-xss-protection 1; mode=block
x-content-type-options nosniff
cross-origin-opener-policy same-origin
x-hacc-refreshed
vary Accept-Encoding, X-Export-Agent, X-Export-Format, X-Export-IAP
cache-control no-store
Transport
Check name Status Actual Expected Detail Severity Recommendation
Strict-Transport-Security ⚠️ Warning max-age=15768000 max-age>=15768000; includeSubDomains; preload HSTS active but add includeSubDomains; consider preload Critical Strict-Transport-Security: max-age=63072000; includeSubDomains; preload
Expect-CT ❌ Missing enforce; max-age>=86400 Expect-CT missing Medium Expect-CT: enforce, max-age=86400, report-uri="https://report.example.com"
Content Security
Check name Status Actual Expected Detail Severity Recommendation
Content-Security-Policy ❌ Missing default-src 'self'; frame-ancestors 'none' Content-Security-Policy missing Critical Content-Security-Policy: default-src 'self'; frame-ancestors 'none'
MIME
Check name Status Actual Expected Detail Severity Recommendation
X-Content-Type-Options ✅ Passed nosniff nosniff Value matches recommendation High X-Content-Type-Options: nosniff
Framing
Check name Status Actual Expected Detail Severity Recommendation
X-Frame-Options ✅ Passed DENY DENY or SAMEORIGIN Value accepted High X-Frame-Options: DENY
Privacy
Check name Status Actual Expected Detail Severity Recommendation
Referrer-Policy ❌ Missing strict-origin-when-cross-origin / same-origin Header missing Medium Referrer-Policy: strict-origin-when-cross-origin
Browser Features
Check name Status Actual Expected Detail Severity Recommendation
Permissions-Policy ❌ Missing camera=(); geolocation=(); microphone=() Permissions-Policy missing Medium Permissions-Policy: camera=(), geolocation=(), microphone=()
Cross-Origin
Check name Status Actual Expected Detail Severity Recommendation
Cross-Origin-Opener-Policy ✅ Passed same-origin same-origin Value matches recommendation High Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Embedder-Policy ❌ Missing require-corp Header missing High Cross-Origin-Embedder-Policy: require-corp
Cross-Origin-Resource-Policy ❌ Missing same-origin Header missing Medium Cross-Origin-Resource-Policy: same-origin
Origin-Agent-Cluster ❌ Missing ?1 Header missing Low Origin-Agent-Cluster: ?1
Caching
Check name Status Actual Expected Detail Severity Recommendation
Cache-Control ✅ Passed no-store no-store, private, max-age=0 no-store, private, max-age=0 High Cache-Control: no-store, private, max-age=0
Legacy
Check name Status Actual Expected Detail Severity Recommendation
X-Permitted-Cross-Domain-Policies ❌ Missing none Header missing Low X-Permitted-Cross-Domain-Policies: none
CORS
Check name Status Actual Expected Detail Severity Recommendation
Access-Control-Allow-Origin ❌ Missing Scoped origin (no wildcard) Access-Control-Allow-Origin missing Medium Access-Control-Allow-Origin: https://app.example.com
Information Disclosure
Check name Status Actual Expected Detail Severity Recommendation
Server ❌ Missing nginx Header removed or generic Sensitive header exposed High Remove Server header or set to a generic token
X-Powered-By ✅ Passed Header removed Header not exposed High Remove X-Powered-By header
X-AspNet-Version ✅ Passed Header removed Header not exposed Medium Remove framework version headers
Raw headers
HTTP/2 200 
server: nginx
date: Tue, 02 Dec 2025 07:55:09 GMT
content-type: text/html; charset=utf-8
x-cache-status: HIT
x-cache-date: Tue, 02 Dec 2025 07:54:39 GMT
last-modified: Tue, 02 Dec 2025 07:55:09 GMT
age: 15
accept-ranges: bytes
strict-transport-security: max-age=15768000
x-frame-options: DENY
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
cross-origin-opener-policy: same-origin
x-hacc-refreshed: 
vary: Accept-Encoding, X-Export-Agent, X-Export-Format, X-Export-IAP
cache-control: no-store

Result Detail

SSL
Check name Status Value
certificate chain is complete ✅ Passed 3
root CA is trusted ✅ Passed Trusted
cert valid for ✅ Passed 63
chain certs are valid until ✅ Passed 03.02.2026
CN matches Domainname ✅ Passed heise.de
certificate subject ✅ Passed CN=heise.de
certificate issuer ✅ Passed C=US, O=Let's Encrypt, CN=R12
signature algorithm ✅ Passed RSA-SHA256
TLS protocol ✅ Passed TLSv1.2 ECDHE-RSA-AES128-GCM-SHA256
Subject Alternative Names ✅ Passed heise.de
Public Key ✅ Passed RSA 2048
Certificate chain
# Common name Issuer Valid until CA
0 heise.de C=US, O=Let's Encrypt, CN=R12 03.02.2026 06:09:46 No
1 heise.de C=US, O=Let's Encrypt, CN=R12 03.02.2026 06:09:46 No
2 R12 C=US, O=Internet Security Research Group, CN=ISRG Root X1 13.03.2027 00:59:59 Yes
TLS details
Negotiated protocol TLSv1.2
Cipher suite ECDHE-RSA-AES128-GCM-SHA256 (128 bit)
Cipher version TLSv1.2
Perfect Forward Secrecy OK
Earliest chain expiry 03.02.2026 06:09
Fingerprints
SHA-256 62:9F:37:70:72:1B:17:2E:9B:37:6F:2B:2A:CF:22:56:5A:65:4C:60:6D:C4:A3:ED:EC:12:71:96:31:AE:72:49
SHA-1 A3:27:E4:38:01:BE:11:FD:EC:46:7C:0A:F5:D7:82:08:4C:E8:79:3A
Revocation
OCSP URLs
—
CRL URLs
Full Name: URI:http://r12.c.lencr.org/85.crl
Issuer URLs (AIA)
http://r12.i.lencr.org/
OCSP Must-Staple No
Trust evaluation

Attempted: Yes

Trusted: Yes

OpenSSL diagnostic command
openssl s_client -connect heise.de:443 -servername heise.de

Result Detail

WAF
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