kaeltebringer.de security report

Certificate, security headers, email authentication, DNS, registration, and exposed hosts — from public sources.

55risk

Elevated

Several issues worth triaging this week.

0Critical

1High

5Medium

8Low

2Info

Collected 14 hours ago23.2sfrom cache

Certificate Transparency9
DNS resolution17
Network ownership0
CDN / WAF detection0
Exposed ports & CVEs57
Registration
DNS posture2
Email authentication1
Certificate
Security headers4
Archived URLs
Analysis16

noteFound 17 addresses; enriching the first 12.
noteCertificate inspection is unavailable in this runtime.
noteNetwork ownership lookup is unavailable in this runtime; ASN and org are omitted.
noteCDN/WAF detection is unavailable in this runtime.
noteNo registration data: RDAP has no record at this level.
note3 hosts were identified as CDN/edge infrastructure from ASN ownership rather than a cdncheck fingerprint.

Nothing tells receiving mail servers which hosts may send as @kaeltebringer.de, so anyone can. Phishing that impersonates this domain will land in inboxes.
What to do
Publish an SPF TXT record listing your senders and ending in -all.
asset: kaeltebringer.de
The browser will also send this cookie over plain http://, where it can be captured.
What to do
Add `Secure` to the cookie.
asset: https://www.kaeltebringer.de/
The browser will also send this cookie over plain http://, where it can be captured.
What to do
Add `Secure` to the cookie.
asset: https://www.kaeltebringer.de/
The browser will also send this cookie over plain http://, where it can be captured.
What to do
Add `Secure` to the cookie.
asset: https://www.kaeltebringer.de/
The browser will also send this cookie over plain http://, where it can be captured.
What to do
Add `Secure` to the cookie.
asset: https://www.kaeltebringer.de/
Receivers are asked to report spoofing but not to block it. This is the right first step, and the wrong place to stop.
What to do
Once reports look clean, move to p=quarantine, then p=reject.
asset: kaeltebringer.de
einbau-preview.kaeltebringer.de appears in Certificate Transparency logs. Names like this usually front staging, admin, or internal tooling, which tends to be patched later and monitored less than production.
What to do
Confirm this host is meant to be public. If not, put it behind SSO or an allow-list.
asset: einbau-preview.kaeltebringer.de
Browsers and the preload list expect at least six months; shorter values give little protection between visits.
What to do
Raise max-age to 31536000 (one year).
asset: https://www.kaeltebringer.de/
Full URLs — including any tokens or IDs in them — are sent to every third party the page links to.
What to do
Send `Referrer-Policy: strict-origin-when-cross-origin`.
asset: https://www.kaeltebringer.de/
Without HttpOnly, any injected script can read and exfiltrate this cookie.
What to do
Add `HttpOnly` unless client-side code genuinely needs to read it.
asset: https://www.kaeltebringer.de/
Without HttpOnly, any injected script can read and exfiltrate this cookie.
What to do
Add `HttpOnly` unless client-side code genuinely needs to read it.
asset: https://www.kaeltebringer.de/
Without HttpOnly, any injected script can read and exfiltrate this cookie.
What to do
Add `HttpOnly` unless client-side code genuinely needs to read it.
asset: https://www.kaeltebringer.de/
Without HttpOnly, any injected script can read and exfiltrate this cookie.
What to do
Add `HttpOnly` unless client-side code genuinely needs to read it.
asset: https://www.kaeltebringer.de/
Answers for this domain are not signed, so a resolver cannot tell a forged response from a real one.
What to do
Enable DNSSEC at your DNS host and publish the DS record at the registrar.
asset: kaeltebringer.de
Mail to this domain can be downgraded to plaintext by an on-path attacker, because senders have no way to know TLS is required.
What to do
Publish an MTA-STS policy (a TXT record plus a small HTTPS-hosted file).
asset: kaeltebringer.de
Any public certificate authority may issue certificates for this domain. CAA lets you name the ones allowed to.
What to do
Add a CAA record naming your CA, e.g. `0 issue "letsencrypt.org"`.
asset: kaeltebringer.de

final https://www.kaeltebringer.de/status 200time 1874msstack cloudflare

✓http:// redirects to https://
!Strict-Transport-Security
max-age=7889238
✓Content-Security-Policy
block-all-mixed-content; frame-ancestors 'none'; upgrade-insecure-requests;
✓Clickjacking protection
DENY
✓X-Content-Type-Options
nosniff
✗Referrer-Policy
–Permissions-Policyoptional
–security.txt publishedoptional — tells researchers where to report bugs

✗Cookie _shopify_y
no Secure · no HttpOnly · SameSite=lax
✗Cookie _shopify_s
no Secure · no HttpOnly · SameSite=lax
✗Cookie localization
no Secure · no HttpOnly · SameSite=lax
✗Cookie cart_currency
no Secure · no HttpOnly · SameSite=lax
✓Cookie _shopify_essential
Secure · HttpOnly · SameSite=lax
✓Cookie _shopify_analytics
Secure · HttpOnly · SameSite=lax
✓Cookie _shopify_marketing
Secure · HttpOnly · SameSite=lax

✓Receives mail via 1 server
smtpin.rzone.de
✗SPF
no record
!DMARCp=none
v=DMARC1; p=none
!MTA-STSinbound mail can be downgraded to plaintext

!DNSSECanswers can be forged
–CAAany CA may issue
–IPv6 (AAAA)IPv4 only
✓2 nameservers
docks13.rzone.de shades10.rzone.de

Address	Ports	Edge	Network
23.227.38.74 www.kaeltebringer.de +4	80443205220532082208320862087+5	Cloudflare~	—
23.227.38.32 kaeltebringer.de +3	80443205220532082208320862087+5	Cloudflare~	—
162.159.140.147 support.kaeltebringer.de +3	80443205220532082208320862087+5	Cloudflare~	—
216.150.16.65 einbau.kaeltebringer.de +2	80443	direct	—
216.150.1.65 einbau.kaeltebringer.de +2	80443	direct	—
216.150.16.129 einbau-preview.kaeltebringer.de +3	80443	direct	—
216.150.1.129 einbau-preview.kaeltebringer.de +3	80443	direct	—
151.115.15.217 metrics.kaeltebringer.de +1	80443	direct	—
65.9.130.62 stats.kaeltebringer.de +4	80443	direct	—
65.9.130.74 stats.kaeltebringer.de +4	80443	direct	—
65.9.130.68 stats.kaeltebringer.de +3	80443	direct	—
65.9.130.73 stats.kaeltebringer.de +4	80443	direct	—

Archived URLs

Endpoints the Wayback Machine has kept — config files, backups, scripts. Slow to fetch, so it is here on request.

kaeltebringer.de security report

Elevated

Findings

Security headers

Email authentication

DNS

Hosts

Hostnames