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CDXE

An exercise environment for Cyber Defence Exercises

Sweden Estimated origin: Sweden

Added July 26, 2026 · Last analysed July 26, 2026 · via Hacker News · 70% unique tagline

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Screenshot of CDXE

StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 26 July 2026; the live site may have changed since.

CDXE ships with the basics, with well-configured email security and fast page loads. Worth fixing first: missing several security headers, incomplete legal pages, and no sitemap.

Launched on Hacker News on July 26, 2026. The site is hosted on Cygrids Communications AB in Sweden. We've detected 5 technologies on this site, covering DNS providers, business email, maps, and media handling. The stack includes Asciinema, Leaflet, and nginx.

If you own this site, refresh the snapshot and see the full fix list any time →

4.1
StackScope Score
Fair
72/100 Launch Readiness
Well prepared
2/6 Security Headers
Weak
0/3 Legal
Missing
1/2 Crawl files
Partial
100/100 Performance
Fast
Vibe Score 0 · No AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (5)

Infrastructure
DNS one.com
Server nginx
Email
Business email one.com Email (2)
Build & Framework
Maps Leaflet medium
Media Asciinema

Infrastructure

Network
CYBERCOM-AS - Cygrids Communications AB, SE
AS34941 · SE
DNS
one.com
Authoritative nameserver
DNSSEC
Enabled
DNSKEY records published. DNS responses signed.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 7 Jul 2026 to 5 Oct 2026
Certificate as captured in this snapshot, not a live check.

Email Security

✓
SPF ~all Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✓
DMARC p=reject Reject (strict). Strong.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

✓ Custom title and meta description
⚠
Open Graph tags (title, image, description) (partial) missing og:title, og:description
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
- Canonical URL declared
- Twitter card meta tags

Performance How?

96 ms Server response
95% Faster than peers
232 ms Largest contentful paint
0.03 Cumulative layout shift
751 KB Page weight
196 KB Image weight
0 Console errors
0 Failed requests

⚠ 16 images: 16 without width/height, 16 missing alt text

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

AI Stance

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✗ sitemap.xml
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
Detection works best on English language sites.

Security Headers (2/6)

✗
Referrer-Policy
✓
X-Frame-Options via CSP frame-ancestors
✗
Permissions-Policy experimental (check browser support)
✗
X-Content-Type-Options
✓
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

✓ Code splitting
4 JS files
3 CSS files
0 Third-party domains

Brand Colours

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