DNS Gurus
Cached · just now
91/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 1
Let's Encrypt logo Let's Encrypt

Certificate Information

Subject
CN=www.flyingcircus.io
Issuer
C=US, O=Let's Encrypt, CN=YE2
Valid From
July 02, 2026
Valid Until
September 30, 2026 54 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
C5:5E:13:1B:64:B6:35:9E:23:B2:53:44:5A:63:1D:8E:98:71:DC:11:F9:A0:62:C9:E9:EA:B5:7D:F9:77:28:BE
Alternative Names
5 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=31536000, max-age=31536000
Content-Security-Policy
Missing
Not configured Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Present
SAMEORIGIN, sameorigin
X-Content-Type-Options
Present
nosniff, nosniff
Referrer-Policy
Good
strict-origin
Permissions-Policy
Present
geolocation=(), camera=(), microphone=()
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
letsencrypt.org
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
  • • Consider adding 'issuewild' records to control wildcard certificate issuance

Subject Alternative Names

5 domains
flyingcircus.de www.flyingcircus.de

Other domains in certificate

fcio.net www.fcio.net
www.flyingcircus.io