DNS Gurus
Open Cached · just now
92/100 SECURITY SCORE

Certificate Information

Subject
UNKNOWN=HRB 24498, UNKNOWN={:asn1_OPENTYPE, <<19, 2, 68, 69>>}, UNKNOWN={:asn1_OPENTYPE, <<19, 20, 80, 114, 105, 118, 97, 116, 101, 32, 79, 114, 103, 97, 110, 105, 122, 97, 116, 105, 111, 110>>}, C=DE, ST=Rheinland-Pfalz, O=IONOS SE, CN=mein.ionos.de
Issuer
C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication CA EV R36
Valid From
September 24, 2025
Valid Until
October 25, 2026 353 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
71:3E:CA:0C:C3:09:57:CF:18:C8:8A:C8:EE:96:D9:52:7A:3D:72:1A:36:BF:21:4C:FA:5B:AF:34:89:EE:C8:9D
Alternative Names
50 domains

Security Configuration

TLS Protocols
TLS 1.2
Forward Secrecy
Limited (Check cipher configuration)
Warnings
  • • TLS 1.3 is not supported (recommended)

HTTP Security Headers

Status
Strict-Transport-Security
Good
max-age=31536000 ; includeSubDomains
Content-Security-Policy
Strong
default-src; img-src; font-src; +7 more
X-Frame-Options
Present
ALLOW-FROM https://my.ionos.co.uk:443/
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
  • • Consider adding 'preload' to HSTS for maximum security
  • • Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records
Not Configured (Any CA can issue certificates)
CAA Issues
  • • No CAA records configured - any CA can issue certificates
Recommendations
  • • Implement CAA records to restrict which CAs can issue certificates for your domain
  • • This adds an extra layer of security against unauthorized certificate issuance
  • • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
  • • Consider adding 'iodef' record to receive security incident reports