Open
Cached
·
just now
79/100
SECURITY SCORE
Certificate Information
Subject
C=GB, ST=Oxfordshire, O=University of Oxford, CN=www.cs.ox.ac.uk
Issuer
C=CA, O=Entrust Limited, CN=Entrust OV TLS Issuing RSA CA 2
Valid From
October 08, 2025
Valid Until
October 08, 2026
320 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
B4:CA:84:7C:66:47:B0:12:B1:FE:13:1A:57:35:0F:4E:54:CF:C3:59:99:81:24:0C:3D:33:66:F3:CF:E3:69:60
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
Forward Secrecy
Limited
(Check cipher configuration)
Warnings
- • TLS 1.3 is not supported (recommended)
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