Open
Cached
·
just now
96/100
SECURITY SCORE
Certificate Information
Subject
CN=apps.nextcloud.com
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
December 31, 2025
Valid Until
March 31, 2026
69 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
FD:52:8F:1E:D0:04:47:27:B6:CA:9F:D7:AA:BF:F0:C6:05:7D:CD:51:44:66:D9:0F:CD:CA:BC:F8:85:2A:9E:BB
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Excellent
max-age=31536000; includeSubDomains; preload;
Content-Security-Policy
Strong
form-action; script-src; img-src; +4 more
form-action 'self' https://github.com; script-src 'self'; img-src *; connect-src 'self'; style-src 'self'; default-src 'none'; font-src 'self'
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
same-origin
Permissions-Policy
Present
interest-cohort=();
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