SSL Certificate Analysis for dev.kuechenklaus.de - Security Grade & TLS Configuration

Detected Technologies

See all in URL Inspect 1

Let's Encrypt

Certificate Information

Subject

CN=insensato.it

Issuer

C=US, O=Let's Encrypt, CN=R13

Valid From

April 22, 2026

Valid Until

July 21, 2026 60 days

Public Key

RSA 4096 bit Strong

Signature Algorithm

SHA256-RSA

SHA-256 Fingerprint

43:D6:12:6B:7F:32:91:2C:AE:10:C1:BE:3D:69:C6:48:C9:5F:2C:11:33:CE:6D:75:C2:AB:59:69:CE:40:AE:CE

Alternative Names

90 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

Excellent

max-age=31536000; includeSubDomains; preload

Content-Security-Policy

Missing

Not configured Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Excellent

DENY

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin

Permissions-Policy

Present

geolocation=(), midi=(), sync-xhr=(); +6 more

Recommendations

• Add Content-Security-Policy header to prevent XSS attacks

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