SSL Certificate Analysis for 1mun.com - Security Grade & TLS Configuration

Detected Technologies

See all in URL Inspect 1

Let's Encrypt

Certificate Information

Subject

CN=promocjezchin.pl

Issuer

C=US, O=Let's Encrypt, CN=R12

Valid From

December 27, 2025

Valid Until

March 27, 2026 40 days

Public Key

RSA 4096 bit Strong

Signature Algorithm

SHA256-RSA

SHA-256 Fingerprint

B1:3F:DB:8A:4D:49:BC:68:70:CE:CA:AA:13:CD:E4:6C:22:A0:9F:FB:BF:FA:92:38:34:A6:94:CA:A7:1F:29:AD

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

X-Frame-Options

Excellent

DENY

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

strict-origin

Permissions-Policy

Present

geolocation=(),midi=(),sync-xhr=(),microphone=(),camera=(),magnetometer=(),gyroscope=(),fullscreen=(self),payment=()

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