DNS Gurus
Open Cached · just now
84/100 SECURITY SCORE

Certificate Information

Subject
CN=*.github.io
Issuer
C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA
Valid From
March 07, 2025
Valid Until
March 07, 2026 109 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
7D:11:22:EA:96:98:52:34:1E:8D:D9:2B:CC:0C:7E:CC:00:96:30:D1:4D:A7:34:D7:CA:42:D5:B5:4A:2B:20:97
Alternative Names
7 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
letsencrypt.org sectigo.com digicert.com
Wildcard CAs
digicert.com sectigo.com
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts