DNS Gurus

SSL Verification Bypassed

The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.

Reason:

Hostname Mismatch - certificate is issued for src1.yahoo.com, *.oath.com, *.ouroath.com, *.ouryahoo.com, *.yahoo.com, *.aol.com, *.aol.de, *.verizonmedia.com, *.yahooinc.com, not for yahooinc.co.uk

Open Cached · just now
92/100 SECURITY SCORE

Certificate Information

Subject
C=US, ST=New York, L=New York, O=Yahoo Holdings Inc., CN=src1.yahoo.com
Issuer
C=US, O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert SHA2 High Assurance Server CA
Valid From
August 21, 2025
Valid Until
February 11, 2026 77 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
A9:6A:3E:C8:EF:0E:5B:03:29:91:19:E3:DC:E7:78:0C:E9:77:26:54:56:6B:DD:71:8F:DA:7B:29:16:FB:7D:F9
Alternative Names
75 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
Missing
Not configured
Content-Security-Policy
Good
sandbox; default-src; img-src; +3 more
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Strengthen CSP by removing 'unsafe-eval'
  • • Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
digicert.com globalsign.com
Incident Reporting
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'issuewild' records to control wildcard certificate issuance