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 reroute443.microsoft.com, not for onenote.co.uk

Cached · just now
81/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 9
Microsoft Entra ID logo Microsoft Entra ID Akamai logo Akamai Active incidents Azure Blob Storage logo Azure Blob Storage AzureFrontDoor logo AzureFrontDoor Azure Monitor logo Azure Monitor LinkedIn logo LinkedIn Microsoft Azure logo Microsoft Azure Microsoft 365 logo Microsoft 365 Microsoft SharePoint logo Microsoft SharePoint

Certificate Information

Subject
C=US, ST=WA, L=Redmond, O=Microsoft Corporation, CN=reroute443.microsoft.com
Issuer
C=US, O=Microsoft Corporation, CN=Microsoft TLS G2 RSA CA OCSP 02
Valid From
March 10, 2026
Valid Until
September 06, 2026 148 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA384-RSA
SHA-256 Fingerprint
CB:1B:37:35:4D:1E:D0:A1:CC:AB:8C:96:12:9F:24:47:FE:39:1D:5D:47:F6:FB:74:F9:8E:D1:02:15:3F:7D:A9
Alternative Names
1 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
Good
max-age=31536000; includeSubDomains
Content-Security-Policy
Microsoft Entra ID logo
Basic
script-src; style-src; default-src; +15 more Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Consider adding 'preload' to HSTS for maximum security
  • • Improve CSP by adding more specific directives and removing 'unsafe-inline'
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Not Authorized (Potential misconfiguration)
Authorized CAs
globalsign.com microsoft.com digicert.com
Incident Reporting
CAA Issues
  • • CRITICAL: Current certificate issuer 'C=US, O=Microsoft Corporation, CN=Microsoft TLS G2 RSA CA OCSP 02' is NOT authorized by CAA records. Authorized CAs: globalsign.com, microsoft.com, digicert.com
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'issuewild' records to control wildcard certificate issuance

Subject Alternative Names

1 domain
reroute443.microsoft.com