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 exg7.exghost.com, us.exg7.exghost.com, ch.exg7.exghost.com, smtp.us.exg7.exghost.com, smtp.ch.exg7.exghost.com, imap.us.exg7.exghost.com, imap.ch.exg7.exghost.com, pop.us.exg7.exghost.com, pop.ch.exg7.exghost.com, not for webmail.rbdinstruments.com

Cached · just now
78/100 SECURITY SCORE

Certificate Information

Subject
C=CA, ST=Ontario, L=Waterloo, O=Open Text Corporation, CN=exg7.exghost.com
Issuer
C=US, O=DigiCert Inc, CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid From
June 12, 2025
Valid Until
June 11, 2026 141 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
24:04:6F:3B:02:D5:AD:57:FC:B3:98:55:EC:E1:AD:09:A3:CB:E0:FA:CF:0C:D5:DB:D9:87:94:3C:95:66:6B:F8
Alternative Names
11 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
Missing
Not configured
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • 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
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