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 ischool.illinois.edu, ischool.uiuc.edu, lis.illinois.edu, lis.uiuc.edu, www.ischool.illinois.edu, www.ischool.uiuc.edu, www.lis.illinois.edu, www.lis.uiuc.edu, not for ec2-18-223-86-188.us-east-2.compute.amazonaws.com

Cached · just now
79/100 SECURITY SCORE

Certificate Information

Subject
C=US, ST=Illinois, O=University of Illinois, CN=ischool.illinois.edu
Issuer
C=US, O=Internet2, CN=InCommon RSA Server CA 2
Valid From
August 05, 2025
Valid Until
September 05, 2026 259 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
67:96:CE:8B:B5:72:77:CF:0B:63:FE:F3:89:03:21:CF:71:C2:E5:ED:54:F2:B0:2C:C4:E1:D9:A1:3D:06:BF:FA
Alternative Names
8 domains

Security Configuration

TLS Protocols
TLS 1.2
Forward Secrecy
Limited (Check cipher configuration)
Warnings
  • • TLS 1.3 is not supported (recommended)

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
Good
nosniff
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 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