DNS Gurus
Cached · just now
86/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 1
Let's Encrypt logo Let's Encrypt

Certificate Information

Subject
CN=slack-gov.com
Issuer
C=US, O=Let's Encrypt, CN=YR2
Valid From
August 09, 2026
Valid Until
November 07, 2026 76 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
25:C4:6B:E8:DB:D3:BC:31:A1:68:B2:63:30:82:EF:BB:1F:6D:FE:F5:3B:12:28:FB:C9:AE:7B:AF:45:DD:77:DE
Alternative Names
2 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
Excellent
max-age=31536000; includeSubDomains; preload
Content-Security-Policy
Missing
Not configured Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Good
no-referrer
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Content-Type-Options: nosniff
  • • 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
letsencrypt.org ; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/1542881516 digicert.com ; account=455b15ed272bed097725c6ea50e89921fc57379c5338a29305c05771df65fff1
Incident Reporting
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'issuewild' records to control wildcard certificate issuance

Subject Alternative Names

2 domains
slack-gov.com *.slack-gov.com