DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Detected Technologies

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

Certificate Information

Subject
CN=optimaloptic.co.uk
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
January 08, 2026
Valid Until
April 08, 2026 45 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
AE:96:4A:04:5A:50:6A:5C:DA:28:93:A1:4B:85:91:4F:B2:E3:B3:3F:20:99:45:5C:74:27:85:87:C8:46:CC:9B
Alternative Names
90 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 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
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • 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
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

Subject Alternative Names

90 domains
linktek.cfd *.linktek.cfd *.masha-bwi-facebook.linktek.cfd

Other domains in certificate

aicbp.com *.aicbp.com
akhbar.live *.akhbar.live *.tt2.akhbar.live
amazonaschile.com *.amazonaschile.com *.ww25.amazonaschile.com *.ww38.amazonaschile.com
*.appleclouds.blogxi.com blogxi.com *.blogxi.com *.chimeara.blogxi.com *.pennywise.blogxi.com *.random.blogxi.com *.schatzi.blogxi.com *.sterndal.blogxi.com *.whimsical.blogxi.com
cookcountytreasurer.co *.cookcountytreasurer.co *.ww38.cookcountytreasurer.co
gounbroker.net *.gounbroker.net *.ww25.gounbroker.net
hotshopapp.com *.hotshopapp.com *.shop.hotshopapp.com
jenkinswindows.co.uk *.jenkinswindows.co.uk
khuccamta.net *.khuccamta.net *.marketing.khuccamta.net *.www.khuccamta.net
*.atwww.lifesourceonline.com *.comwww.lifesourceonline.com lifesourceonline.com *.lifesourceonline.com *.random.lifesourceonline.com *.sso.lifesourceonline.com *.ww25.lifesourceonline.com *.www.lifesourceonline.com
lineset.co *.lineset.co *.random.lineset.co
optimaloptic.co.uk *.optimaloptic.co.uk
plumbingtradecentre.co.uk *.plumbingtradecentre.co.uk
puzzleracers.co *.puzzleracers.co *.ww25.puzzleracers.co
restaurant-donpablo.com *.restaurant-donpablo.com *.ww25.restaurant-donpablo.com *.ww38.restaurant-donpablo.com
*.charles.sandvich.com *.dev.sandvich.com *.forum.sandvich.com *.image.sandvich.com *.m.sandvich.com *.math.sandvich.com *.mx.sandvich.com *.nhac.sandvich.com *.pool.sandvich.com sandvich.com *.sandvich.com *.travel.sandvich.com *.ww25.sandvich.com *.your.sandvich.com
saruta-kazumi.com *.saruta-kazumi.com *.ww25.saruta-kazumi.com
seaway.org *.seaway.org *.stlawrence.seaway.org
standoutdancewear.co.uk *.standoutdancewear.co.uk
*.development.sukoyaka.life *.staging.sukoyaka.life *.stg-azure.sukoyaka.life sukoyaka.life *.sukoyaka.life
willowdogrescue.co.uk *.willowdogrescue.co.uk
*.ffffffffffff.xlight.org xlight.org *.xlight.org