DNS Gurus
Open Cached · just now
73/100 SECURITY SCORE

Certificate Information

Subject
CN=4w.wisc.edu
Issuer
C=US, O=Amazon, CN=Amazon RSA 2048 M03
Valid From
September 08, 2025
Valid Until
October 07, 2026 319 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
47:08:97:68:17:33:BE:D0:BE:D8:97:F0:D3:9E:1F:F2:D0:EA:44:C3:E2:8F:08:38:87:89:31:B2:E5:04:2B:F3
Alternative Names
97 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
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

97 domains
4w.wisc.edu aaslanguagedatabase.wisc.edu acsss.wisc.edu actearly.wisc.edu admissions.wisc.edu africa.wisc.edu african.wisc.edu africandiaspora.wisc.edu afroamericanstudies.wisc.edu aging.wisc.edu agroecology.wisc.edu agronomy.wisc.edu agsafety.wisc.edu ahec.wisc.edu alc.wisc.edu allencentennialgarden.wisc.edu amindian.wisc.edu aoa.wisc.edu apr.wisc.edu apsi.wisc.edu are.wisc.edu ars.wisc.edu artexchange.wisc.edu arthistory.wisc.edu arts.wisc.edu artsdivision.wisc.edu artsinstitute.wisc.edu asap.wisc.edu asianamerican.wisc.edu babcockhalldairyplant.wisc.edu badgerrotc.wisc.edu bamlab.wisc.edu bas.wisc.edu beingpresent.wisc.edu bif.wisc.edu biochemmicrobio.wisc.edu biocore.wisc.edu biofeedstockbreeding.wisc.edu biologymajor.wisc.edu biologyofaging.wisc.edu birn.wisc.edu blab.wisc.edu bmolchem.wisc.edu boc.wisc.edu botany.wisc.edu mhb.wisc.edu nmgp.wisc.edu *.4w.wisc.edu *.admissions.wisc.edu *.africa.wisc.edu *.african.wisc.edu *.africandiaspora.wisc.edu *.afroamericanstudies.wisc.edu *.aging.wisc.edu *.agronomy.wisc.edu *.agsafety.wisc.edu *.alc.wisc.edu *.allencentennialgarden.wisc.edu *.ansci.wisc.edu *.ars.wisc.edu *.arthistory.wisc.edu *.babcockhalldairyplant.wisc.edu *.bamlab.wisc.edu *.beingpresent.wisc.edu *.biochem.wisc.edu *.biocore.wisc.edu *.biofeedstockbreeding.wisc.edu *.biologymajor.wisc.edu *.biologyofaging.wisc.edu *.birn.wisc.edu *.blab.wisc.edu *.bmolchem.wisc.edu *.botany.wisc.edu *.mhb.wisc.edu *.nmgp.wisc.edu 150.law.wisc.edu *.150.law.wisc.edu *.arlington.ars.wisc.edu *.badgerkickoff.ansci.wisc.edu *.cereals.agronomy.wisc.edu *.dairyforage.ars.wisc.edu *.foragesandperennialgrains.agronomy.wisc.edu *.greenhouses.ars.wisc.edu *.hancock.ars.wisc.edu *.intranet.bmolchem.wisc.edu *.jacksonlab.agronomy.wisc.edu *.lancaster.ars.wisc.edu *.marshfield.ars.wisc.edu *.meatlab.ansci.wisc.edu *.ojnoer.ars.wisc.edu *.peninsular.ars.wisc.edu *.rhinelander.ars.wisc.edu *.saddle-sirloin.ansci.wisc.edu *.salvia.botany.wisc.edu *.simcoxlab.biochem.wisc.edu *.spooner.ars.wisc.edu *.westmadison.ars.wisc.edu