Cached · just now
88/100 SECURITY SCORE

Certificate Information

Subject
C=US, ST=California, L=Sunnyvale, O=LinkedIn Corporation, CN=us.linkedin.com
Issuer
C=US, O=DigiCert Inc, CN=DigiCert SHA2 Secure Server CA
Valid From
February 11, 2026
Valid Until
August 11, 2026 169 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
7A:C0:BD:8C:63:60:62:F8:C3:26:E4:0F:53:B2:B5:5A:BC:2C:AD:DC:28:4E:1B:A1:E8:41:F2:ED:C9:C8:97:C0
Alternative Names

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=31536000
Content-Security-Policy
Good
default-src; connect-src; script-src; +9 more Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Good
sameorigin
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • Strengthen CSP by removing 'unsafe-eval'
  • 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

156 domains
lk.linkedin.com lr.linkedin.com ls.linkedin.com lt.linkedin.com lu.linkedin.com lv.linkedin.com ly.linkedin.com ma.linkedin.com mc.linkedin.com md.linkedin.com me.linkedin.com mf.linkedin.com mg.linkedin.com mh.linkedin.com mi.linkedin.com mk.linkedin.com ml.linkedin.com mm.linkedin.com mn.linkedin.com mo.linkedin.com mp.linkedin.com mq.linkedin.com mr-in.linkedin.com mr.linkedin.com ms.linkedin.com mt.linkedin.com mu.linkedin.com mv.linkedin.com mw.linkedin.com mx.linkedin.com my.linkedin.com mz.linkedin.com na.linkedin.com nc.linkedin.com ne.linkedin.com nf.linkedin.com ng.linkedin.com nh.linkedin.com ni.linkedin.com nl.linkedin.com no.linkedin.com np.linkedin.com nq.linkedin.com nr.linkedin.com nt.linkedin.com nu.linkedin.com nz.linkedin.com oa.linkedin.com of.linkedin.com om.linkedin.com pa-in.linkedin.com pa.linkedin.com pc.linkedin.com pe.linkedin.com pf.linkedin.com pg.linkedin.com ph.linkedin.com pi.linkedin.com pk.linkedin.com pl.linkedin.com pm.linkedin.com pn.linkedin.com pr.linkedin.com ps.linkedin.com pt.linkedin.com pu.linkedin.com pw.linkedin.com py.linkedin.com pz.linkedin.com qa.linkedin.com ra.linkedin.com rb.linkedin.com rc.linkedin.com re.linkedin.com rh.linkedin.com ri.linkedin.com rl.linkedin.com rm.linkedin.com rn.linkedin.com ro.linkedin.com rp.linkedin.com rs.linkedin.com ru.linkedin.com rw.linkedin.com sa.linkedin.com sb.linkedin.com sc.linkedin.com sd.linkedin.com se.linkedin.com sf.linkedin.com sg.linkedin.com sh.linkedin.com si.linkedin.com sj.linkedin.com sk.linkedin.com sl.linkedin.com sm.linkedin.com sn.linkedin.com so.linkedin.com sr.linkedin.com ss.linkedin.com st.linkedin.com su.linkedin.com sv.linkedin.com sx.linkedin.com sy.linkedin.com sz.linkedin.com ta.linkedin.com tc.linkedin.com td.linkedin.com tf.linkedin.com tg.linkedin.com th.linkedin.com tj.linkedin.com tk.linkedin.com tl.linkedin.com tm.linkedin.com tn.linkedin.com to.linkedin.com tp.linkedin.com tr.linkedin.com tt.linkedin.com tv.linkedin.com tw.linkedin.com tz.linkedin.com ua.linkedin.com ug.linkedin.com uk.linkedin.com um.linkedin.com us.linkedin.com uy.linkedin.com uz.linkedin.com va.linkedin.com vc.linkedin.com vd.linkedin.com ve.linkedin.com vg.linkedin.com vi.linkedin.com vn.linkedin.com vu.linkedin.com wf.linkedin.com wg.linkedin.com wk.linkedin.com wl.linkedin.com wo.linkedin.com ws.linkedin.com wv.linkedin.com yd.linkedin.com ye.linkedin.com yt.linkedin.com yu.linkedin.com yv.linkedin.com za.linkedin.com zm.linkedin.com zr.linkedin.com zw.linkedin.com