SSL Checker

sorbonne-universite.fr

TLS 1.3 TLS_AES_128_GCM_SHA256

Leaf Certificate

Subject sorbonne-universite.fr

Issuer YR2

Valid From Jul 25, 2026

Valid Until Oct 23, 2026 (67 days)

Algorithm SHA256-RSA

Subject Alternative Names

lettres.sorbonne-universite.frsante.sorbonne-universite.frsciences.sorbonne-universite.frsorbonne-universite.frwww.main-bvxea6i-xisee54uq2umo.fr-3.platformsh.sitewww.sorbonne-universite.fr

Intermediate

Subject YR2

Issuer Root YR

Valid From Sep 3, 2025

Valid Until Sep 2, 2028 (748 days)

Algorithm SHA256-RSA

Intermediate

Subject Root YR

Issuer ISRG Root X1

Valid From May 13, 2026

Valid Until Sep 2, 2032 (2209 days)

Algorithm SHA256-RSA

Findings

✓ TLS 1.3 supported

✓ SSL certificate valid (67 days remaining)

✓ Certificate covers 6 domains (SANs)

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Security Headers

CSP, HSTS, X-Frame-Options grade for this site

DNS Lookup

Query A, AAAA, MX, TXT, NS, CNAME, and SOA records with authoritative timing.

Redirect Checker

Trace the full HTTP redirect chain, flag loops, and surface mixed-content downgrades.

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