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Introduction In Cisco ISE, every control-plane and data-plane handshake you rely on (Admin GUI, EAP-TLS, Guest/BYOD portals, pxGrid, RADIUS DTLS/RADSEC, SAML, ERS/OpenAPI) is anchored to X.509 certificates. A single expired, mismatched, or incorrectly-assigned cert can take down logins, break posture, or sever pxGrid. Today’s workbook […]
![[Day 7] Cisco ISE Mastery Training: Configuring Certificates (Self-Signed & CA-Signed)](https://networkjourney.com/wp-content/uploads/2025/08/Day-7-Cisco-ISE-Mastery-Training-Configuring-Certificates-Self-Signed-CA-Signed.png)
Introduction TLS certificates are the backbone of secure ISE operations — they authenticate the ISE Admin GUI and portals, secure EAP/RADIUS server identity for wireless/wired 802.1X, enable pxGrid trust, and sign SAML assertions. A wrong certificate, missing CA chain, or expired cert will break 802.1X, […]
