SAP S/4HANA Administration · Authentication, SSO & Communication Security

After an upgrade, RFC callbacks that used to work are suddenly blocked. Which hardened default is responsible, and how do you build the allowlist it needs?

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More in Authentication, SSO & Communication Security

An older integration design reaches for SAP logon tickets for cross-system SSO. Why is that the wrong call today, and what replaces them?

You're configuring SAP GUI SSO with Kerberos and jump straight to the Kerberos setup. Why does it fail, and what had to come first?

On the SAP Web Dispatcher, which PSE holds the cert for incoming HTTPS and which is for the hop out to the backend — and what symptom do you get if you swap them?

Kerberos SSO to your SAP system worked for weeks, then every user's SSO fails at once. What AD-side requirement was almost certainly violated?

Before you put a freshly configured SAP Web Dispatcher into the request path, how do you confirm it'll actually reach the backend instead of finding out from failing user traffic?

Your X.509 cert encrypts traffic whether it's self-signed or CA-signed, so why does production HTTPS still demand the CA-signed one?

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