3776404 - ERR_SSL_VERSION_OR_CIPHER_MISMATCH error when accessing SAP BTP CF Custom Domain

Symptom

You have configured SAP Business Technology Platform (SAP BTP. URL: https://cockpit.btp.cloud.sap) Custom Domain.
Accessing the Custom domain fails with the below ERR_SSL_VERSION_OR_CIPHER_MISMATCH error.

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This site can’t provide a secure connection
technology.solutions.abc.com uses an unsupported protocol.

ERR_SSL_VERSION_OR_CIPHER_MISMATCH.

CName solutions.abc.com redirects to https://api.cf.us10-001.hana.ondemand.com

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Note that the above URL is an example.

Environment

SAP Business Technology Platform (BTP)
Cloud Foundry (CF)
SAP Custom Domain service

Product

SAP BTP, Cloud Foundry runtime and environment all versions ; SAP Build Work Zone, standard edition all versions ; SAP Business Technology Platform all versions

Keywords

CSR, Certificate Signing Request, key length, 3072 bits, 2078 bits, SAP Business Technology Platform, Custom Domain Certificates, cf custom-domain-create-key, Certificate Authority, rejection. , KBA , BC-CP-CF-SEC-DOM , Custom Domain Certificates , BC-CP-CF-SEC-IAM , UAA, Authentication, Authorization, Trust Mgmnt , Problem

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