CA API Gateway - Unable to obtain HTTP response - Fatal Alert received: {48}

Products

• CA API Gateway

Issue/Introduction

Problem routing to https://www.example.com/abc/123.

Error msg: Unable to obtain HTTP response from https://www.example.com/abc/123: Fatal Alert received: {48}

 

Environment

API Gateway 9.x, 10.x

Cause

The TLS protocol defined fatal alert code is 48." The error means: "Received a valid certificate chain or partial chain, but the certificate was not accepted because the CA certificate could not be located or could not be matched with a known, trusted CA.

Resolution

Check to ensure your endpoint is properly configured from a Gateway Certificate perspective

https://techdocs.broadcom.com/us/en/ca-enterprise-software/layer7-api-management/api-gateway/10-1/security-configuration-in-policy-manager/tasks-menu-security-options/manage-certificates/manage-certificate-validation.html