3312521 - HTTP 403 Forbidden due to Access Policy, while calling On-Premise system from Cloud Integration via Cloud Connector

While sending HTTP request from Cloud Integration to On-Premise system via Cloud Connector (Proxy Type: On-Premise), below error is seen in Mesasge Processing Log:

• HTTP response '403: Forbidden. Access denied to resource <subdirectories> on system <host:port>. In case this was a valid request, ensure to expose the resource correctly in your cloud connector.' when communicating with <URL>
• HTTP response '403: Forbidden. Access denied to system <host:port>. In case this was a valid request, ensure to expose the system correctly in your cloud connector.' when communicating with <URL>
• Access denied to resource <subdirectories> on system <host:port>. In case this was a valid request, ensure to expose the resource correctly in your cloud connector.
• Access denied to system <host:port>. In case this was a valid request, ensure to expose the system correctly in your cloud connector.
  

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

• SAP Integration Suite
• SAP Business Technology Platform
• Cloud Integration

Cloud Connector, HTTP 403, Forbidden, Access Control, ACL, Access Policy, Cloud Integration, SAP Integration Suite, SAP Cloud Platform Integration, Cloud Platform Integration, SAP CPI, CPI, SCPI, HANA Cloud Integration, HCI, SAP HCI, tenant, iFlow, Integration Flow , KBA , LOD-HCI-PI-RT , Integration Runtime , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , Problem