Cannot connect to REST endpoint
Troubleshoot problems with REST connectivity by validating the REST endpoint.
You might see java.net.ConnectException: Connection refused in the log file.
The client firewall security is blocking the outgoing request.
Resolving issues with REST network connectivity
Confirm that you are using the correct port for the correct protocol.
Validate that you can reach the endpoint by using telnet, cURL, or Postman.
If you can reach the endpoint outside of Pega Platform, determine whether the external system firewall is causing the issue.