"Connection Refused" accessing OData QueryBuilder in DX NetOps Performance Management

Products

• Network Observability

Issue/Introduction

When attempting to access the OData QueryBuilder 4 UI via the DX NetOps Portal, the connection fails with a "Connection Refused" error. This typically occurs when using the default documented URL: http://[Portal_Hostname]:8181/pc/odataquery

Users may also report that trying other common ports (e.g., 8581, 8081) results in the same error.

Environment

 

• DX NetOps Performance Management Portal
• HTTPS / SSL configured for the Portal UI

 

Cause

The default OData Query port 8181 is specifically for HTTP (unencrypted) connections. If the DX NetOps Portal has been configured for HTTPS, the OData service automatically shifts to the secure listener port 8182.

 

Resolution

Update the OData QueryBuilder URL to use the HTTPS protocol and the correct port (8182).

1. Open a web browser.
2. Navigate to the following URL, replacing [Portal_Hostname] with your server's FQDN: https://[Portal_Hostname]:8182/pc/odataquery
3. Ensure that any intermediate firewalls allow traffic on port 8182 between your client machine and the Portal server.

Standard Port Reference:

 

 

Protocol	Portal UI Port	OData Query Port
HTTP	8181	8181
HTTPS	8182	8182

Additional Information

If you still receive "Connection Refused" on port 8182:

• Verify that the Performance Center services are running.
• Check the /opt/CA/PerformanceCenter/DM/logs/DMService.log for errors initializing the OData/OpenAPI listeners.