Why Is Core Receiving HTTP 403 or Timeout Errors when downloading engine updates from OCM?

Issue

You may see log messages similar to the following in your Core system:

[WARNING] 2025.04.10 18:23:40.925: (common.communication) Error while downloading file, url='QUrl("http://XXXXX:9000/console/core/metadescriptor?version=5.13.3&deployment=XXXXX&serial=0")', http_status='0', error='UnknownNetworkError', errorDetails='Connection timed out' [msgid: 485] [ERROR ] 2025.04.10 18:23:40.925: (common.update) Error parsing metadescriptor, message='Could not download metadescriptor' [msgid: 282] [WARNING] 2025.04.10 18:23:51.796: (common.communication) Error while downloading file, url='QUrl("http://XXXXX:9000/console/core/metadescriptor?version=5.13.3&deployment=XXXXX&serial=0")', http_status='403', error='ContentAccessDenied', errorDetails='Error transferring http://XXXXX:9000/console/core/metadescriptor?... - server replied: Forbidden' [msgid: 485]

Cause

These messages usually mean that Core is having trouble connecting to OCM (OPSWAT Central Management). It may be caused by:

Network timeout or proxy issues
Port 9000/tcp being blocked
Restrictions in your firewall or proxy

Solution

Please check the following:

Proxy or Network Settings Make sure your network allows Core to connect to the OCM server. If you're using a proxy, verify that it allows traffic to the OCM address on port 9000/tcp.
Firewall Rules Ensure port 9000/tcp is open between Core and OCM. This is required for downloading updates and descriptors.
More Info on Ports For a full list of ports used by OCM, see the documentation here: Recommended System Requirements - OPSWAT Central Management v7 - Legacy.

Support:

If Further Assistance is required, please proceed to log a support case or chatting with our support engineer.

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