Observed in 3rd party Firewall monitoring log files that during the Test Connection, the PC Client is trying to reach the Engine Portal in port 54322, instead of 54323 (Image I/O Proxy) Confirmed in engine-config, that ImageTransferProxyEnabled is set to False. SOLUTION To confirm that the ImageTransferProxyEnabled is set to "false", login in the OLVM Engine Host/VM as root, and execute the following command: # engine-config -g ImageTransferProxyEnabled Picked up JAVA_TOOL_OPTIONS: -Dcom.redhat.fips=false ImageTransferProxyEnabled: false version: general <<< set to false To enable the Image I/O Proxy and restart the ovirt-engine and ovirt-imageio services perform the following as root: # engine-config -s ImageTransferProxyEnabled=true Picked up JAVA_TOOL_OPTIONS: -Dcom.redhat.fips=false ImageTransferProxyEnabled: true version: general <<< set to true # systemctl restart ovirt-engine # systemctl restart ovirt-imageio