By default, syslog messages are exported from the devices to port 514, while NetVizura listens on the port 33514 in Linux systems and on the port 514 in Windows systems. If you use Linux systems, you need to (1) redirect syslog messages to the 33514 on NetVizura server, (2) export syslog messages to 33514 from device, or (3) change NetVizura EventLog configuration. Same applies to trap socket port.
To change NetVizura EventLog configuration go to > Settings > EventLog Settings > Configuration and under Service options change the Socket port values.