I am running PRTG version 188.8.131.5299 on a Windows 2008 R2 server. I have defined a custom NetFlow v9 sensor for data coming from a cisco 2911 router. The sensor works fine overall. I have a number of tcp and udp ports defined, plus icmp. I also have the standard "other tcp" and "other udp" catchalls.
The problem is that I am seeing a large amount of traffic in the toplist categorized as "Other". To troubleshoot I went into the sensor settings and enabled "Log Stream Data to Disk - Only for the 'Other' channel." Now when I go to \programdata\paessler\prtg network monitor\streamlog" I see a new "stream sensor" file has been created, but the file contains only one line - the column headers. There is no data being logged there. But the sensor's Toplist shows that there have been several megabytes of data categotized as "Other" since I turned on Stream Logging. Did I miss a step somewhere?