That's good to know.
With my VMG1312-B10A, I have the two tabs configured with the "Level" set as "Informational" and the "Category" set as "All".
Thanks burakkucat.
Having enabled all, the only hits were against 'Account' on the Security tab and against 'IGMP' and 'uPnP' on the 'System Log' tab.
The Account hits were DSLStats and the IGMP is almost certainly the TBB BQM monitor, which makes sense. Not sure about the uPnP hits.
Do you have all options set and then just set the level to 'Informational'?
In the interests of knowledge improvement, I'll PM you my external IP address so you can try a nmap scan. Let me know when you do it and I'll let you know where it's picked up.