I run a Samsung NP3005A laptop with Windows 7/SP1 connecting to the internet wirelessly via a 2003 vintage Siemens SE572 ISP provided modem router. I would welcome any initial thoughts on a behaviour recently detected in (apparently) my router.
I recently noted that my Norton firewall was blocking (Default Block SSDP rule) a continuous flood (very regular 28 per second) of messages apparently incoming from my router port1900 using UDP(17) protocol to multicast address 220.127.116.11 on my PC port 1900. 'Continuous' as detected whenever laptop is on and firewall up, regardless of whether I am logged on or not.
I have no idea how long this has been going on - these firewall reports are not ones that Norton highlights as of concern, and I do not normally look at the detailed 'no problem' reports.
I took my laptop to the library (different router and probably different ISP) - the issue did not arise.
Norton and MWB full scans both show no issues. I have not experienced any deterioration in speed or performance.
Limited enquiries/googling suggest (a) this does not seem to be a common experience; and ( that it may be due to my router broadcasting its presence to the 'local network' as part of 'plug and play'' implementation - although UpNp on my router is apparently switched 'off'' as per admin page.
I can't really claim this as a problem at present - more of a puzzle I would welcome your thoughts on.