I just plugged in a couple tp-link wirless access points and found that while they work fine, I am now seeing traffic going from their internal ip's to a 188.8.131.52 which is nothing on my network. Researching that ip, it looks like it might be related to ssdp? I looked through all the settings and see nothing about ssdp. I also turned off everything I could find in the ap - upnp, firewall, dhcp, etc. (I am only using it as a basic wireless access point on to the lan).