helps other UPnP LAN hosts interoperate with the router. Leave the UPnP
option enabled as long as the LAN has other UPnP applications.
added security, it is recommended that you disable the WAN Ping Respond
option. Ping is often used by malicious Internet users to locate active
networks or PCs.
WAN speed is usually detected automatically. If you are having problems
connecting to the WAN, try selecting the speed manually.
If you are having trouble receiving multicast streams from the Internet, make sure the Multicast Streams option is enabled.