Protect yourself from denial of service attacks: UPnP weakness in Windows XP

[ben2ong2]

You might have heard of Denial of Service attacks . Recently this news covered media headlines. Microsoft has provided a fix for it. You can read complete details at You are not allowed to view links. Register or Login But in brief few registry tweaks can save the day for You in unlikely case of You being the target .1. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Control Point and add "DownloadScope" key and put a value of 0 to 3. Here is the description of these values:0 - on the same subnet 1 - same subnet or at a private address 2 - same subnet or at a private address or within 4 hops 3 - anywhere 2. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SSDPSRV\Parameters and add key "TTL" and sets its value to max number of rounter hops allowed in the PnP device search on Internet .