From gbhackers.com
A new browser extension published dubbed Behave! that warns the user if the website tries to perform a port scan or launch DNS based attacks.
The web sites port scanning issue came into light after a script found on the eBay website that performs local port scans on a user computer to check for remote access.
The port scanning conducted by LexisNexis’ ThreatMetrix fraud protection script that used to detect fraudulent purchases.