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Free Tool Scans Sites For Threats: Page 2 of 3

When a user enters a URL in LinkScanner, the tool scans the requested page for threats and exploits, then reports back on what it found. "I think it's most useful for checking out links people send you in e-mail, Weltzien said. "Even though you've told them not to, they still do."

However, the tool doesn't warn users of all potentially risky sites. Several sites tested by TechWeb that were identified by Firefox 2.0 Beta 1 as likely spoofed phishing URLs, were passed by LinkScanner.

"We're not going terribly deep into the site," admitted Chiarella. "There are number of ways you can crawl a site, and we're doing it relatively superficially." LinkScanner scans only the page entered, not any secondary pages or sites linked to from the URL. "We could go to the entire depth of the site, but that would take some time," said Chiarella. "People have about a 30 second wait tolerance."

In TechWeb's tests, LinkScanner took about 10 seconds to return its findings.

LinkScanner is based on an SDK for SocketShield, a stand-alone exploit interceptor that the company released in final form last month. It's also tied to the same intelligence network Exploit Prevention uses to feed data to SocketShield.