TurnTide buy is Symantec's second spam-related acquisition in the past month Symantec Corp. has snatched up six-month-old router vendor TurnTide Inc. for an undisclosed sum.TurnTide, based in Conshohocken, Pennsylvania, sells a spam-filtering router called the Anti-Spam Router that identifies and blocks Internet traffic from “abusive senders,” according to the company’s Web site.The acquisition, which was confirmed by a Symantec spokesman on Monday, is Symantec’s second spam-related acquisition in the past month. On June 22 the company finalized a $370 million cash acquisition of San Francisco-based Brightmail Inc. TurnTide was founded by entrepreneur Joshua Kopelman, who founded online retailer Half.com in July 1999. Half.com was purchased by eBay Inc. a year later in a stock transaction. SecurityTechnology IndustryMalware