Researchers studying botnets have reported an increase in attacks on Georgian Web sites, including that of the country's president, within the last two weeks. While the attacks -- Web site defacement and denial-of-service packet floods -- are reminiscent of the Internet attacks waged against Estonia in May 2007, Jose Nazario, security researcher for Arbor Networks, said that he's seeing evidence that Georgia is apparently fighting back, attacking at least one Moscow-based newspaper site.