TELIA BLOCKS SPAM-SENDING ZOMBIE PCS.(Brief Article)

Tech Europe, November, 2003

TeliaSonera, the leading telecommunications group in the Nordic and Baltic regions, will start to immediately block Internet traffic to and from computers that send junk email or spam, the company announced on November 4. In order to prevent the rapid spread of spam and virus mails, the company will block all Trojan-infected PCs without warning. TeliaSoneria is the first ISP in Europe to take such drastic measures.

So far, most ISPs have only blocked Internet traffic to certain PC ports. In the UK NTL last month started blocking port 135 traffic on its Internet service. Port 135 is generally used for connections to Microsoft Exchange servers on corporate networks, but it was also compromised by the Welchia and Blaster worms. A PC that is infected with a Trojan...