Security Experts Warn of New Way to Attack Windows

More proof that firewalls aren't always the only answer:

Security Experts Warn of New Way to Attack Windows - Microsoft Corp. issued a patch for the vulnerability in November, but the security bulletin also listed several workarounds for the flaw, including disabling the Workstation Service and using a firewall to block specific UDP and TCP ports. But penetration testers at Core Security Technologies, a Boston-based security company, discovered a new attack vector that uses a different UDP port. This attack still allows the malicious packets to reach the vulnerable Workstation Service.