How to protect your network from the Plug and Play exploits

Security experts offer practical advice to reduce the risk of your company's networks being infected by a variety of malicious code now circulating.


To protect networks against the Plug and Play attacks currently being exploited, security experts recommend IT professionals take steps that include:
  • Patching systems quickly;
  • Blocking TCP ports 139 and 445 at the firewall;
  • Eliminating NULL sessions;
  • Using access control lists (ACLs) to restrict traffic to worm-specific ports and destinations;
  • Updating IDS/IPS signatures;
  • Using a personal firewall such as the Internet Connection Firewall, which is included with Windows XP SP1;
  • Enabling advanced TCP/IP filtering on systems that support the above feature; and
  • Blocking affected ports using IPsec on the affected systems.

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