Network Denial-of-Service Attack

Microsoft Office Communications Server 2007 and Microsoft Office Communications Server 2007 R2 will reach end of support on January 9, 2018. To stay supported, you will need to upgrade. For more information, see Resources to help you upgrade your Office 2007 servers and clients.

The denial-of-service attack occurs when the attacker prevents normal network use and function by valid users. By using a denial-of-service attack, the attacker can:

• Send invalid data to applications and services running in the attacked network to disrupt their normal function.

• Send a large amount of traffic, overloading the system until it stops responding or responds slowly to legitimate requests.

• Hide the evidence of the attacks.

• Prevent users from accessing network resources.