You must be prepared to detect network intrusions. Preparation includes defining a security policy, implementing security procedures, and developing or activating the tools required to detect these intrusions. Identify and enable system and network logging mechanisms. Identify and install tools that help detect signs of intrusion. Generate information required to verify the integrity of your company's systems and data.
CERT maintains a library of material that focuses on building and implementing a security policy.
I also recommend that you find out more about cyber attacks. Virus infiltration System or key image file changes Most vendors also maintain a security advisory system to announce possible security holes and the patches to fix such violations. As the Internet, intranets, extranets, and private networks continue to grow, so does the chance of being hacked. February's Distributed Denial of Service attack was a wake-up call to everyone. Your company may not survive without it.