Make the network secure
Secure the network by implementing security solutions (implement authentication, encryption,
firewalls, intrusion prevention, and other techniques) to stop or prevent unauthorized access or
activities and to protect information and information systems.
Step 3. Monitor and respond.
This phase detects violations to the security policy. It involves system auditing and real-time
intrusion detection and prevention solutions. This also validates the security implementation in Step
2.
Step 4. Test.
This step validates the effectiveness of the security policy through system auditing and vulnerability
scanning and tests existing security safeguards.
Step 5. Manage and improve.
Use information from the monitor and test phases to make improvements to the security
implementation. Adjust the corporate security policy as security vulnerabilities and risks are
identified. Manage and improve corporate security policy.
Figure 1-6. The Security Wheel
Lessons learned from Steps 2 through 5 should always be reflected back to the corporate security policy in Step
1, so that the high-level security expectations are being met. This should be an ongoing process, a continuous
life cycle!
Summary
This chapter gave an overview of network security and discussed the challenges of managing a secured network
infrastructure.
Pages:
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67