Network Security

Network security has become a major issue in the environment of internet technology into existence.

Firewalls are essential.

To assess risk ask the following questions:

• What is at risk?
• What is its value?
• What are the threats?
• What is the probability of occurrence?

• Single point of failure
• Loose security policies
• Support protection
• Limitation of technology
• False sense of security
• Weak encryption
• Latency

• Open architecture
• Packet filteration
• Default to denial
• Auditing capabilities
• Access control
• Logging capabilities
• Intrusion detection

• Extended user authentication
• Secured subnets
• Strong encryption
• Network management systems
• Secure back-up
• Statefull inspection
• Real-time traffic monitoring and alerting system
• Device management
• Secure tunneling
• Application layer traffic inspection

There are various softwates available in the market which I have used and they might be of great help to you as well.

Just have a look 

Nsauditor Network Security Auditor

Is a network utility package which includes more than 45 network tools  and utilities. It combines Network Security and Vulnerability Scanning,Network Monitoring and Network Inventory, it allows monitoring network computers for possible vulnerabilities, checking enterprise network for all potential methods that a hacker might use to attack it and create a report of potential problems that were found.