An integrated collection of tools for network monitoring and control.
Single operator interface
Minimal amount of separate equipment. Software and network communications capability built into the existing equipment
SNMP key elements:
Management information base
Network Management protocol
Get, Set and Notify
We can say that the functions performed by a network management system can be divided into five broad categories: configuration management, fault management, performance management, security management, and accounting management.
Intrusion detection is not for the faint at heart. But, if you are a network administrator chances are you're under increasing pressure to ensure that mission-critical systems are safe--in fact impenetrable--from malicious code, buffer overflows, stealth port scans, SMB probes, OS fingerprinting attempts, CGI attacks, and other network intruders.
LANs, WANs, WLANs are known as edge networks
May be contained within businesses or homes
Needs to be protected from the rest of the Internet!
Cannot stop malicious packets from getting into an edge network
Can determine whether an incoming IP packet comes from a trusted user
However, not all host computers have resources to run authentication algorithms
Host computers managed by different users with different skill levels.
Security concepts are organized based on business needs, as opposed to tech-nological similarity. We’ve tried to focus on how these concepts relate in terms of practical business functionality. For example, network monitoring is discussed in Part 1, "Managing Security " rather than in a section on intrusion detection. For people with a technical background, this method of organization may seem strange. But one of our goals is to change the way people think about security. As we’ll say many times throughout the book, security is not a technological issue; it’s a business
This chapter include objectives: Describle the principles of secure network design, describle threat identificaion and risk analysis, describle risk managenment and risk avoidance, describle the Cisco SecureX architecture, describle operation security,...
This chapter describes how to securely implement the management and reporting features of Cisco IOS devices. It discusses technologies surrounding network management, such as syslog, Network Time Protocol, Secure Shell, and Simple Network Management Protocol.
Appendix B - Designing policies for managing networks. This appendix offers guidelines for ensuring that network administrators manage networks in a secure manner. The following topics are covered in this module: Analyzing risks to managing networks, designing security for managing networks.
Appendix C: Designing an operations framework to manage security. This appendix explains how to create a framework to ensure security of a network as the network changes and as the security requirements of the organization change.
Wireless security is the prevention of unauthorized access or damage to computers using wireless networks. The most common types of wireless security are Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA). WEP is one of the least secure forms of security.Many laptop computers have wireless cards pre-installed. The ability to enter a network while mobile has great benefits. However, wireless networking is prone to some security issues. Crackers have found wireless networks relatively easy to break into, and even use wireless technology to crack into wired networks......
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In an age when our society relies so heavily on electronic communication, the need
for information security is imperative. Given the value and confidential nature of the
information that exists on today’s networks, CIOs are finding that an investment in
security is not only extremely beneficial but also absolutely necessary. Corporations
are realizing the need to create and enforce an information security policy.
In addition to an explosion of touch points, we are faced with an infinitively
complex and rapidly changing web of networks, applications, systems, client software,
and service providers. Under these circumstances, absolute security cannot be guaranteed
since it’s impossible to test the security implications of every configuration combination
of hardware and software under every set of conditions.
OpenVPN is a powerful, open source SSL VPN application. It can secure site-to-site connections, WiFi and enterprise-scale remote connections. While being a full-featured VPN solution, OpenVPN is easy to use and does not suffer from the complexity that characterizes other IPSec VPN implementations. It uses the secure and stable TLS/SSL mechanisms for authentication and encryption. This book is an easy introduction to this popular VPN application.
Over the last ten years, the impact of wireless communications on
the way we live and do business has been surpassed only by the impact
of the Internet. Cell phones, pagers, and wireless Personal Digital
Assistants (PDAs) have become so commonplace in our lives that it is
easy to forget that ten years ago, they were a rarity.
One of the keys to understanding Cisco is the OSI model. The OSI model permits
people to understand how internetwork works and it serves as a guideline or framework
for creating and implementing network standards, devices, and internetworking schemes.
Some of the advantages of the OSI model include:
• It allows for the breaking down of complex operation into simple elements;
• Enables engineers to specialize the design and development of modular elements;
• It provides standards for plug and play and multivendor integration....
This Solution Reference Network Design (SRND) provides design and implementation
recommendations fo r deploying security services in the data center. This document discusses security
topologies that include both appliance and integrated devices.
This publication provides solution guidelines for enterprises implementing Data Centers with Cisco
Explanation: Point-to-Point Protocol (PPP) provides router-to-router and host-network connections over
synchronous and asynchronous circuits. PPP was designed to work with several network layer protocols,
including IP and IPX. It also has built in security features such PAP (Password Authentication Protocol) and
CHAP (Challenged Handshake Authentication Protocol).