Security and Security Architecture of Cisco IOS universal NETWORK SERVICE

Cisco IOS universal network service: Security

Security Introduction

Cisco considers security issues from several aspects. In enterprise equipment, security is generally based on security protection, closed-circuit television and card key entry systems. Companies can rest assured that their physical and intellectual assets will be protected. Cisco's security solution allows enterprises to expand this model by making policy-based components and IOS security architecture. After more than 10 years of technological innovation and development, the IOS security system provides the foundation for enterprise security policies. IOS security is based on multiple overlapping solutions that maintain the security integrity of enterprises.

Access Security and work efficiency

Enterprises must decide when to compromise user access and productivity with security measures that may be viewed as restricted by users. One side is access and work efficiency, and the other side is security. A good design aims to provide a balance while adding as few restrictions as possible from the user's perspective. Some very reasonable security measures, such as encryption, do not limit access and efficiency. On the other hand, poor security plans may reduce user efficiency and performance. How many access and efficiency risks do enterprises face in their security maintenance efforts?

Cisco IOS Security Architecture

Cisco IOS Security Architecture

Firewall

Cisco recommends that customers use ethics to define their security policies to address this issue. Once these policies are defined, multiple security components can be used to meet policy requirements. Components of the Cisco IOS security system include firewall, access management, host security, and encryption.

In the past few years, routers are generally the only thing between an enterprise's smart assets and its network. Routers are uniquely located, designed, and equipped to control and report data streams in various levels of Open System Interconnection, such as the OSI reference model. With the improvement of network accessibility and functions, and the cost-effective remote access device connection, the risk level is gradually reduced. If a vro is scheduled to provide peripheral network security, it usually refers to a "Firewall Router ". The access control directory ACL is maintained in the Firewall Router. The main function of ACL is to provide filtering. IOS Security provides a large number of tools to help report illegal access due to ACL violations ):

ACL violation Accounting
ACL violation disco: over time, enterprises need a historical perspective to figure out which ACLs have been tested. This knowledge provides network administrators with an understanding of how intruders try to enter a corporate network. ACL violation accounting provides source and destination address information, source and destination port numbers, and the number of packages.

ACL violation logs
ACL violation logging: In today's online world, powerful firewall functions are insufficient to solve the problem. network administrators need a centralized report option. In the past, network administrators did not know they had been attacked by hackers before they suffered any damage. The only available early reporting tool is to scan host log files. Although this is still an excellent security diagnostic method, it cannot be well expanded. The ACL reporting tool provides management personnel with help by providing violation information and network perimeter prevention. IOS contains ACL violation logs, which provide regular system log records for management personnel, so that ACL violations can be confirmed in real time.

Network Address Translation
Network Address Translation (NAT): The number of networks connected to the global Internet has increased dramatically, resulting in the rapid consumption of available connections in the future. The World Wide Web has contributed to this depletion, and the Internet is growing at a rate of 30% to 50% every year. According to the current estimation, the remaining ne Internet addresses will be used up in three to ten years.