HOW DOES NETWORK ADDRESS TRANSLATION NAT INCREASE FIREWALL EFFECTIVENESS

Phần I:Giới thiệu tổng quan về NAT (Network Address Translation) I : NAT (Network Address Translation) là gì ?NAT giống như một router, nó chuyển tiếp các gói tin giữa những lớp mạng khác nhau trên một mạng lớn. NAT dịch hay thay[r]

The unrestricted packet communication supported by
the Internet offers immense flexibility to the endhosts
in how they use the network. This flexibility has en
abled the deployment of new applications such as the
web long after the IP protocol has been standard
ized and has contributed significantly[r]

Chương 1. Internet kết nối liên mạng với giao thức IP81.1Quá trình hình thành và phát triển mạng Internet81.1.1ARPANET91.1.2NSFNET91.1.3Thương mại hóa mạng Internet101.1.4Internet thế hệ 2111.2Mô hình TCPIP kết nối liên mạng (internetworking)121.2.1Internetworking121.2.2The TCPIP protocol layers[r]

R-X(config)# access-list 1 permit 100.0.X.0 0.0.0.255 - Define a pool of global addresses to be allocated as needed R-X(config)#ip nat pool <name> 10.2.0.12X 10.2.0.13X netmask 255.255.255.0 - Dynamic translation uses the addresses permitted by the access list to be trans[r]

LỜI NÓI ĐẦU Trong công cuộc đổi mới không ngừng của khoa học kỹ thuật công nghệ, nhiều lĩnh vực đã và đang phát tri ển vượt bậc đặc biệt là lĩnh vực Công nghệ thông tin. Thành công lớn nhất có thể kể đến là sự ra đời của chiếc máy tính. Máy tính được coi là một phương tiện trợ giúp đắc lực cho con n[r]

In developing the virtualization of the CPU, we focused on a general mechanism known as limited direct execution (or LDE). The idea behind LDE is simple: for the most part, let the program run directly on the hardware; however, at certain key points in time (such as when a process issues a system ca[r]

Implementing Intrusion Prevention
ZeroDay Exploits
Worms and viruses can spread across the world in minutes.
Zeroday attack (zeroday threat), is a computer attack that tries to exploit software vulnerabilities.
Zerohour describes the moment when the exploit is discovered.


ZeroDay Exploits
How do[r]

AbstractGraphics detection and recognition are fundamental research problems in document image analysis and retrieval. As one of the most pervasive graphical elements in business and government documents, logos may enable immediate identification of organizational entities and serve extensively as a[r]

Data gathering is a fundamental task of WSN. It aims to collect sensor readings from sensory field at predefined sinks (without aggregating at intermediate nodes) for analysis and processing. Research has shown that sensors near a data sink deplete their battery power faster than those far apart due[r]

Căn bản về TCP/IPTCP/IP (Transmission Control Protocol/Internet Protocol) là một bộ protocols (giao thức) được thiết kế để đạthai mục tiêu chính:1. Cho phép truyền thông qua các đuờng dây của mạng rộng (Wide Area Network - WAN). 2. Cho phép truyền thông giữa các môi trường đa dạng. Do đó hiểu[r]

Managing a Secure Network
Secure EndtoEnd Network Approach
Secure network devices with AAA, SSH, rolebased CLI, syslog, SNMP, and NTP.
Secure services using AutoSecure and onestep lockdown.
Protect network endpoints, such as workstations and servers, against viruses, Trojan Horses, and worms with[r]

.. .Domesticating or Foreignizing? Translations of Titles and Honorifics in Hong Lou Meng LIU ZEQUAN (B.A (HTU); Postgraduate Dip (NTU); M.A (HUST, NUS) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR... identifying and signposting a term of address in its context and determining its position within the[r]

(Adapted from Oxford 1990:18-20)- 15 -We can see the details of learning strategies from the above table. In this study, we only chose five specific strategies of CS to apply in the experiment including Formally practicing with sounds and writing systems; Notes-taking; Analyzing expressions; Highlig[r]

Communication of confidential data over the internet is becoming more frequent every day. Individuals and organizations are sending their confidential data electronically. It is also common that hackers target these networks. In current times, protecting the data, software and hardware f[r]

Securing Network DevicesCisco Integrated Services Routers G2Cisco has a new Series of 2nd Generation Routers.G2 ISRs have integrated Gigabit Ethernet interfaces.Enforcing Perimeter Security PolicyRouters are used to secure the network perimeter.Scenario 1:The router protects the LAN.Scenario 2:The r[r]

Tạo mạng ảo bằng VMware WorkstationVMware Workstation là phần mềm tạo máy ảo nổi tiếng nhất hiện nay. Ngoài chức năng tạo máy ảo, VMware còn cho phép người dùng tạo ra các mạng ảo giữa máy thật, các máy ảo và mạng ngoài của máy thật. Bài viết này sẽ giúp bạn hiểu về mạng ảo trong VMware Workstation[r]

Bus-Oriented SystemBus-Oriented System19.8Silberschatz, Galvin and Gagne ©2005Operating System Concepts – 7th Edition, Jan 1, 2005Features of Real-Time KernelsFeatures of Real-Time Kernels■Most real-time systems do not provide the features found in a standard desktop system.■Reasons include●Real-tim[r]

Use of opportunistic connectivity together with the delay tolerant network (DTN) architecture provides
an economically viable alternative to traditional ICT solutions for communication challenged areas. Here,
the remote village scenario is commonly established as a motive in terrestrial DTN research[r]

(BQ) Part 2 book TCPIP essentials A LabBased approach has contents TCP study, tulticast and realtime service; the Web, DHCP, NTP and NAT; network management and security.
(BQ) Part 2 book TCPIP essentials A LabBased approach has contents TCP study, tulticast and realtime service; the Web, DHCP, NT[r]