advantages of dynamic virtual private network

... security of ATM or Frame Relay networks. 3.4. Label Spoofing Similar to IP spoofing attacks, where an attacker fakes the source IP address of a packet, it is also theoretically possible to spoof ... [Page 4] Network Working Group M. Behringer Request for Comments: 4381 Cisco Systems Inc Category: Informational February 2006 Analysis of the Security of BGP/MPLS IP Virtual Private Networks ... IP virtual private network (VPN) services, the security of the BGP/MPLS IP VPN architecture is of increasing concern to service providers and VPN customers. This document gives an overview of...

... SUMMARY (CONTINUED)  VPN types  Site­to­site  Client­to­site  Encapsulation encloses one packet within  another   Conceals the original information  VPN protocols  Secure Shell (SSH)  Socks version 5  Point­to­Point Tunneling Protocol (PPTP)  Layer 2 Tunneling Protocol (L2TP) 40 Virtual Private Network (VPN)  29 BIếN ĐổI ĐÓNG GÓI TRONG VPN  (ENCAPSULATION)  Các buớc trong tiến trình VPN   Đóng gói (Encapsulation)  Mã hoá (Encryption)  Xác thực (Authentication)  Encapsulation  Đóng gói dữ liệu và các thông số khác nhau  Ví dụ như IP header  Bảo vệ tính nguyên vẹn dữ liệu 15 ... SUMMARY (CONTINUED)  IPSec/IKE  Encryption makes the contents of the  packet unreadable  Authentication ensures participating  computers are authorized users  Kerberos: strong authentication system  VPN advantages  High level of security at low cost  VPN disadvantages  Can introduce serious security risks 41 ... ENCRYPTION SCHEMES USED BY  VPNS  Triple Data Encryption Standard (3DES)  Used by many VPN hardware and software  3DES is a variation on Data Encryption Standard  (DES)  DES is not secure  3DES is more secure  Three separate 64­bit keys to process data  3DES requires more computer resources than DES 30 WHY ESTABLISH A VPN?  VPN combinations  Combining VPN hardware with software adds  layers of network security  One useful combination is a VPN bundled with a  firewall  VPNs do not eliminate the need for firewalls  Provide flexibility and versatility 13 ...

... - In Luận văn, Tiểu luận : 6.280.688 Lý thuyết.  I. Tổng quan về mạng riêng ảo VPN (Virtual Private Network) .  II. VPN và bảo mật internet VPN.  III. Thiết kế VPN I. Tổng quan về mạng riêng ... tiết kiệm được chi phí và thời gian. VPN ra đời đáp ứng tất cả các yêu cầu trên Cụm từ Virtual Private Network gọi là mạng riêng ảo- VPN được khởi sự năm 1997. Mục đích mong muốn của công nghệ ... Client 17 Internet VPN Central Site Mobile Customer Telecommuter POP Cisco VPN Clients Microsoft Win 2000 (IPSec) Microsoft Win 9x/NT (PPTP) CH số 11 - B1 - ĐH KTQD Chuyên Photocopy - Đánh máy - In Luận...

... tunnel về mạng của họ. I. Giới Thiệu VPN 1. Khái niệm - Mạng riêng ảo hay VPN (viết tắt cho Virtual Private Network) là một mạng dành riêng để kết nối các máy tính của các công ty, tập đoàn hay các ... lại đóng vai _________________________________________________________________________ VIRTUAL PRIVATE NETWORK (VPN) Nhóm 18 Lớp: DHTH3 GV: Th.s Nguyễn Hòa Danh sách: 1. Đặng Hồng Hải 2. Hồ Thanh ... cho mỗi vị trí một giao thức đặc trưng chỉ định trong gói IP header, tạo một đường kết nối ảo (virtual point- IV. Kết Luận - Hiện nay xu hướng các công ty có nhiều chi nhánh là phổ biến, do...

... firewalls in a single device. Virtual Private Networking Explained Virtual Private Networks solve the problem of direct Internet access to servers through a combination of the following fundamental ... (NetBIOS traffic in the case of NT networks; NFS, Telnet, or X Windows in the case of Unix networks; AppleTalk in the− case of Macintosh networks; and NCP in legacy NetWare networks) from Internet ... internal network. As an example, consider two IP networks linked by a router. Both are /24 (class C) IP subnets, one with the network address of 10.1.1 and the other with the network address of 10.1.2....

... public internetwork in a manner that emulates the properties of a point-to-point private link. The act of configuring and creating a virtual private network is known as virtual private networking. ... split Microsoft VPN Overview White Paper 19 USER ADMINISTRATION A virtual private network (VPN) is the extension of a private network that encompasses links across shared or public networks like ... portion of the connection in which the private data is encapsulated is known as the tunnel. The portion of the connection in which the private data is encrypted is known as the virtual private network...

... Thí nghiệm TTDL & Mạng máy tính Trang 55 9. Nhấn Next. Trên trang Network Connection, chọn Virtual Private Network connection. 10. Nhấn Next. Trên trang Connection Name, gõ VPN Client ... TTDL & Mạng máy tính Trang 62 4. Trên trang Connection type chọn Connect using virtual private networking (VPN). 5. Nhấn Next. Trên trang VPN Type chọn Point-to-Point Tunneling Protocol ... phỏng & Truyền số liệu Thí nghiệm TTDL & Mạng máy tính Trang 49 BAØI 3 : VPN (VIRTUAL PRIVATE NETWORK) I. Lý thuyết chung cho VPN ã VPN cung cp kt ni mng vi khong cách dài. Về một...

... takes place: Virtual Private Networks Administration Guide Version NGX R65 701675 March 18, 2007 Table of Contents 5 Contents Preface Who Should Use This Guide 20 Summary of Contents 21 Section ... 37 Understanding the Terminology A number of terms are used widely in Secure VPN implementation, namely: ãVPN. A private network configured within a public network, such as the Internet ã VPN Tunnel. ... services of data on a private or public network. IKE (Internet Key Exchange) is a key management protocol standard. IKE enhances IPSec by providing additional features, flexibility, and ease of configuration. ...

... stolen.) Figure 22-5. You're on your way to joining the corporate network from thousands of miles away. Virtual private networking is ideal for the paranoid (because it's very secure) ... Click Network. Click the + button below the list of connections at the left side. The "Select an interface" sheet appears. 2. From the pop-up menu, choose VPN. 22.5. Virtual Private ... perform this job primarily with the aid of a super-secure firewall that seals off the company's network from the Internet. So how can you tap into the network from the road? One solution is...

... cho các học viên lớp MCSA - www.athenavn.com Cách thiết lập VPN (Virtual Private Networks) Client - Phần II Virtual Private Networks (VPN) hay gọi theo tiếng Việt là Mạng Riêng Ảo, cho phép ... ảnh minh họa 1. Right click vào My Network Places, chọn Properties, double click vào Make New Connection, sau đó click Next 2. Chọn vào Connect to private network through the Internet theo...

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... term virtual private dialup network (VPDN) instead of VPN. Enables VPN. Configuring Virtual Private Networks Verifying VPN Sessions DNC-176 Cisco IOS Dial Services Configuration Guide: Network ... 4500-M edge router Frame Relay data network Serial lines 4 TI PRI lines PSTN DNC-145 Cisco IOS Dial Services Configuration Guide: Network Services Configuring Virtual Private Networks This chapter describes ... both routers. Configuring Virtual Private Networks VPN Technology Overview DNC-152 Cisco IOS Dial Services Configuration Guide: Network Services Traditional dialup networking services only support...

... model is deployed? mp900725.eps 87050021 07/15/00 steve gifford Virtual Networks Virtual Private Networks Virtual Dial-up Networks Virtual LANs Overlay VPN Peer-to-Peer VPN Layer 2 VPN Layer 3 ... 138 Chapter 8: Virtual Private Network (VPN) Implementation Options networks that are mostly IP-based, thus increasing the acquisition and operational costs of such a network. Peer-to-peer ... no knowledge of the internal structure of the customer network. Figure 8-6 shows the routing topology of the VPN network in Figure 8-5. Figure 8-6 Routing in Sample Overlay VPN Network The...

... device ã Hybrid ã combination of both ã mesh of hubs ã star of hubs Virtual Private Networks (VPNs) ã Used to connect two private networks together via the Internet ã Used to connect remote users to a private network ... NIAP Goals ã The long-term goal of NIAP is to help increase the level of trust consumers have in their information systems and networks through the use of cost-effective security testing, ... versions of IPSec+IKE work together ã make sure that remote clients software works with your firewall VPN ã Virtual Private Networks CS-480b Dick Steflik ...