Ngày tải lên: 07/04/2014, 15:38
Virtual Private Networks
... most modern VPN systems are combined with firewalls in a single device. Virtual Private Networking Explained Virtual Private Networks solve the problem of direct Internet access to servers through ... passwords. The solution to this problem is Virtual Private Networks (VPNs). VPNs are a cost effective way to− extend your LAN over the Internet to remote networks and remote client computers. VPNs ... encrypts its private key using the random number and sends it to the remote host. The remote host decrypts the private key using its kept random number, and compares the private key to its private...
Ngày tải lên: 29/09/2013, 13:20
Virtual Private Networks
... etc.). Overview 44 Figure 2-2 IKE Phase II Once the IPSec keys are created, bulk data transfer takes place: Virtual Private Networks Administration Guide Version NGX R65 701675 March 18, 2007 Table of Contents 5 Contents Preface ... Period 81 Configuring OCSP 82 Chapter 4 Introduction to Site to Site VPN The Need for Virtual Private Networks 84 Confidentiality 84 Authentication 84 Integrity 84 The Check Point Solution for ... which supports several standards to provide authentication and encryption services of data on a private or public network. IKE (Internet Key Exchange) is a key management protocol standard. IKE...
Ngày tải lên: 06/11/2013, 00:15
... 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 ... Properties, double click vào Make New Connection, sau đó click Next 2. Chọn vào Connect to private network through the Internet theo hình dưới đây. 3. Nếu bạn chưa kết nối với internet...
Ngày tải lên: 21/12/2013, 20:15
Tài liệu Configuring Virtual Private Networks pdf
... Cisco IOS command syntax uses the more specific term virtual private dialup network (VPDN) instead of VPN. Enables VPN. Configuring Virtual Private Networks Verifying VPN Sessions DNC-176 Cisco IOS ... Configuration Guide: Network Services Configuring Virtual Private Networks This chapter describes how to configure, verify, maintain, and troubleshoot a Virtual Private Network (VPN). It includes the following ... be sent to the AAA server the first time the router contacts the AAA server. Configuring Virtual Private Networks Configuring VPN DNC-166 Cisco IOS Dial Services Configuration Guide: Network Services Configuring...
Ngày tải lên: 24/01/2014, 10:20
Tài liệu Analysis of the Security of BGP/MPLS IP Virtual Private Networks (VPNs) ppt
... IP VPNs February 2006 [11] Fang, L., "Security Framework for Provider-Provisioned Virtual Private Networks (PPVPNs)", RFC 4111, July 2005. [12] Behringer, M., Guichard, J., and P. ... Systems Inc Category: Informational February 2006 Analysis of the Security of BGP/MPLS IP Virtual Private Networks (VPNs) Status of This Memo This memo provides information for the Internet community. ... BGP/MPLS IP virtual private network (VPN) architecture that is described in RFC 4364, for the benefit of service providers and VPN users. The analysis shows that BGP/MPLS IP VPN networks can...
Ngày tải lên: 14/02/2014, 16:20
Tài liệu Virtual Private Networks doc
... • mesh of hubs • star of hubs Virtual Private Networks (VPNs) • Used to connect two private networks together via the Internet • Used to connect remote users to a private network via the Internet • This ... work together • make sure that remote clients software works with your firewall VPN • Virtual Private Networks CS-480b Dick Steflik ... Router based VPNs • Typically used on big networks • specialized devices for to isolate internal LAN traffic and quickly convey inter-LAN...
Ngày tải lên: 17/02/2014, 14:20
Tài liệu Cách thiết lập VPN (Virtual Private Networks) Client potx
... vì nó không đòi hỏi certificate hay là PKI (Public Key Infrastructure) như L2TP. Virtual Private Networks (VPN) hay gọi theo tiếng Việt là Mạng Riêng Ảo, cho phép bạn mở rộng phạm vi mạng ... dial the initial connection theo hình dưới đây và Click Next Cách thiết lập VPN (Virtual Private Networks) Client ... Properties, double click vào Make New Connection, sau đó click Next 2. Chọn vào Connect to private network through the Internet theo hình dưới đây. 3. Nếu bạn chưa kết nối với internet...
Ngày tải lên: 26/02/2014, 14:20
Deploying Virtual Private Networks with Microsoft Windows Server 2003 pot
Ngày tải lên: 27/06/2014, 00:20
ssl and remote access vpns an introduction to designing and configuring ssl virtual private networks
Ngày tải lên: 06/07/2014, 15:29
Tài liệu Module 8: Configuring Virtual Private Network Access for Remote Clients and Networks doc
... and Remote Access Virtual Private Networking Using ISA Server 2004 Benefits of Using ISA Server for Virtual Private Networking Overview Virtual Private Networking Overview Configuring Virtual Private ... Server Lesson: Virtual Private Networking Overview What Is Virtual Private Networking? VPN Protocol Options VPN Authentication Protocol Options VPN Quarantine Control Virtual Private Networking ... authentication Less secure than L2TP over IPSec Module 8: Configuring Virtual Private Network Access for Remote Clients and Networks To implement quarantine control on ISA Server: To implement...
Ngày tải lên: 27/02/2014, 05:20
Virtual Private Network (VPN)
... SUMMARY VPNs do not make use of dedicated leased lines VPNs send data through a secure tunnel that leads from one endpoint to another VPNs keep critical business communications private and secure VPN components VPN servers VPN clients Protocols 39 TUNNELING PROTOCOLS Layer 2 Tunneling Protocol (L2TP) Provides better security through IPSec IPSec enables L2TP to perform Authentication Encapsulation Encryption 18 TUNNELING PROTOCOLS Secure Shell (SSH) Provides authentication and encryption Works with UNIXbased systems Versions for Windows are also available Uses publickey cryptography Socks V. 5 Provides proxy services for applications That do not usually support proxying Socks version 5 adds encrypted authentication and support for UDP 20 16 ENCRYPTION SCHEMES USED BY VPNS (CONTINUED) Secure Sockets Layer (SSL) (continued) Steps Server uses its private key to decode premaster code Generates a master secret key Client and server use it to generate session keys Server and client exchange messages saying handshake is completed SSL session begins 34 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 31 27 VPN CORE ACTIVITY 2: ENCRYPTION Encryption Process of rendering information unreadable by all but the intended recipient Components Key Digital certificate Certification Authority (CA) Key exchange methods Symmetric cryptography Asymmetric cryptography Internet Key Exchange FWZ 28 12 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 24 10 25 5 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 FIREWALL CONFIGURATION FOR VPNS 37 Protocol ... SUMMARY VPNs do not make use of dedicated leased lines VPNs send data through a secure tunnel that leads from one endpoint to another VPNs keep critical business communications private and secure VPN components VPN servers VPN clients Protocols 39 TUNNELING PROTOCOLS Layer 2 Tunneling Protocol (L2TP) Provides better security through IPSec IPSec enables L2TP to perform Authentication Encapsulation Encryption 18 TUNNELING PROTOCOLS Secure Shell (SSH) Provides authentication and encryption Works with UNIXbased systems Versions for Windows are also available Uses publickey cryptography Socks V. 5 Provides proxy services for applications That do not usually support proxying Socks version 5 adds encrypted authentication and support for UDP 20 16 ENCRYPTION SCHEMES USED BY VPNS (CONTINUED) Secure Sockets Layer (SSL) (continued) Steps Server uses its private key to decode premaster code Generates a master secret key Client and server use it to generate session keys Server and client exchange messages saying handshake is completed SSL session begins 34 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 31 27 VPN CORE ACTIVITY 2: ENCRYPTION Encryption Process of rendering information unreadable by all but the intended recipient Components Key Digital certificate Certification Authority (CA) Key exchange methods Symmetric cryptography Asymmetric cryptography Internet Key Exchange FWZ 28 12 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 24 10 25 5 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 FIREWALL CONFIGURATION FOR VPNS 37 Protocol ... SUMMARY VPNs do not make use of dedicated leased lines VPNs send data through a secure tunnel that leads from one endpoint to another VPNs keep critical business communications private and secure VPN components VPN servers VPN clients Protocols 39 TUNNELING PROTOCOLS Layer 2 Tunneling Protocol (L2TP) Provides better security through IPSec IPSec enables L2TP to perform Authentication Encapsulation Encryption 18 TUNNELING PROTOCOLS Secure Shell (SSH) Provides authentication and encryption Works with UNIXbased systems Versions for Windows are also available Uses publickey cryptography Socks V. 5 Provides proxy services for applications That do not usually support proxying Socks version 5 adds encrypted authentication and support for UDP 20 16 ENCRYPTION SCHEMES USED BY VPNS (CONTINUED) Secure Sockets Layer (SSL) (continued) Steps Server uses its private key to decode premaster code Generates a master secret key Client and server use it to generate session keys Server and client exchange messages saying handshake is completed SSL session begins 34 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 31 27 VPN CORE ACTIVITY 2: ENCRYPTION Encryption Process of rendering information unreadable by all but the intended recipient Components Key Digital certificate Certification Authority (CA) Key exchange methods Symmetric cryptography Asymmetric cryptography Internet Key Exchange FWZ 28 12 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 24 10 25 5 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 FIREWALL CONFIGURATION FOR VPNS 37 Protocol...
Ngày tải lên: 17/09/2012, 10:44
Virtual Private Network -mạng riêng ảo- VPN
... m¸y - In LuËn v¨n, TiÓu luËn : 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 ... để 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 ... mạng riêng intranet. 2.2.1.1 Đặc trưng của PPTP. • Công dụng của PSTNs (Public Switched Telephone Networks) : PPTP cho phép sử dụng PSTNs cho việc triển khai VPNs. Kết quả là, quá trình xử lý sự...
Ngày tải lên: 24/04/2013, 16:40
VIRTUAL PRIVATE NETWORK (VPN)
... 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 ... khi lại đóng vai _________________________________________________________________________ VIRTUAL PRIVATE NETWORK (VPN) Nhóm 18 Lớp: DHTH3 GV: Th.s Nguyễn Hòa Danh sách: 1. Đặng Hồng Hải 2. ... 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 nhu cầu...
Ngày tải lên: 25/04/2013, 21:03
RECOMMENDATIONS FOR BUILDING, MANAGING AND PROTECTING THE BRAND EQUITY IN VIASIA JOINT STOCK COMPANY
Ngày tải lên: 24/07/2013, 15:00