openvpn building and integrating virtual private networks ebook

openvpn - building and integrating virtual private networks

Danh mục: Cơ sở dữ liệu

ssl and remote access vpns an introduction to designing and configuring ssl virtual private networks

Danh mục: Đại cương

Virtual Private Networks

Danh mục: Quản trị mạng

... The remote host decrypts the private key using its kept random number, and compares the private key to its private key (or list of keys, called a key−ring). If the private key does not match, ... throughout the day.163 Virtual Private Networks OverviewUsing the Internet to link LANs and give remote computers LAN access causes serious security,performance, reliability, and management problems. ... 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 use...

Virtual Private Networks

Danh mục: Quản trị mạng

... availability and load sharing solution for VPN connections between peer gateways and remote access clients.Chapter 27, “Userc.C and Product.ini Configuration Files”How to edit the Userc.c and Product.ini ... encryption keys, and exchange encrypted packets. IPSec is an encryption technology framework which supports several standards to provide authentication and encryption services of data on a private ... 630Configuring the Client 633Appendices Appendix A VPN Command Line Interface VPN Commands 638SecureClient Commands 640Desktop Policy Commands 642Appendix B Converting a Traditional Policy to...

Tài liệu Cách thiết lập VPN (Virtual Private Networks) Client - Phần II pdf

Danh mục: Quản trị mạng

... 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...

Xây dựng và thiết kế hệ thống virtual private networks

Danh mục: Công nghệ thông tin

Tài liệu Configuring Virtual Private Networks pdf

Danh mục: Quản trị mạng

... Configuration Guide: Network ServicesConfiguring Virtual Private Networks This chapter describes how to configure, verify, maintain, and troubleshoot a Virtual Private Network(VPN). It includes the following ... request-dialout commands have subgroup commands that are used tospecify such information as the tunneling protocol and dialer resource.Table 16 lists the new VPN subgroup commands and which command modes ... dialin and/ or request dialout.2. NAS VPN groups can be configured for accept dialout and/ orrequest dialin.Table 17 VPN Group Commands (continued)Command VPN SubgroupsConfiguring Virtual Private...

Tài liệu Analysis of the Security of BGP/MPLS IP Virtual Private Networks (VPNs) ppt

Danh mục: An ninh - Bảo mật

... continued strong support, and Eric Rosen, Loa Andersson, Alexander Renner, Jim Guichard, Monique Morrow, Eric Vyncke, and Steve Simlo, for their extended feedback and support.10. Normative ... E. and Y. Rekhter, "BGP/MPLS IP Virtual Private Networks (VPNs)", RFC 4364, February 2006.11. Informative References [2] Rekhter, Y., Moskowitz, R., Karrenberg, D., Groot, G., and ... Security of BGP/MPLS IP Virtual Private Networks (VPNs)Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution...

Tài liệu Virtual Private Networks doc

Danh mục: An ninh - Bảo mật

... •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 ... techniques, and assurance metrics;•Support a framework for international recognition and acceptance of IT security testing and evaluation results; and •Facilitate the development and growth ... and use of evaluated IT products and systems;•Champion the development and use of national and international standards for IT security;•Foster research and development in IT security requirements...

Tài liệu Cách thiết lập VPN (Virtual Private Networks) Client potx

Danh mục: Hệ điều hành

... 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...

VIRTUAL PRIVATE NETWORKS (VPN) docx

Danh mục: An ninh - Bảo mật

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o'reilly - virtual private networks 2nd edition

Danh mục: An ninh - Bảo mật

a technical guide to ipsec virtual private networks

Danh mục: An ninh - Bảo mật

Deploying Virtual Private Networks with Microsoft Windows Server 2003 pot

Danh mục: Quản trị mạng

mạng riêng ảo vpn (virtual private networks)

Danh mục: An ninh - Bảo mật

Tài liệu Module 8: Configuring Virtual Private Network Access for Remote Clients and Networks doc

Danh mục: Quản trị mạng

John Wiley And Sons Wireless Networks eBook LiB

Danh mục: Kỹ thuật lập trình

... cellular networks [20–22], which targets the market of 2010 and beyond. The uniﬁed platform envi-sioned for 4G wireless networks will provide transparent integration with the wired networks and enable ... transmitter and theWireless Networks3 6LMDS and MMDS are discussed in this chapter. MMDS networks utilize a single omni-directional central antenna that can provide MMDS service to an area faster and ... spectrumwas also used inside the European Union by Holland, Germany, Belgium and Austria. Italy and Ireland used a combination of auction and comparative bidding with the winners ofcomparative...

John Wiley And Sons Wireless Networks eBook LiB - Preface

Danh mục: Kỹ thuật lập trình

... Evolution (EDGE), cdma2000 and wideband CDMA (WCDMA)) arediscussed.Chapter 6 provides a vision of 4G and beyond mobile and wireless systems. Such systemstarget the market of 2010 and beyond, aiming ... layer and the MAC protocols oftwo wireless local area network standards, IEEE 802.11 and ETSI HIPERLAN 1. Further-more, it discusses the latest developments in the ﬁeld of wireless local area networks. Chapter ... of data networks in terms of size, performance and cost. PANs targetapplications that demand short-range communications. After a brief introduction, Chapter 11covers the Bluetooth and HomeRF...

Chapter 18 Virtual-Circuit Networks: Frame Relay and ATM pdf

Danh mục: Quản trị mạng

38
1,174
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Virtual Private Network (VPN)

Danh mục: Kỹ thuật lập trình

... 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Protocols39TUNNELING PROTOCOLSLayer 2 Tunneling Protocol (L2TP)Provides better security through IPSecIPSec enables L2TP to performAuthenticationEncapsulationEncryption18TUNNELING 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 UDP2016ENCRYPTION 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 begins34SUMMARY (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) 29BIếN 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 liệu153127VPN 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FWZ2812SUMMARY (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 risks412410255ENCRYPTION 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 DES30WHY 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 versatility13FIREWALL CONFIGURATION FOR VPNS37Protocol ... 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Protocols39TUNNELING PROTOCOLSLayer 2 Tunneling Protocol (L2TP)Provides better security through IPSecIPSec enables L2TP to performAuthenticationEncapsulationEncryption18TUNNELING 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 UDP2016ENCRYPTION 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 begins34SUMMARY (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) 29BIếN 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 liệu153127VPN 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FWZ2812SUMMARY (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 risks412410255ENCRYPTION 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 DES30WHY 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 versatility13FIREWALL CONFIGURATION FOR VPNS37Protocol ... 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Protocols39TUNNELING PROTOCOLSLayer 2 Tunneling Protocol (L2TP)Provides better security through IPSecIPSec enables L2TP to performAuthenticationEncapsulationEncryption18TUNNELING 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 UDP2016ENCRYPTION 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 begins34SUMMARY (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) 29BIếN 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 liệu153127VPN 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FWZ2812SUMMARY (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 risks412410255ENCRYPTION 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 DES30WHY 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 versatility13FIREWALL CONFIGURATION FOR VPNS37Protocol...

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