c# qr code generator source Before You Begin in Visual C#.NET

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Before You Begin
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This chapter presents the skills and concepts related to publishing internal Web sites and other internal services to the Internet. If you plan to complete the practices and lab in this chapter, you should prepare the following:
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A Microsoft Windows Server 2003 (Standard Edition or Enterprise Edition) computer installed as DC1 and configured as a domain controller in the cohovineyard.com domain.
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QR Code Creation In .NET
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Lesson 1
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Why This Matters
Encoding Universal Product Code Version A In C#.NET
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10-3
Linear Barcode Drawer In C#
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A second Windows Server 2003 computer installed as ISA1 and configured as a domain member in the cohovineyard.com domain. This server should have two network interfaces installed. To complete the network quarantine control practice, you also need to complete the following steps: a. Create a folder named C:\VPNQuarantine. b. Download the Configurerqsforisa.vbs script from http://www.microsoft.com/ downloads/details.aspx FamilyId=3396C852-717F-4B2E-AB4D1C44356CE37A&displaylang=en and add it to the C:\VPNQuarantine folder. c. Ensure that you have the Windows Server 2003 Resource Kit tools installed. The tools are available at http://www.micr osoft.com/downloads/ details.aspx FamilyID=9d467a69-57ff-4ae7-96ee-b18c4790cffd&display lang=en. d. Download and install the updated Remote Access Quarantine Agent from http://www.microsoft.com/downloads/details.aspx FamilyID=d4ec94b2-1c9d4e98-ba02-b18ab07fed4e&DisplayLang=en.
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A Microsoft Windows Server 2003 (Standard Edition or Enterprise Edition) computer installed as SERVER1. This computer should not be a member of the cohovineyard.com domain. This server should be located on the same network as the external interface of the ISA Server computer. This server should be running the DNS Service and the DNS client setting should be configured to use the server s Internet Protocol (IP) address as the DNS server.
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Encoding QR Code ISO/IEC18004 In None
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10-4
Creating UPC Symbol In Java
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10
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Configuring Virtual Private Networks for Remote Clients and Networks
Lesson 1: Planning a Virtual Private Networking Infrastructure
Before you deploy a virtual private network solution using ISA Server 2004, you must plan the deployment so that you can take full advantage of the ISA Server VPN features. This lesson discusses the protocols and authentication methods available when using ISA Server 2004 to implement virtual private networking. Moreover, the chapter describes how VPN quarantine control works. The chapter then describes how you can use ISA Server 2004 to implement a VPN solution and provides guidelines for planning the deployment.
After this lesson, you will be able to
Describe a VPN and when to use it List the VPN protocol options List the VPN authentication options Describe how VPN quarantine control works Describe how to use ISA Server 2004 to implement VPNs List guidelines for deploying a VPN solution using ISA Server 2004
Estimated lesson time: 30 minutes
What Is Virtual Private Networking
Virtual private networking allows secure remote access to resources on an organization s internal network for users outside the network. These resources would otherwise be available only if the user were directly connected to the corporate network. A VPN is a virtual network that enables communication between a remote access client and computers on the internal network or between two remote sites separated by a public network such as the Internet.
How VPNs Work
When you configure a VPN, you create a secured, point-to-point connection across a public network such as the Internet. A VPN client uses special tunneling protocols, which are based on Transmission Control Protocol/Internet Protocol (TCP/IP), to connect to a virtual connection port on a VPN server. The tunneling protocols use encryption protocols to provide data security as the data is sent across the public network. The two VPN protocols supported by ISA Server are Microsoft Point-to-Point Tunneling Protocol (PPTP) or the Layer Two Tunneling Protocol with Internet Protocol Security (L2TP/IPSec).
Lesson 1
Planning a Virtual Private Networking Infrastructure
10-5
PPTP and L2TP create virtual direct connections between a VPN client and VPN remote-access server, or between two VPN gateways. This connection allows a computer connected over the virtual network to send and receive TCP/IP messages in the same way as it does on other directly connected networks, such as computers located on the same Ethernet local area network (LAN). The actual network connection is transparent to the applications running on the client computer. PPTP and L2TP use encryption protocols to ensure that the connection is private or secure by encrypting all traffic sent across a public network. PPTP uses the Microsoft Point-to-Point Encryption (MPPE) protocol to protect data moving through the PPTP virtual networking connection. The L2TP/IPSec VPN protocol uses Internet Protocol Security (IPSec) to encrypt data moving through the L2TP virtual network.
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