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Using Ls with no switches returns a list of all address and name server data. The a switch returns alias and canonical names, d returns all data, and t filters by type. The following lines present an example Ls output when this command is used without switches:

When users forget their passwords, are transferred or terminated, you will have to manage their user objects appropriately. The most common administrative tasks related to user account security are unlocking an account, resetting a password, disabling, enabling, renaming, and deleting user objects.

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[nameserver1.contoso.com]

A 10.0.0.1

1. Design the ISA Server client deployment to meet your organization s requirements. What clients will you deploy, and how will you configure them

A 10.0.0.2

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You cannot use SecureNAT clients in this scenario because SecureNAT clients cannot be authenticated and the company policy states that only Authenticated Users are allowed to access the Internet. Employees that need only basic Web access can be configured as Web Proxy clients. You could automate the configuration of these clients by using a WPAD entry in DHCP to configure the browser settings. The purchasing department needs to run the Firewall Client software because it is using an application that is not using a protocol supported by the Web Proxy client. You can distribute the Firewall Client application to the users by using Group Policy. On both ISA Server computers, you must configure the properties of the Internal network to enable Automatic Discovery. The special port and protocol settings for the Winsock application can be configured on the ISA Server computers.

Zone transfers can be blocked at the DNS server so that only authorized addresses or networks can perform this function. The following error is returned if zone transfer security has been set:

Exam Objectives in this :

3-44

Exam Tip For the exam, you need to remember that the Ls command simulates a zone transfer, and that zone transfers are restricted by default in Windows Server 2003. To query a Windows Server 2003 DNS server with the Ls command, be sure to allow zone transfers to the computer on which you are running Nslookup.

Analyze forward proxy and reverse proxy requirements. Analyze firewall protocol requirements. Configure dial-up settings. Configure firewall chaining.

You can view the DNS Events log by using the Event Viewer node in the DNS console, as shown in Figure 6-3. You can also view this same log in the Event Viewer console, where it is named the DNS Server log.

Create policy elements, access rules, and connection limits. Policy elements include schedule, protocols, user groups, and network objects.

Figure 6-3

Well, you are finally ready to do something with Microsoft Internet and Security Acceleration (ISA) Server 2004. Users in your organization have been clamoring for Internet access and now you are ready to give it to them. Granting access to the Internet using ISA Server is relatively easy, especially if you want to give all users access to all resources on the Internet. All you have to do is to create an access rule that says all users on the Internal network have permission to use all protocols to connect to any resource on the Internet. However, you may want to be more restrictive in the level of access users have to the Internet. Or more likely, your organization has a security policy that says you need to be more restrictive. For example, you may need to prevent employees from using certain protocols or applications to access the Internet. You may need to restrict which Web sites users can access, or what time of day they can access the Internet. You may even need to apply one set of restrictions to one group of users and another set of restrictions to another group. Configuring all these restrictions is possible with ISA Server 2004. To do this, however, you must understand how ISA Server access rules work that is, what types of objects you must configure to enable these restrictions, and how you can put the objects together to ensure that users get the right level of access.

The DNS Events log records DNS server errors. If you are having problems with DNS, you can check Event Viewer for DNS-related events.

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