Home > Articles

  • Print
  • + Share This
This chapter is from the book

Working with the Virtual Private Networks Node

A Virtual Private Network is an encrypted "tunnel" from an untrusted network such as the Internet into a trusted network, such as an organization’s Internal network. ISA Server 2004 possesses a wide array of VPN capabilities, all of which can be accessed through the Virtual Private Networks Node in the ISA Server Console, as shown in Figure 3.25.

Figure 3.25

FIGURE 3.25 Examining the Virtual Private Networks (VPNs) node in the ISA Console.

This section of the chapter covers the ISA Server Console settings in the VPN node at a high level, describing the general options available and giving an idea of what VPN tools are available in the console. For advanced VPN design, configuration, and step-by-step descriptions, see Chapters 9 and 10, "Extending ISA Server 2004 to Branch Offices with Site-to-Site VPNs."

Enabling and Configuring VPN Client Access

By default, VPN access through ISA Server is not enabled, and it must be turned on before VPN capabilities can be reviewed. Turning on VPN functionality is a straightforward process and can be performed as follows:

  1. Open the ISA Server Management Console (Start, All Programs, Microsoft ISA Server, ISA Server Management).
  2. In the console tree, select the Virtual Private Networks (VPN) node by clicking on it.
  3. In the Tasks pane, click the link labeled Enable VPN Client Access.
  4. Click the Apply button on the top of the Central Details pane.
  5. Click OK when the success dialog box, shown in Figure 3.26, is displayed.

    Figure 3.26

    FIGURE 3.26 Enabling VPN client access.

After VPN client access has been granted, the VPN client settings can be configured by clicking on the Configure VPN Client Access link in the Task Pane. This link invokes the VPN Clients Properties dialog box, shown in Figure 3.27, where the following settings can be configured:

Figure 3.27

FIGURE 3.27 Setting VPN client properties.

  • Maximum number of VPN Clients allowed  The default is 100, but it can be throttled based on the server’s capacity.
  • The specific Active Directory groups that can be granted remote access  This option is relevant only if the server is a member of an AD domain. For non-AD domain member ISA servers, Remote Dial-In Authentication Service (RADIUS) authentication can be used to specify which users have access.
  • What type of VPN Protocols will be allowed  The two options are the Point-to-Point Tunneling Protocol (PPTP) and the Layer 2 Tunneling Protocol (L2TP).
  • Whether or not user mapping will be enabled  User mapping allows for non–Windows authenticated users to be mapped to AD users so that user-based policies can be applied.

Configuring Remote Access Configuration

Many of the options associated with VPNs in ISA Server can be found in the Remote Access configuration dialog box, accessible via the Select Access Networks link in the Task pane. The dialog box invoked via this link, shown in Figure 3.28, allows for the configuration of Remote Access properties specific to VPN access, but not necessarily specific to clients. These include the following settings:

Figure 3.28

FIGURE 3.28 Configuring Remote Access settings.

  • Networks from which VPN clients can connect.
  • Address assignment properties, such as automatic VPN client IP address assignment via the Dynamic Host Configuration Protocol (DHCP).
  • Authentication methods allowed. This includes such protocols as Microsoft encrypted authentication version 2 (MS-CHAPv2), Extensible authentication protocol (EAP, for smartcards), and other downlevel encryption methods.
  • Remote Dial-In User Service (RADIUS) Settings.

Creating Remote Site Networks for Site-to-Site VPN

ISA Server 2004 also includes the capability to create encrypted tunnels between two disparate networks in an organization that are connected through the Internet. This allows for communication across the Internet to be scrambled so that it cannot be read by a third party. ISA provides this capability through its Remote Site VPN capabilities.

The Remote Site VPN options, available on the Remote Sites tab in the Central Details pane of the VPN node, allow for the creation and configuration of Remote Site networks for site-to-site VPNs. These site-to-site VPN networks enable an organization to connect remote networks together, creating one complete, routable, and logical network, such as the one shown in Figure 3.29.

Figure 3.29

FIGURE 3.29 Configuring Remote Access settings.

When configuring a site-to-site VPN between two ISA Server 2004 systems, the option exists to secure the traffic by using the IP Security Protocol (IPSec), the Later Two Tunneling Protocol (L2TP) over IPSec, or the Point-to-Point Tunneling Protocol (PPTP), depending on the individual organizational security needs. These options are available when running the New Site-to-Site Network Wizard that is launched from the Add Remote Site Network link in the Task pane.

In addition to supporting a destination ISA Server 2004 system for site-to-site VPN, ISA Server also supports connecting to a third-party VPN Gateway that supports the IPSec protocol. This greatly extends ISA’s reach because third-party firewall solutions that may already be in place are potential candidates for ISA site-to-site VPNs.

Specific configuration information for site-to-site VPNs can be found in Chapter 10.

Understanding VPN Quarantine

The concept of the VPN quarantine network is fairly straightforward; although, its implementation is not necessarily so. Essentially, VPN quarantine refers to the capability to have ISA place a client that does not conform to specific criteria into a special quarantined VPN clients network. This network can then be limited to only a specific set of low-risk activities. For example, it may be useful to validate that all clients have approved anti-virus software installed before full access to the network is granted.

VPN quarantine is not on by default, and must be specifically set up and configured. Chapter 9 contains step-by-step procedures, but the configuration of VPN quarantine consists of two processes. The first process involves configuring VPN client computers with a special listener that reports to the ISA server if the client passes specified criteria that are necessary for full access. The second component, illustrated in Figure 3.30, involves checking the box in the Quarantined VPN Clients Properties dialog box.

Figure 3.30

FIGURE 3.30 Enabling VPN quarantine.

Unlike the other VPN settings, you can invoke this dialog box in the Networks node by double-clicking on the quarantined VPN clients network listed under the Networks tab of the Central Details pane.

  • + Share This
  • 🔖 Save To Your Account

InformIT Promotional Mailings & Special Offers

I would like to receive exclusive offers and hear about products from InformIT and its family of brands. I can unsubscribe at any time.

Overview


Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

This privacy notice provides an overview of our commitment to privacy and describes how we collect, protect, use and share personal information collected through this site. Please note that other Pearson websites and online products and services have their own separate privacy policies.

Collection and Use of Information


To conduct business and deliver products and services, Pearson collects and uses personal information in several ways in connection with this site, including:

Questions and Inquiries

For inquiries and questions, we collect the inquiry or question, together with name, contact details (email address, phone number and mailing address) and any other additional information voluntarily submitted to us through a Contact Us form or an email. We use this information to address the inquiry and respond to the question.

Online Store

For orders and purchases placed through our online store on this site, we collect order details, name, institution name and address (if applicable), email address, phone number, shipping and billing addresses, credit/debit card information, shipping options and any instructions. We use this information to complete transactions, fulfill orders, communicate with individuals placing orders or visiting the online store, and for related purposes.

Surveys

Pearson may offer opportunities to provide feedback or participate in surveys, including surveys evaluating Pearson products, services or sites. Participation is voluntary. Pearson collects information requested in the survey questions and uses the information to evaluate, support, maintain and improve products, services or sites, develop new products and services, conduct educational research and for other purposes specified in the survey.

Contests and Drawings

Occasionally, we may sponsor a contest or drawing. Participation is optional. Pearson collects name, contact information and other information specified on the entry form for the contest or drawing to conduct the contest or drawing. Pearson may collect additional personal information from the winners of a contest or drawing in order to award the prize and for tax reporting purposes, as required by law.

Newsletters

If you have elected to receive email newsletters or promotional mailings and special offers but want to unsubscribe, simply email information@informit.com.

Service Announcements

On rare occasions it is necessary to send out a strictly service related announcement. For instance, if our service is temporarily suspended for maintenance we might send users an email. Generally, users may not opt-out of these communications, though they can deactivate their account information. However, these communications are not promotional in nature.

Customer Service

We communicate with users on a regular basis to provide requested services and in regard to issues relating to their account we reply via email or phone in accordance with the users' wishes when a user submits their information through our Contact Us form.

Other Collection and Use of Information


Application and System Logs

Pearson automatically collects log data to help ensure the delivery, availability and security of this site. Log data may include technical information about how a user or visitor connected to this site, such as browser type, type of computer/device, operating system, internet service provider and IP address. We use this information for support purposes and to monitor the health of the site, identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents and appropriately scale computing resources.

Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

Cookies and Related Technologies

This site uses cookies and similar technologies to personalize content, measure traffic patterns, control security, track use and access of information on this site, and provide interest-based messages and advertising. Users can manage and block the use of cookies through their browser. Disabling or blocking certain cookies may limit the functionality of this site.

Do Not Track

This site currently does not respond to Do Not Track signals.

Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


This site is not directed to children under the age of 13.

Marketing


Pearson may send or direct marketing communications to users, provided that

  • Pearson will not use personal information collected or processed as a K-12 school service provider for the purpose of directed or targeted advertising.
  • Such marketing is consistent with applicable law and Pearson's legal obligations.
  • Pearson will not knowingly direct or send marketing communications to an individual who has expressed a preference not to receive marketing.
  • Where required by applicable law, express or implied consent to marketing exists and has not been withdrawn.

Pearson may provide personal information to a third party service provider on a restricted basis to provide marketing solely on behalf of Pearson or an affiliate or customer for whom Pearson is a service provider. Marketing preferences may be changed at any time.

Correcting/Updating Personal Information


If a user's personally identifiable information changes (such as your postal address or email address), we provide a way to correct or update that user's personal data provided to us. This can be done on the Account page. If a user no longer desires our service and desires to delete his or her account, please contact us at customer-service@informit.com and we will process the deletion of a user's account.

Choice/Opt-out


Users can always make an informed choice as to whether they should proceed with certain services offered by InformIT. If you choose to remove yourself from our mailing list(s) simply visit the following page and uncheck any communication you no longer want to receive: www.informit.com/u.aspx.

Sale of Personal Information


Pearson does not rent or sell personal information in exchange for any payment of money.

While Pearson does not sell personal information, as defined in Nevada law, Nevada residents may email a request for no sale of their personal information to NevadaDesignatedRequest@pearson.com.

Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

  • As required by law.
  • With the consent of the individual (or their parent, if the individual is a minor)
  • In response to a subpoena, court order or legal process, to the extent permitted or required by law
  • To protect the security and safety of individuals, data, assets and systems, consistent with applicable law
  • In connection the sale, joint venture or other transfer of some or all of its company or assets, subject to the provisions of this Privacy Notice
  • To investigate or address actual or suspected fraud or other illegal activities
  • To exercise its legal rights, including enforcement of the Terms of Use for this site or another contract
  • To affiliated Pearson companies and other companies and organizations who perform work for Pearson and are obligated to protect the privacy of personal information consistent with this Privacy Notice
  • To a school, organization, company or government agency, where Pearson collects or processes the personal information in a school setting or on behalf of such organization, company or government agency.

Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020