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Windows Server 2012 : Configuring IPsec (part 4) - Configuring connection security rules - Types of connection security rules, Creating an isolation rule

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Configuring connection security rules

After you configure the IPsec defaults for the computer, you can then create connection security rules. As explained at the start of this lesson, a connection security rule is a set of criteria that specifies how IPsec will be used to secure traffic between the local computer and other computers on the network. They can be used to specify whether a network connection between two computers must first be authenticated before data can be exchanged between them and to make sure any data exchanged between the computers is encrypted to protect against eavesdropping or modification.

Types of connection security rules

Connection security rules can be created using the New Connection Security Rule Wizard. As Figure 7 shows, Windows Firewall with Advanced Security supports five types of connection security rules:

  • Isolation This type of connection security rule can be used to isolate computers from other computers. For example, you can use isolation rules to protect computers that are joined to your domain from computers that are outside your domain.

  • Authentication Exemption This type of connection security rule can be used to specify computers that should be exempted from being required to authenticate, regardless of any other connection security rules that have been configured. For example, you can use authentication exemption rules to allow access to domain controllers and other infrastructure servers that the computer needs to communicate with before authentication can be performed.

  • Server-to-Server This type of connection security rule can be used to protect communications between two computers, two groups of computers, two subnets, or some combination of these, such as between a computer and a subnet. For example, you can use server-to-server rules to protect communications between a database server and a front-end web server.

  • Tunnel This type of connection security rule can be used to protect communications between two computers using IPsec tunnel mode instead of IPsec transport mode. For example, you can use tunnel rules to specify a gateway computer that routes traffic to a private network.

  • Custom This type of connection security rule can be used to configure custom rules using criteria from other rule types except tunnel rules.

Types of connection security rules.
Figure 7. Types of connection security rules.

To create new connection security rules using the New Connection Security Rule Wizard, right-click on the Connection Security Rules node in the Windows Firewall with Advanced Security snap-in, select New Rule, and follow the steps of the wizard. The sections that follow explain more regarding the steps involved in creating each of these different types of connection security rules.

Creating an isolation rule

The following steps can be used to create a new isolation rule using the Windows Firewall with Advanced Security snap-in:

  1. Launch the New Connection Security Rule Wizard, and choose Isolation on the Rule Type page.

  2. On the Requirements page, specify whether to request or require authentication for inbound connections, outbound connections, or both by selecting one of the following options:

    • Request Authentication For Inbound And Outbound Connections This option is typically used in low-security environments or where computers are unable to use the IPsec authentication methods available with Windows Firewall with Advanced Security. You can also use it for computers in the boundary zone in a server and in a domain isolation scenario.

    • Require Authentication For Inbound Connections And Request Authentication For Outbound Connections This option is typically used in environments where computers are able use the IPsec authentication methods available with Windows Firewall with Advanced Security. You can also use it for computers in the main isolation zone in a server and in a domain isolation scenario.

    • Require Authentication For Inbound And Outbound Connections This option is typically used in environments where network traffic must be controlled and secured. You can also use it for computers in the main isolation zone in a server and in a domain isolation scenario.

    image with no caption
  3. On the Authentication Method page, specify whether to use the default authentication methods or to specify a different method or list of methods:

    image with no caption
  4. On the Profile page, select which firewall profiles the new rule should apply to. By default, new connection security rules apply to all three profiles (domain, private, and public).

  5. On the Name page, specify a name and optional description for the new rule.

Note

Enabled by default

When you create a new connection security rule using the New Connection Security Rule Wizard, the new rule is automatically enabled by default.

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