Module 13: Implementing ISA Server 2004 Enterprise Edition: Site-to-Site VPN Scenario

Overview Implementing a Site-to-Site VPN Scenario Lab: Implementing a Site-to-Site VPN Scenario

Lesson: Implementing a Site-to-Site VPN Scenario Issues in Deploying Site-to-Site VPNs Guidelines for Implementing Distributed Configuration Storage Servers Guidelines for Implementing Network Load Balancing for VPN Guidelines for Configuring ISA Server Clients Guidelines for Configuring Access Rules for Site-to-Site VPNs

Issues in Deploying Site-to-Site VPNs Common site-to-site VPN deployment issues include: Choosing a tunneling protocol Configuring the remote site VPN gateway server Configuring network rules and firewall access rules Choosing a tunneling protocol Configuring the remote site VPN gateway server Configuring network rules and firewall access rules ISA Server Enterprise Edition site-to-site deployment issues include: Creating a preliminary connection to install the remote Configuration Storage server Configuring Configuration Storage server replication between locations Implementing NLB for the site-to-site VPN Configuring firewall and Web proxy caching Creating a preliminary connection to install the remote Configuration Storage server Configuring Configuration Storage server replication between locations Implementing NLB for the site-to-site VPN Configuring firewall and Web proxy caching

Guidelines for Implementing Distributed Configuration Storage Servers To deploy the branch-office Configuration Storage server: Use a third-party VPN solution Use Routing and Remote Access Service Use a server publishing rule Use a temporary ISA Server enterprise Use an ISA Server backup file Use a third-party VPN solution Use Routing and Remote Access Service Use a server publishing rule Use a temporary ISA Server enterprise Use an ISA Server backup file To manage Configuration Storage server replication between office locations, use the ADAMSites tool to create ADAM sites and configure replication between sites

Guidelines for Implementing Network Load Balancing for VPN When you enable NLB for site-to-site VPNs: The connection owner for the VPN connection is automatically assigned with failover in the event of a server failure You must assign static IP addresses for VPN clients on each member of a multiple-server array You must configure the virtual IP address for the remote array as the VPN tunnel endpoint, and add all the dedicated IP addresses for the array members to the remote site network properties The connection owner for the VPN connection is automatically assigned with failover in the event of a server failure You must assign static IP addresses for VPN clients on each member of a multiple-server array You must configure the virtual IP address for the remote array as the VPN tunnel endpoint, and add all the dedicated IP addresses for the array members to the remote site network properties

Guidelines for Configuring ISA Server Clients When using ISA Server Enterprise Edition, Web Proxy and Firewall clients must connect to the array DNS name The DNS name is assigned when the array is configured, but can be modified The client must be able to resolve the array DNS name using DNS Configure a DNS host record using the array DNS name and each array members dedicated IP address if NLB is not enabled and the shared IP address if NLB is enabled The DNS name is assigned when the array is configured, but can be modified The client must be able to resolve the array DNS name using DNS Configure a DNS host record using the array DNS name and each array members dedicated IP address if NLB is not enabled and the shared IP address if NLB is enabled When configuring Web Proxy or Firewall client chaining, configure the downstream array to use the DNS name for the upstream array

Guidelines for Configuring Access Rules for Site-to-Site VPNs When configuring access rules for site-to-site VPNs, allow only required network traffic: Create computer sets to define specific computers that need access rather than using the entire network Configure access rules to allow only required protocols Use Web and server publishing rules Restrict access based on user sets Create computer sets to define specific computers that need access rather than using the entire network Configure access rules to allow only required protocols Use Web and server publishing rules Restrict access based on user sets When deploying main site domain members or members of a trusted domain in the remote site, you must enable the required protocols between the domain controllers, or between the domain members and domain controllers

Lab 13: Implementing a Site-to-Site VPN Scenario Exercise 1: Enabling NLB and CARP for the Main\Front-End Array Host1 Host2 Den-DC-01 Den-ISAEE-02 Den-ISAEE-01 Den-CSS-01 RO-ISAEE-01 Den-Web-01 Den-Clt-01 Exercise 2: Configuring the Main Office Array for a Site-to-Site VPN Exercise 3: Deploying a ISA Server Remote Site Exercise 4: Configure the Branch Office Array for a Site-to-Site VPN

Course Evaluation