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Configuring the DNS servers in the remote office to forward requests to the main office DNS

Because the DNS servers in each office are authoritative for their own zones, we need to configure the DNS servers in the remote office to forward requests referring to the DNS servers in the main office. So that the clients in the remote office to access resources outside their zones.

To configure DNS forwarders, please follow these steps:

1. Log on to the DNS server as a domain administrator.

2. Click Start, point to Administrative Tools, and then click DNS.

3. Right-click server_name, click Properties, and then click the Forwarders tab.

4. On the Forwarders tab, type the main office DNS IP addresses.

5. Click OK.

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Procedures of Installing Domain Controller in Remote Office over VPN/WAN

1. Configuring the Network Settings – assign the main office DNS as Preferred DNS.
2. Verifying Name Resolution on the New Server – ping each other by FQDN.
3. Adding a Delegation for the Zone – add the remote office server you plan to install DC on it.
4. Installing Active Directory – use dcpromo.
5. Re-Configuring the office's DNS - use itself as its preferred DNS server and main office DNS as its alternate DNS server.
6. Configuring the DNS servers to forward requests – add the IP addresses of the DNS servers from the main office.