Migrate the DNS from Unix to Windows

Ever needed to replace an older Unix DNS server with a new Windows 2008 server ? Here is a simple guide on how to migrate the DNS from Unix to Windows without too much effort.

DNS Migration Perquisites

It is a best practice to perform this migration as a transition and run both DNS servers in parallel until your new server is fully functional and you can safely remove the old server.

Before you start the actual DNS migration, you need to prepare both servers for the migration. First, on the Windows system make sure the server you are migrating to is fully patched and it has a fixed IP address. Then, depending on your network configuration you will need to tell your clients that a secondary DNS server exists and they should ask both servers when resolving DNS requests. If your clients are configured by DHCP (which is the best practice) then you will just have to add the Windows DNS server. In the DHCP server configurations please add the Windows server as secondary DNS server. Then you will need to configure the Unix BIND service to allow zone transfers to your newly installed Windows DNS Server.

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