Migrating Radius from Windows Server 2003 to 2012 R2

To follow up on my previous blog post regarding migration DHCP from Windows 2003 to Windows 2012 due to the End-of-life of Windows 2003 on July 14th 2015, I will continue down this track and provide you with a simple guide to migrate the Radius server from a source server, running on Windows 2003 to target server on Windows 2012 R2.

Export Internet Authentication Service (Radius) from Windows 2003

  • Copy %windir%\syswow64\iasmigreader.exe from a server running Windows 2012
  • Copy iasmigreader.exe to the source server into C:\WINDOWS\system32
  • On the source server in command prompt, type iasmigreader.exe and then press ENTER. The migration tool will automatically export settings to a text file.
  • IAS settings are stored in the file ias.txt located in the %windir%\system32\ias directory on the source server.
  • Copy the ias.txt file to the target server (beware the file contains passwords)

On Target server Install NPS

  • In Server Manager, add new Role Services, select Network Policy Server, Install with default values

Import Settings to Target server Running NAS

  • Open command prompt, and type Netsh nps import filename=”<path>\ias.txt”

Register the NPS server in the default domain using the netsh command

  • At the command prompt, type netsh ras add registeredserver and then press ENTER. Remember the account must, as minimum, be member of “Domain Admins”

Verify that Radius is active and supporting clients.

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