Requirements

To implement a two-node failover configuration for WS_FTP Server, you need the following:

• A single license with multiple activations for WS_FTP Server V2017 (they must be the same edition; for instance, you cannot mix an FTP only edition with an SSH edition that includes the Ad Hoc Transfer module)
• Windows Server OS for each WS_FTP Server installation, also called a node. Supported operating systems for NLB failover clustering are:

Operating System	Edition	Supported Versions
Windows Server 2012 R2	Standard Datacenter	64-bit: English
Windows Server 2012	Standard Datacenter	64-bit: English
Windows Server 2008 R2	Standard Enterprise	64-bit: English Your NLB cluster must consist of identical operating systems on each node. For example: two Windows Server 2008 R2 Standard installations, or two Windows Server 2012 Datacenter installations. Both nodes should have similar hardware, .NET frameworks and service packs.

• Each node requires two network adapters with dedicated IP addresses
• Microsoft Network Load Balancing (included with Windows Server 2008 R2 and 2012) for each node

The shared resources should be installed on systems that are separate from the two WS_FTP Server installations:

• User database for authentication (shared by both nodes) can be: WS_FTP Server database, Active Directory, or other LDAP or ODBC database
• Microsoft SQL Server 2008 R2, 2012, or 2014 Standard or Enterprise, for WS_FTP Server configuration data (shared by both nodes)
• A NAS or file share for the file transfer file system and log data shared by both nodes

  You must configure all shared resources completely before installing WS_FTP Server or the failover solution may not function properly.