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 (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 2022
Standard
Datacenter (standalone only)
64-bit: English
Windows Server 2019
Standard
Datacenter (standalone only)
64-bit: English
Windows Server 2016
Standard
Datacenter (standalone only)
64-bit: English
Prior to WS_FTP Sever 2018 (8.6) Windows Server 2008 R2 (64-bit English) was supported. This server is no longer supported.
Your NLB cluster must consist of identical operating systems on each node. 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
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 2016, 2017, or 2019 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.
