There are two methods for perfoming inbound load balancing.
The first is through our VirtualNAT application proxy, which allows for easy inbound balancing of TCP traffic for web, email, and other standard application to a server on the LAN.
The second is through one-to-one or one-to-many NAT mappings. This process, which is required for passive FTP, or any non-TCP based application, requires a separate LAN address for each WAN port tied to a server.
WebServer 10.10.10.1 -> WAN1 188.8.131.52
WebServer (secondary address) 10.10.10.2 -> WAN2 184.108.40.206
WebServer (secondary address) 10.10.10.3 -> WAN3 220.127.116.11
Each server address must have a corresponding Vector Map and a firewall rule allowing the inbound traffic (if the firewall is enabled).