Cyberoam is configured with 2 WAN links: WAN 1 and WAN 2. Only the SMTP traffic from LAN to WAN should always use WAN1 as primary and WAN2 as a backup gateway, in case WAN1 fails. Which of the following will help achieve this requirement?
Navigate to Network > Gateway and configure the active and backup gateways.
It is not possible to configure gateway failover using Firewall rules.
Create a LAN to WAN firewall rule for SMTP. Under the Advanced Settings, select 'Load Balance' in 'Route through Gateway', and select WAN2 as Backup Gateway.
Create a LAN to WAN firewall rule for SMTP. Under the Advanced Settings, select 'WAN 1' in 'Route through Gateway' and select WAN 2 as Backup Gateway.