Using 2 WANs in uplink balancing but force using only one

Question

I have two WANs in uplink balancing and normally one of them is in active interfaces (e.g. WAN1) and the other is in standby (e.g. WAN2). 
 Sometimes I want to let one of our internal endpoints to connect to the internet via WAN2 so: 
 1. I move the WAN2 from standby to active 
 2. define a "Multipath Rule" with: Source: Endpoint IP Service: Any Destination: Internet IPv4 Persistence: By Interface Bind interface: WAN2 
 3. Sort the WANs with WAN1 on top, WAN2 as the second and set the "Weight" on the Active Interfaces to: WAN1=100 and WAN2=0 
 Should that be sufficient to avoid other endpoints using the WAN2 as the outbound interface? 
 I had issues when the "weight" was set to "100 / 10" - I noticed some connections tried to "leak" through WAN2 and I don't want them to use this WAN interface at all.

apijnappels · Answer

It should be good. Other option is to make a second multipath rule (also second in line) with source: any, service any, destination Internet IPv4, persistance By Interface and interface WAN1. That way the first endpoint hits the first rule and all others hit the second rule. 
 Also if WAN1 should fail, All traffic will most likely fail over to WAN2.

Using 2 WANs in uplink balancing but force using only one

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