How to ensure that reverse NAT works correctly?

Network Load Balancing > Vector Maps
Creating a Vector Mapping rule is critical for ensuring that inbound connections go back out the same WAN interface they came in on.
 
When configuring a NAT rule the Edge appliance may automatically add a reverse NAT mapping (for One-to-One NAT) to ensure that bi-directional connectivity is established and that the same IP address is used for outbound connectivity.
 
Reverse NAT can only be assured when using One-to-One NAT mappings.  If the NAT rule is created on a backup link the resever path will not be created unless the SNAT option is selected.

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