Multiple IPs into same interface

Hi,

public IPs are a.b.c.d and a.b.c.e, coming into ether1-gateway. Both IPs have been assigned to this interface.

There’s one internal client connected to ether2-master-local as 192.168.88.4. All traffic from a.b.c.d and a.b.c.e should forward to 192.168.88.4 and reply from the correct address. I’ve got it working for a.b.c.d but there’s no traffic response for a.b.c.e at all.

Help!?

Sorry, it’s on a hex series RB750GR2