Proxy ARP

Sorry if this has been asked before. I’m trying to do a Proxy ARP off the outside interface for NAT. Is this possible with Vyos? I have tried adding a 2nd interface to the eth0, did not work… Any advice would be awesome!

interfaces {
ethernet eth0 {
address x.x.x.59/27
duplex auto
firewall {
in {
name WAN-IN
}
local {
name WAN-LOCAL
}
}
hw-id 00:15:5d:65:6e:0d
ip {
enable-arp-announce
enable-proxy-arp
}
smp_affinity auto
speed auto
traffic-policy {
out WAN
}
}

nat {
destination {
rule 10 {
destination {
address x.x.x.60
}
inbound-interface eth0
log enable
protocol tcp
translation {
address 10.255.255.3
}
}
}