iptables -t nat -A PREROUTING -p tcp -d 1.2.3.4 -j DNAT --to-destination 127.0.0.1:12345

iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 1.2.3.4 -j SNAT --to-source 127.0.0.1
iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 127.0.0.1 -j SNAT --to-source 127.0.0.1

root@vm8583:~# ip link add bogus type dummy
root@vm8583:~# sysctl net.ipv4.conf.eth0.arp_ignore=3
root@vm8583:~# ip addr add 10.0.0.1/32 bogus scope host
root@vm8583:~# ip link set bogus up
root@vm8583:~# ip link show bogus
4: bogus: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT
    link/ether 5e:8b:38:f3:46:ce brd ff:ff:ff:ff:ff:ff

arp_ignore - INTEGER
    Define different modes for sending replies in response to
    received ARP requests that resolve local target IP addresses:
. . .
    3 - do not reply for local addresses configured with scope host,
    only resolutions for global and link addresses are replied
    4-7 - reserved