Questions about multiple IP addresses on same interface

RouterOS General
1

So I have two public IP addresses on a class C and my default route goes out on that subnet as well.

So I have XXX.XXX.XXX.41 and XXX.XXX.XXX.42 and the default route has 0.0.0.0/0 with pref-src of XXX.XXX.XXX.41 and gateway of XXX.XXX.XXX.1 distance=1

Traffic routes out with no issues. What I’m trying to do is when traffic comes back in on XXX.XXX.XXX.42, it drops. If I change the pref-src to XXX.XXX.XXX.42, it starts flowing.

Am I goofing something up in NAT? When the pref-src is matching the interface I have the port forwards on and filter chain I use, it works great. But I need to be able to have XXX.XXX.XXX.41 with it’s own setup of port forwards and filters…

Thanks in advance!

2

use check gateway arp to make this work. in nat, don’t use out interface.

3

so I don’t masquerade the 3 outside interfaces?