Hello!
I’ve been experiencing problems configuring my network correctly, because of its weird setup (hello ISP).
Its like this:
wlan0 192.168.x.y
ether0 159.148.x.y
gw: 192.168.x.254
So what i need is to forward ether through wlan without changing the source address.
On linux it is enough just to enable ip_forwarding and everything works. On RB it doesnt.
Any ideas?
I don’t see how that setup is weird at all?
RouterOS has routing enabled by default, so you don’t have to do anything at all to make this work. Just don’t NAT. You do need a default route so the router knows where to send on traffic to. Is that set?
That’s what i wanted to know 
And yea, there is a default route, so it must be a problem on ISP’s side (we’re fighting with them atm too).
Thanks!
For the routing to work correctly, both sides have to add routes:
You have to add routes (which would be the default gateway) that use their gateway,
and they have to add routes that use your gateway.
If they haven’t added static routes for your network, then you could enable NAT (masquerading).