Router with 2 public interfaces

["Flávio Costa" <fcosta75@gmail.com>]

Hi.

I have a router with 3 interfaces. One is connected to an internal
LAN. The other 2 are connected to internet.

I have the following interfaces:

eth0 -> (internal ex. 192.168.0.1)
eth1 -> (fixed ex. 200.213.105.108)
eth2 -> (dynamic ex. 201.10.10.11)

The default route is configured for interface eth2.

Inside LAN I have a webserver listening on 192.168.0.10:80

People reaching my webserver by interface eth2 is all working fine.

When someone connect to webserver by interface eth1 I doesn't work,
because packets go back by default route (eth2), which is not the same
they arrive (eth1).

I tried marking packets and forcing transverse by original interface,
but it does not worked.

Can someone give me an example of "iptable" and "ip" commands to
configure this? I do not want balanced traffic, because in future I
may block incoming requests to eth2 and keep it default route to
people in LAN connect to webservers by that interface, which is less
expensive.

Thanks in advance

Flavio Costa