Linux router

[Rabeeh Khoury <rabeeh@xxxxxxxxxxxxx>]

Hi All,

I would like to ask about Linux as a router if it has the following functionality -

Is it possible that the kernel routes packets according to the destination
port AND the interface where the packet is received from ?

If so, please point me to a documentation regarding it (if available) ; and what it is called in the kernel source tree.

If not, is there any alternatives ways such adding packages to the kernel sources in order to get this functionality ?

Regards,
Rabeeh