comp.os.linux.networking

On Mar 22, 4:45 am, Geoff Lane wrote:

> If one has two network cards connected to a computer (eg one ethernet
> and one wifi) and both are connected to the internet is there a priority
> for outgoing traffic or can this cause problems.

This will cause problems.

If the two cards are both connected to the same network and you are
not bridging, you have an illegal configuration -- you cannot route
between two interfaces on the same network. If the two cards are
connected to different networks, you may send a response packet to a
gateway that considers the source address to be possibly spoofed and
drops the packet.

Outbound connections will likely work, as the operating system can
choose the source address and will typically choose the address
assigned to the interface it transmits the packets on. Inbound
connections will be hit or miss.

DS