Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

For reasons I can't go into, I am working with a strange network configuration.

I have a one-way higher speed wireless link, and a slower bi-directional wireless link. There is a network interface for each link (currently only UDP works on the one way link).

My goal is to route all returning traffic (like TCP responses) from the one-way link over the bi-directional link.

Is this possible? The network interfaces on both ends of the wireless links are currently on Linux based PCs.

share|improve this question
I don't understand... are there two wireless links on one linux workstation, or two wireless links spread across two linux workstations? – Mike Pennington Jul 15 '13 at 16:13
Both ends have two wireless links on one linux box. – Derek Jul 15 '13 at 16:18
Are these 802.11 wireless links or something else? There are rules beyond just routing that you have to follow on many such links. Are the wireless links themselves routed? Or do they emulate a bridged network? – David Schwartz Jul 15 '13 at 16:23
The wireless links use HDLC. They are direct serial connections with a networking interface layer on top. – Derek Jul 15 '13 at 16:33
up vote 0 down vote accepted

You can do this with default gateways and static routes.

Here's a how to that should help since you didn't specify any particular OS:

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.