James Pifer wrote:
I can't make 10.10.60.3 use 10.10.60.4 as the router.
I might be wrong about needing to use 10.10.60.3 for the return traffic. The DNAT function on 10.10.60.3 won't change the source IP address. As long a 10.10.60.4 has a route to the first network, this should still work.
If I loaded a port forwarding application on 10.10.60.3 and had it forward ports to .4 for port 5900 I would not have this requirement.
Can't iptables to the same thing somehow?
You lost me here. Iptables *is* our 'port forwarding application' on 10.10.60.3. The rule I wrote would accept traffic going to 10.10.60.3:5900 and send it back out to 10.10.60.4:5900.