Ok, so the scenario is this:
I have a G5 Quad (running Leopard) with no wireless card. The G5 is connected by ethernet to a Mac-Mini (running Lion), which is picking up my AirPort Extreme network over WiFi. The Mac-Mini shares it's internet connection over ethernet to the G5 enabling it to connect to the internet perfectly. I can also screen share or ssh into the G5 from the Mac-Mini without any problems.
Now comes the trouble:
I have a MacBook Pro (running Lion) which also connects to the same WiFi network as the Mac-Mini. I can see (and connect to) the Mac-Mini from the MBP without trouble, but I cannot see or connect to the G5 from the MBP. How can I configure this so that I can ssh or screen share the G5 from my MBP?
IPs and subnets of machines:
Mac-Mini IP: 10.0.0.9 Subnet Mask: 255.255.255.0
MBP IP: 10.0.0.4 Subnet Mask: 255.255.255.0
G5 IP: 192.168.2.3 Subnet Mask: 255.255.255.0