I'm running trough ravenstar68's instructions, now I'm at the stage where I've set up the network bridge. So I've I've added a usb network adapter to my laptop, done the configure. As a test I've plugged my Mac into the usb network adapter.
The Mac is getting an IP address , I can use the internet Ect .I believe the "network bridge" is working , I've got Wireshark installed on my Mac. So I've tested "telnet smtp.blueyonder.co.uk 25" on the Mac , and yes the Mac is trying to reach "blueyonder" .
So onto the laptop
Running Wireshark on the laptop, the only visible connection is "network bridge". So I set up the "capture filter box for tcp port 25" , then rerun "telnet smtp.blueyonder.co.uk 25" on the Mac .
Wireshark on the laptop is not is not seeing "telnet smtp.blueyonder.co.uk 25" from the Mac.
So if I swap to the Wifi connection on my laptop and do a trace for port 25 , Wireshark shows packets .
I even tried creating a new a new bridge , using the laptops wifi and ethernet port . but I could get that to work .