The following is our experience with trying to network an application hosted on the OS2. Evidently we are doing something wrong. Can you help us. Ask anything you want.
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On the unclassified Windows XP computer, I simplified the setup. I ran the OS/2 VM as an internal-network only, no bridge nor NAT. I set the XP host IP address to 192.168.0.111, and set the OS/2 VM address to 192.168.0.222. I then ran Wireshark on XP computer to sniff everything on the internal network (i.e., all 192.168.0.x traffic). When I initiated a ping from OS/2 to XP, I can see the ARP broadcast "Who is 192.168.0.111? Tell 192.168.0.222.", as well as confirming the MAC within the ARP matched what I gave to OS/2. XP then replied with the correct ARP resolution.
Within OS/2, I watched the network statistics (netstat -i). I could see that the transmit count increased. However, the receive count never changed from zero.
There are [at least] four possible reasons for the observed behaviors:
1. XP has a firewall blocking outbound ARP.
2. VirtualBox does not route outbound Ethernet frames to the OS/2 VM virtual device.
3. The installed virtual device does not signal to OS/2 of a received Ethernet frame.
4. OS/2 has a firewall to ignore messages from the virtual device.
As for #1, I explicitly disabled all Windows firewall.
As for #2, I have not seen VirtualBox fail to route messages to other operating systems.
As for #4, I do not believe this version of OS/2 has a notion of firewalls.
That leaves me to believe the reason is #3. This version of OS/2 is old enough to not have native support for any of the possible VirtualBox network adapters. We tried a few different virtual adapters and OS/2 drivers, none of which worked. VirtualBox supports two families of network adapters - AMD PCNet and Intel e1000. I tried updating the PCNet driver with ones I found online, none of which worked. I tried installing an e1000 driver, but that did not work either. (A blog posted claimed that this particular version of OS/2 cannot use that particular e1000 driver.)
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