To get files into VBox OS/2 guest, you can use the VBox additions shared folders IFS
I'm currently developing. see
https://www.os2world.com/forum/index.php/topic,1905.0.htmlfor more details. It is not finished, yet, but it works just fine for copying files from/to VBox and
accessing your host disks.
Currently, VBox has only NAT networking option, so you can access the internet and local
network from within the OS/2 guest. Though, I'm not sure if windows shares will work. They
require your OS/2 guest to have the same network mask as your host LAN has. Though, with
NAT networking, guest IP addresses are assigned from 10.2.0.0/24 subnet, which could not
match your LAN's netmask.
Except for NAT networking, there is also TUN/TAP networking. There is a TAP driver for OS/2
writen by Willibald Meyer, who is also GenMac author. This driver was included with the old
VBox 1.6.x port. It seems to have issues with permission to include to newer VBox versions,
so we didn't included it. Also, TAPOs2 support on VBox side is currently broken in OS/2 port
of VBox. So, this feature is not working, currently.
The above applies to OS/2 port of VBox. If you have the OS/2 guest on other host, like
Windows/Linux, then host networking should work, You just need to disable NAT (which is
enabled by default), and enable "Internal network" feature.
If you just want to set up the ftp server on host, then it should work with NAT networking.
Also, copying files with scp/ssh should work too. (If you enter this command from the OS/2
guest. With NAT, you cannot access the guest from the host. For that, you need the "Internal
network" option. It is like "virtual switch" option in VirtualPC.).