OS/2, eCS & ArcaOS - Technical > Networking

Network setup for VirtualBox

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Neil Waldhauer:
I've been using ArcaOS running under VirtualBox running on a Windows 11 host. Setting up the network is pretty confusing.

A laptop has a WiFi card and wired ethernet. I can connect either one to my network. I set up Adapter 1 as an Intel Pro/1000 MT desktop (NAT) so that it can get TCP/IP from either laptop interface.

But I want NetBIOS, too. I don't think I can get that from NAT. NAT is TCP/IP-only as far as I know. So I defined Adapter 2 as PCnet-FAST III (Bridged to the Ethernet interface on the laptop.) That only gives me NetBIOS over Ethernet, but that will be adequate. So far, so good.

But now I move to Linux host, and NetBIOS does not work. In fact, I'm not at all sure any Adapter 2 function works on Linux. Perhaps I should ask over in the VirtualBox forum, but there are more OS/2 experts here.

How are you implementing NetBIOS under VirtualBox?

Lars:
Can you not use "Netbios via TCP/IP" instead of plain "Netbios" ?

Roderick Klein:

--- Quote from: Neil Waldhauer on December 18, 2025, 01:06:02 am ---I've been using ArcaOS running under VirtualBox running on a Windows 11 host. Setting up the network is pretty confusing.

A laptop has a WiFi card and wired ethernet. I can connect either one to my network. I set up Adapter 1 as an Intel Pro/1000 MT desktop (NAT) so that it can get TCP/IP from either laptop interface.

But I want NetBIOS, too. I don't think I can get that from NAT. NAT is TCP/IP-only as far as I know. So I defined Adapter 2 as PCnet-FAST III (Bridged to the Ethernet interface on the laptop.) That only gives me NetBIOS over Ethernet, but that will be adequate. So far, so good.

But now I move to Linux host, and NetBIOS does not work. In fact, I'm not at all sure any Adapter 2 function works on Linux. Perhaps I should ask over in the VirtualBox forum, but there are more OS/2 experts here.

How are you implementing NetBIOS under VirtualBox?

--- End quote ---

You do not implement NETBIOS under Virtualbox best I can tell. But also do not use NAT as Netbios cannot be routed via NAT.  Also use the E1000 NIC not the PCnet=fast driver, that OS/2 driver is pretty bad. Or can you not define two E1000 NIC's ?

Roderick

Ian B Manners:
Under network setup for your container, select "Allow All" for Promiscuous Mode.

Neil Waldhauer:
Further experimentation. First, I say again that on Windows 11, NetBIOS works on adapter 2 as expected.

Setting Promiscuous mode has no effect, as far as I can tell.

Even TCP/IP on Adapter 2 does not work in Linux. I can swap adapter type, it makes no difference. And If I put NetBIOS on Adapter 1, it does work in Linux. But I have to have the adapter in bridged mode, so I have to choose the adapter. That means not supporting WiFi.

This sounds like a bug in VirtualBox. Adapter 2 works in Windows, but not in Linux.

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