Just connected a DOS 6.20 client to a Windows 7 workstation using SMB1 protocol, which itself needs to talk to Windows 10 workstations using no SMB1, ask me anything
but not really
@wrenpile Because it's a CAD/CAM milling machine bought circa 2005 for $large_sum whose builtin controller is a 486 with 1996 BIOS and Ethernet port and a DOS-based Microsoft LAN Manager TCPIP stack that shipped with it
and it needs access to the network to get the CAM files that actually produce tooled artifacts.
It has a floppy drive and an Ethernet jack but no USB port.