I have an XP Pro workstation that is running a program that needs to communicate with a computer that is a controller for an automated metal burning machine. The program creates a workgroup for these two computers, which works with no problem. I also want to connect this workstation to a router which has four other workstations and a server connected to it. The server is running Win2k server and we have a domain. The Win2k server is DHCP and DNS server. The reason to connect the workstation to the router is for Internet access. The workstation does not need access to any other network resources. When I connected the workstation to the router XP connected no problem and showed that it was connected to a workgroup with the same name as the domain. However, this stopped the computer from connecting to the controller computer on the metal burning machine. Any suggestions on how the workstation can communicate with both networks with only one NIC would be appreciated.