DSL using USB?

We have 8 machines networked together in a dental office. One of those machines we use as a server. We had DSL installed last week and they changed all of the settings to "Obtain IP address automatically" After re rebooted the remote machines we had a difficult time finding our mapped network drive. But I cant connect to the internet using the ethernet cable. I did some checking around and was told that the server should have a static IP address. I changed it back to a static address and everything works fine now as far as accessing the network drive, which all machines MUST do. What Id like to know is, can I have the DSL modem connected to more than one machine using the USB cable instead of the ethernet cable. I could see how one machine could use USB for access to the web, but I'm wondering if a USB hub will allow more than one machine to go online? If not a hub, then some other piece of equipment