I own a motorolla SB4200 Cable modem and in the manual it says that you can share the internet using only the modem's Ethernet and USB connections. I have an Athlon XP running XP pro connected to it using the USB connections and a pentium 1 with win 98 using the ethernet. Whenever I try to use the internet on both the Pentium 1 will not work, and when the Athlon is turned off and I renew the IP address and default gateway the interntet will work on the Pentium1, however when the Athlon is turned back on and I renew the Ip address on it the Athlon can use the internet and The P1 can't. When the internet is working on the Athlon the P1 no longer has a gateway and I have tried manually inputting one. Thanks for the help. (Ps sorry for making it so long).

======================================================== It's hard to say without knowing your exact topology of the LAN you have set up, however, if you insert a switch/router then this may solve your problem. Your service provider may also prevent dual access to the same service coming from the same IP address (witch is all it sees when you access the internet via your modem/hub. That is to say the IP address of the modem/hub itself). Try putting a cheap $40.00 router between your modem/hub and the internet and have all computers plug/LAN into the rounter instead of the modem with the modem also plugging into the router. Again, what is the topology? It sounds like a star topology much like I have described here minus the router. borelli35

A little public relations and marketing hype has lead you to a false assumption because you missed the fine points in the FAQ's. That modem does not have a NAT in it for sharing a single IP address. It can bridge 1 system on the USB to the Ethernet plug and its network, and it can support up to 32 systems this way. But the fine print makes it clear that you have to have a separate IP address from your ISP for each system. The modem will not share a single IP between two systems. To do this, you need a router to plug into the modem. The router's DCHP can then share your single IP address between systems connected to it. To use both the Ethernet port and the USB port, you need at least two IP address from your ISP.

My cable modem has two output plugs one USB one Ethernet. The USB plug goes to the Athlon and the Ethernet to the Pentium 1. The Athlon and the Pentium 1 are not directly connected.

My modem has an ethernet port and USB port to, I have plugged the Ethernet into my Athlon system and the USB into my P4 Laptop, I run them at the same time with no problems