Lost part of my LAN

Here's a strange problem, at least it is to me. I have
cable internet, which runs into computer #1 via ethernet.
I have a second NIC card in computer #1 which goes to my
hub, and from the hub to computer's #2, #3, and #4.
They've been working great for many months now. All are
running XP Home Edition with all of the MS updates.

I rebooted computer #1 the other day, and now, all 4
computers can talk to each other (I can explore all
harddrives from any of the computers, and use any of the
printers from each computer), but only computer #1 has
internet access. I've pulled the NIC's out, and
reinstalled their drivers, but still don't have internet
on any of them except for #1. I've went in and enabled
ICS, still nothing. I even tried bridging the NIC's, but
ICS already has done that.

My broadband NIC is set to obtain the IP address
automatically, which works great. The LAN NIC is manually
set to 192.168.0.1, and the other computers are all set to
192.168.0.xx. Subnet masks are all 255.255.255.0. On the
LAN side, there is no DNS server address set, and no
default gateway's set.

What am I missing here? Thanks for any suggestions! If
possible, could you email the suggestions directly to me
at . I really appreciate it!

-Wes-