[K12OSN] Internet access restricted to some computers

[Roger]

On 8/28/06, Krsnendu Dasa <krsnendu108 at gmail.com> wrote:
> We access the internet through IPCOP. All computers connect to the same
> gigaswitch which connects to IPCOP.
> K12LTSP server and a windows xp sp1 desktop (office) can connect fine but 2
> WinXP SP2 laptops cannot connect. I tried connecting using both wireless and
> wired connection.
>
> K12 and office can access modem web interface on the other side of IPCOP.
> The laptops can connect to IPCop, K12 and to office (rdp connection) but
> cannot directly connect to the modem on the other side of IPCOP.
> When we try to ping the modem if works for K12 and office but fails for the
> laptops. In IPCOP logs I can see records of office connecting to the
> internet but no record of laptops connecting.
>
> It was working fine last week. I tried rebooting IPCOP, resetting the switch
> etc. Now I am not sure what to do. It seems IPCop is blocking the laptops
> but I don't know what to do to fix it. I can connect to internet fine from
> home with the laptop.
>
> Can anyone point me to the right place to look for a solution. What do you
> think is happening?

I'd double check to be sure the laptops are getting the correct
default route set.  Are you able to ping the ipcop device from the
laptops?   Are the laptops getting the correct IP address?