Hi Chris.

Thanks for reply.

Actually is the same NIC (fdx0) that connects to the same WAN Cable 
Modem. So I can't spoof the "previous or former" NIC because is the same 
one. I did tried to "spoof" the cable modem MAC (which I don't need to 
with other routers).without luck.

Thanks again.

Eric

<...>
>
> Sounds like you're using different hardware?  (different NIC's at a
> minimum it seems, since you're pulling a different IP from DHCP)  With
> a cable connection, it's likely that either your ISP isn't allowing
> the new system online (generally they only allow one PC per connection
> unless you pay for multiple public IP's), or some cable modems won't
> let out a new MAC address.
>
> Probably the easiest thing to do is spoof your old WAN MAC on m0n0wall
> by putting it into the WAN page.
>
> -Chris
>
>