At 10:10 PM 5/27/2003 -0400, you wrote:
All,
In regard to MACs, I was thinking about Dan's comments about proxy
ARP.  Could I implement a router between the modem and GB and use something
like proxy ARP "to muck with the IP space" as Dan referred to it?

If the ISP's DSL router is running in bridged mode, and uses ARP to request the client
MAC address (which some ISPs don't do, instead hardwiring the customer MAC address),
then putting a router in between the DSL modem and the gnatbox would work, if the router
supports proxy arp (and you can divide the 9 host subnet into, say, two /30 networks?).
i don't know about other manufacturers, but cisco routers do proxy arp by default, so if you
were running a cisco and the ISP's router arped for a host on the "inside" net, the cisco would
lie and reply that it was the address (and even if the ISP hardwires the MAC address, give them
your router's MAC address for all 9 IP addresses - when the packets get to your router's DSL
interface, it'll sort out what goes where. If you have any more specific questions, let me know,
and I'd be glad to suggest something...


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