The real routing gurus are on the Sustworks mailing lists, but while
we're here, let's tear this up a bit and see if we can't clarify the
issues more. Upon re-reading your original, I'm thinking either your
terminology is foo or you're trying to use the built in connection
sharing incorrectly.
At 11:07 PM -0400 05/24/2005, James Sedgwick wrote:
I have a rather pressing [1] need to share an internet connection
amongst a bunch of computers.
The WAN connection is dial up via the modem and the LAN connection
is ethernet and the OS on the gateway computer is Panther (10.3.9).
Here is the NAT configuration required by Connection Sharing:
WAN -> modem -> (iface [A]) Gateway Mac (iface [B]) -> LAN
iface [A] on your Gateway, which is plugged into the modem, is given
a *public* / publically routable address by your ISP's DHCP servers.
iface [B] on your Gateway, which is plugged into your LAN, is
assigned a *private* address by connection sharing, in the 192.168/16
block.
The computers on your LAN will be assigned *private* addresses by the
DHCP service (as configured by the connection sharing) on your
gateway Mac, also in the 192.168/16 block.
Unfortunately, the machines on the LAN all have public routable
addresses so I need to configure the ethernet connection on the
gateway computer with a public routable address and when I do that,
it stops sharing the connection with the LAN computers.
The machines on the LAN have *publically* routable addresses? They
shouldn't. The point of Apple's connection sharing is that it is a
NAT routing set-up. The machines on your LAN will be hidden behind
the address translation module in that gateway.
It's starting to sound like you want the gateway Mac to act like a
normal router, and not do any NAT functions? That's ok, but it means
that you cannot use Apple's connection sharing as is. You'd need a
product such as IPNetRouterX to configure things.
Why do the machines on the LAN need publically routable addresses?
- Dan.
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