Hi Rick,


 DF>> One thing that I couldn't clearly see though, you need an IP address
 DF>> for each _interface_ rather than an IP address for each machine.  So,
 DF>> if your Win95 machine uses an ethernet you have an IP address for that
 DF>> ethernet.  Then your Amiga should have an IP address for it's ethernet
 DF>> and _another_ IP for it's PPP dialup.  Any routing statements and the
 DF>> like must take this into account.

 >Ahh! Here's this point again. There seems to be 2 groups of thinking when it
 >comes to TCP. One group, to which you seem to belong, believes that your
 >interface needs a separate IP, the other group do not support this theory.

 >I belong to the "other" group :)

 >Logically speaking, your interface is not an address, so why does it need an
 >address allocated? You are basically saying I need 4 IP's for my 2 machines.
 >True this will work but it is not really needed. The computer is the address,
 >it is what processes the TCP packets and protocols.

Yes, but /how/ do you get the TCP packet to go through the correct
interface?  Your Ethernet card needs to have a different address to
your PPP connection.  Dave is correct here.


 >I look at it as if I only had a ppp link to my ISP then I would need 2
 >addresses, one for the Amiga and one for the PPP. But this is not the case, the
 >ppp is the same IP as my computer, it is given (in the state of dynamic
 >connections) by the ISP and is the address used to contact any TCP related
 >programs on my machine.

But you then need to pick an IP address for the Ethernet connection to
your Amiga. This is difficult without getting 2 permanently allocated
IP addresses from your ISP.

I am experiencing similar needs here to yours, we have a Linux server and
now need to dialup as a dynamic PPP as we have lost our 24hr permanent
IP. :(

We are sorting it out, and is easy to do in theory with Linux. (all I
have to do now is tell everything on the Amiga to talk to the local "proxy"
rather than talking to the outside world.  We are also thinking about
setting up a Firewall program on the Linux box - this will apparently be
a much better way of doing things. There should be some available for OS/2
or Win95. (maybe)


>Also, my ISP (and a few others I have seen) run extra machines for their own
>purposes off their server, this is usually done with ethernet cards. They only
>give the machine connected an IP, they don't allocate addresses to the actual
>ethernet connection other than to give it the machines IP.

I think you'll find that the other machines have only one interface, and
therefore need only the one IP address. The machine(s) with the dialup lines
will have a separate IP for each dialup line, as well as its Ethernet
address.



MikeTZ.
--- THOR 2.3 (Amiga;FIDO) *UNREGISTERED*