[2234] in linux-net channel archive
Networking: one IP setup -- Impossible ??
daemon@ATHENA.MIT.EDU (Thomas Pawlikaniec)
Mon Mar 25 03:41:19 1996
Date: Mon, 25 Mar 1996 03:34:02 -0500 (EST)
From: Thomas Pawlikaniec <neutrino@ee.mcgill.ca>
To: linux Net mailing list <linux-net@vger.rutgers.edu>,
linux PPP mailing list <linux-ppp@vger.rutgers.edu>
[to folx on linux-net list : It seems I am not getting any posts from it.
Maybe that's normal (?), if not: if answers to my problem appeared there,
sorry, someone be kind and send them to me please. Thanx!]
Here's something I would like to get working, if at all possible:
( my provider) ( My home )
ISP ---(PPP modem link)--- Machine #1 (one IP, dynamically assigned)
|
| (ethernet or ?)
|
Old Machine #2 (no real IP available here)
Machine #1 connects, and works well as a part of the Internet once the
connection is established. But I would like to be able to use
machine #2 also as another site connected on the net, without having to
log onto Machine #1 first, and from there jump on the Internet.
Also, I would like to be able to access Machine #2 from the Internet,
through Machine #1.
In other terms, I would like to be able to do something like SLIRP does
for shell accounts, transforming them into regular PPP/SLIP accounts as
far as software on the Machine #2 is concerned. I don't mind if this is
complicated, I want to practice and to have fun with networking basically :-)
I read the NET-2 howto and the NAG, but I am still uncertain of the steps
to take to get what I need. Please correct me or confirm on each of the
following ideas I have now about making such a setup.
I imagine this will be tricky if at all doable, (is it?) and will probably
involve the reserved class of addresses (like 10.x.x.x for example) behind
some sort of firewall/gateway running on Machine #1.
For example, Machine 1 could get the 10.0.0.1 IP on the home network (as
well as another regular IP attributed by the ISP at connection: Machine #1
would have 2 IPs then -- does it have to have 2 IPs actually ?), and
machine #2 would be 10.0.0.2 (or whatever within the reserved range).
-OR-
do I have to have 2 IPs fom the regular ones available ? (in which case
the whole exercice is impossible)
I am not certain I understood well the principle of a firewall/proxy
server, but I think I will have to throw that into the setup too. Am I
right ? In case you wonder, _yes_ I am a little (a lot! ;-) ) confused
here...
Right now, Machine #1 and Machine #2 have no connection at all: I can
set-up that one with:
- 'el cheapo' ;-) ethernet cards [I think the preferred solution]
- PLIP link [even cheaper, but not so fun ;-) ]
- serial line PPP (anyone done that ?)
- anything that might make it work !
[actually Machine #2 is basically not used, that's why they are not
connected... If I do this it's really to understand how things work!]
I believe there will be no fundamental design differences (other than speed)
between any of these, in which case I will probably go for NE2000 ethernet
cards. If the design of the system gets different depending on the choice
of the connection method, please tell me how and pros/cons.
If it appears I need to run a nameserver on Machine #1 or any other kind
of serious program like that, I will be glad to do so :-)
However, I would like to have the cleaniest design possible -- not
necessarily the simplest to set-up, but the most capable, with the least
limitations (I am sure there are some, if not only the fact that it will
be much more complex in any case than if I had 2 IPs available -- which I
probably could have if that was business matters, but again: I would like
to try this thing out, for the fun of understanding better how networking
works :-) as far as Linux allows me to! )
Any comments welcome, especially an ordered list of the steps I need to
take. Thank you in advance :-)
Thomas Pawlikaniec
.sig coming Real Soon Now!
