You have more going on here than I can probably cover in email, but I'll take a shot.

Your macintosh is grabbing your internet connection. Cable modems are generally
configured to allow only a single connection to the internet, subsequent connections
will be blocked, unless you have contracted for something special from your provider.

You can't communicate between your Mac and your desktop because the addresses that
have been assigned to them are on different networks. Your Mac has an address from your
provider, which will be a routable address. Your linux box has the 192.x.x.x address that you
assigned. Even though they are physically on the same network, they have no way to know
that (or communicate with each other) because the addresses tell them they are on different
networks.

If you want to get both machines setup on the same network behind the cable modem, you
will need some type of network sharing device. You can use your Linux box to perform that function,
by adding a second ethernet interface and configuring IP Masquerading. If you don't feel that brave,
you can purchase a broadband router such as the SMC Barricade (my preference). There are plenty of
others out there as well, by Linksys, Dlink, Netgear, ad infinitum.

Hope that helps,
Bruce


Bruce Broecker
Network Comm Supervisor
The Toro Company


>>> np at f-matic.net 12/12/03 02:01PM >>>
a call for help to any networking people!

i need a little help setting up a local network to connect an OS X
powerbook and a linux desktop, using a small 4 port hub. what i'd
ideally like to do is to have internet access on my linux computer, but
be able to ssh into my OS X laptop to grab files i need. 

what i've attempted so far is plugging my cable modem into the uplink
slot of the hub, and plugging my powerbook and linux box into ports 2
and 3. the powerbook auto-detects the internet connection and runs fine
-- my linux box doesn't seem to be able to do this, although it can
auto-detect fine when plugged directly into the cable modem. so that's
problem number one: how can i get the linux box to detect the internet
connection when connected through the hub?

the second question is how to get the two computers networked ok. i
tried assigning the linux box an internal ip address 192.x.x.x using
ifconfig, which works fine. but when i attempt to ssh into the box from
my powerbook using that internal ip address, nothing happens. i have ssh
enabled on the linux box. when i try to nmap the internal ip address
from my powerbook, it shows no open ports, so obviously i'm doing
something wrong.

sorry if this is a little vague -- i'm a complete novice at networking.
if anyone needs more info, i will be happy to provide it. if it helps, i
am using a powerbook g3 with OS 10.3.1, and an athlon XP 2000 running
debian 2.4.21, with a Hawking 10Base-T 4 Port Hub.

thanks for any help!

best,
nick


_______________________________________________
TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
http://www.mn-linux.org tclug-list at mn-linux.org 
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_______________________________________________
TCLUG Mailing List - Minneapolis/St. Paul, Minnesota
http://www.mn-linux.org tclug-list at mn-linux.org
https://mailman.real-time.com/mailman/listinfo/tclug-list