[99493] in RedHat Linux List
Re: LAN and ADSL
daemon@ATHENA.MIT.EDU (Ramon Gandia)
Sat Nov 14 23:14:35 1998
Date: Sat, 14 Nov 1998 19:10:35 -0900
From: Ramon Gandia <rfg@nook.net>
To: redhat-list@redhat.com
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
Nitesh Dhanjani wrote:
>
> Hello,
>
> I have a LAN running at home with two machines whose IP addresses are:
> 192.168.1.1 linux
> 192.168.1.2 win95
>
> I have IP masq setup and I dialin from my linux box.
>
> Next week, I will get ADSL, which will plug directly into my ethernet
> card. How do I still keep my LAN going and do something like IP Masq so
> my win95 machine can also use the ADSL service? Do I need another ethernet
> card? Or do I need to get a router?
You can do it either way.... the Linux machine can do routing,
or you can get a router.
Just about any old Cisco will route, but you need address
translation (NAT). This takes more memory in the Cisco, and
a later version of OS for the router. $$. In a serious
environment, you would do this. We do it here at Nook Net.
It routes between logical networks all on the same ethernet
port.
The cheaper solution is to use your Linux box to do the routing
and the NAT. The program you want is called IPMasquerade, or
ipfwadm.
What I would like to see you do is to use just one ethernet
card, say eth0 on the 192.... interface for your private
network, and eth0:0 on the ip your ISP gives you.
However, someone here on the list remarked that this is not
possible and that it needs TWO ethernet cards. Bummer. But
I think this may be an unfounded rumor.
--
Ramon Gandia ==== Sysadmin ==== Nook Net ==== http://www.nook.net
285 West First Avenue rfg@nook.net
P.O. Box 970 tel. 907-443-7575
Nome, Alaska 99762-0970 ======================= fax. 907-443-2487
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