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VanLUG Email Archive

Re: ADSL and Linux router?

Ted Powell
Wed, 7 Oct 1998 09:48:37 -0700

On Tue, Oct 06, 1998 at 07:04:19PM -0700, Jeffrey Yee wrote:
> [...]
> Will I need two network cards for my Linux router box?

Yes. One connects to the outside world, and one to your local network.

> What are the advantages/disadvantages/differences of having seperate IPs as
> opposed to IP masquerade? I guess I won't be able to telnet into a machine
> behind the router if I use IP Masq right? [...]

You connect into the gateway machine and use your account there to connect
into machines on your internal network. But you shouldn't be using telnet
and sending everything in the clear. Configure your gateway machine not
to allow telnet from the outside world--not from you, not from J. Random
Cracker. Some time between now and when you're going to need to contact
your machines from off-site, learn about SSH, Secure SHell. Set it up
on your machines and on the ones that you're going to be wanting to call
home from.

Besides providing reasonably secure authentication and communications, ssh
makes using X on remote hosts really easy. I routinely run X applications
on machines that are behind remote firewalls (ones that I'm authorized
to use, natch), with no fuss.

-- 




  http://psg.com/~ted/  (Ted Powell)
If your hard drive crashes, perhaps you have a recent backup. If Earth
crashes, what then? We need off-site backup: Luna, L5, Mars, wherever.