Re: Setting up network

Glynn Clements (glynn@sensei.co.uk)
Tue, 8 Sep 1998 11:38:30 +0100 (BST)


Chris Hoover wrote:

> I'm in need of some advice in setting up my network at home. Here is
> what I have so far.
>
> HUB
> / \
> / \
> Waxman Tux
>
> Internet----

Hmm. I think that the cables need to be plugged in :)

> My internet connection (from my cable provider) is 24.4.120.6. Waxman
> and Tux are my two machines with ip's of 129.168.1.1, .2 respectivly.

Is that a typo? The private class C addresses are 192.168.*, not
129.168.*.

> Anyway, can I take the internet straight into my hub, or must I run in
> through it's own nic?

It depends. There isn't any inherent reason why it can't be connected
to the hub, although you can never be entirely sure with cable modems.

You will probably need to create an alias interface on one of the
boxes with the correct IP address (which might be static or obtained
via DHCP).

> If I can run it through the hub, what sort of security implications does this
> cause?

Your ISP can snoop your network. If both boxes reject source routed
packets, then you don't need to worry about the rest of the 'net if
you're using private IP addresses.

> I plan on using ip masq on the internal network.
>
> Finally, I've obtained the domain "choover.ml.org" for my ip. With this
> configuration, would it be possible for me to allow access to both
> machines from the net (i.e. my being able to telnet to both machines
> when I'm at work)?

Not directly (assuming that you only have a single IP address). Only
valid IP addresses can be reached from the 'net. You could set up port
forwarders on the host with the valid IP address to forward certain
connections to the other host.

-- 
Glynn Clements <glynn@sensei.co.uk>
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