What you are talking about is relativly easy, and would only require them
to change their gateway IP# (and possibly their netmask, depending on how
much work you want to do).
There is a feature built into linux call IP Masquerading (also know as
NAT, but we won't get into that now..). What you can essentially do is
take any address on the inside (through ethernet or modem) that can get to
your machine, and 'Masquerade' the Address as your own.. The machine will
keep a database of all the outgoing, and incoming connections, and route
them to the correct internal places..
Al this is done with the IPFW software that comes with just about any
Linux distribution (http://www.linux.org)
P.S. I am currently writing this on a Windows Laptop (ech!) with an IP
address of 10.0.0.2 on a PLIP (Parrallel Line IP - Laplink cable), that is
masqueraded with my Linux machine at home that is dialed into a dynamic
IP#... And I get Web, FTP, Irc, etc at 107Kbps...
GOD I LOVE LINUX!
:)
On Sat, 12 Jul 1997, Dave Whitlow wrote:
> On Thu, 10 Jul 1997, David A. Baldwin wrote:
>
> > I have a puzzle that I am trying to figure out. I have a conference room
> > in my company which I would like to allow guests to access the internet
> > from to show me demo's and such. I would like to allow them to plug in
> > their labtop into my ethernet hub in order to allow this access.
>
> Let me understand this right. Is this hub connected to your LAN ?
>
> What if their address already in use in your LAN ? Is this a wise approach?
>
> > Most of my customers have labtops with ethernet cards that they have
> > preconfigured for their own environment. I would like to allow them to
> > plug into my ethernet without any reconfiguration on their labtops
> > (running WinNT or Win95). After they are plugged in, I would expect that
> > they be able to access the internet.
>
> It doesn't take long to change the IP address. I often change mine
> numerous times when I visit a site and even with NT it only takes a minute
> or so and the odd reboot or so. With Linux a few seconds (an no reboot)
> covers it.
>
> Alternatively, give them modem or ISDN access to the Net through a dial-up
> ISP account.
>
> > Does anyone have any suggestions for something like this. My guess is that
> > this would take some sort of Dynamic Routing, and dynamic proxying to
> > accomplish this.
>
> Why invent complex and uncertain solutions. Make 'em change!
>
> Cheers,
>
> Dave
> -------------------------------------------------------------------------
> Dave Whitlow Tel: +44-(0)181-861-2001
> Idsec Ltd Fax: +44-(0)181-861-3433
> Suite A, 31-33 College Road, Mail: dwhitlow @
idsec .
co .
uk
> Harrow, HA1 1EJ, UK Web: http://www.idsec.co.uk
>
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