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Re: [K12OSN] Networking configuration

regular cable

Jeremy Schubert wrote:
Do I need a cross over cable between eth1 and my cable modem or just a regular cable?

----- Original Message -----
From: John Lucas <mrjohnlucas gmail com>
Date: Monday, June 16, 2008 5:44 pm
Subject: Re: [K12OSN] Networking configuration
To: "Support list for open source software in schools." <k12osn redhat com>

 > Jeremy Schubert wrote:
 > > I used to have three clients connected to by dlink device that
 > acts as a
 > > switch, dhcp server and proxy server (shares the internet, but
 > I guess
 > > not exactly a proxy server, anyway...)  Client computers
 > gateway is set
 > > to the ip of the dlink device.   The dlink device is
 > connected to the
 > > cable modem.
 > >
> > > >
 > > Now I have introduced my CentOS ltsp server.  Currently I
 > have eth0 and
 > > eth1 plugged into the dlink device.
 > >
> > > >
 > > So, do I have to plug eth0 into my cable modem and eth1 into
> my switch? > > And then the gateway for my client computers would be the ltsp
 > server
 > > instead of the dlink device?
 > >
 > You shouldn't have both NICs on the same network segment
 > (subnet), it
 > will not work.
 > As I recall the client side of LTSP is on eth0 by default, so
 > eth1 would
 > go on the cable modem and eth0 goes on the LAN side (not WAN
 > side) of
 > the Dlink. Your clients also go on the LAN side of the DLink.
 > This
 > assumes you want to use the LTSP server as your router/firewall
 > instead
 > of the DLink. If this is the case, then be sure to *turn off*
 > DHCP on
 > the DLink and let the LTSP server handle that task too. The WAN
 > side of
 > the DLink will not be used. The client's default route would
 > point to
 > the LTSP server (be sure to turn on packet forwarding if you
 > have PCs
 > that need to pass traffic through the server).
 > The other way to do this is to run a single NIC LTSP server
 > (only eth0)
 > and plug the LTSP server and all clients onto the DLink LAN
 > side, turn
 > off DHCP on the DLink but continue to use the DLink as your
 > router/firewall with the WAN side connected to the cable modem.
 > In this
 > scenario, the DLink would be the default route for all clients
 > (including the LTSP server).
 > > Also, during the ltsp install, the eth0 was designated
 > x.x.x.254 and
 > > eth1 dhcp.  Currently I connect to the server using putty
 > (ssh).  Is
 > > there a cmd line I can use to change the eth1 to static and
 > modify both
 > > cards address?
 > >
 > You can usually change the network configuration with a GUI too.
 > I use
 > KDE and installed the KDE admin tools, which adds an
 > "Administration"
 > item to the main menu. The exact setup depends on your ISP. The
 > single
 > NIC setup wouldn't require changing eth1, because there would be
 > no eth1.
 > --
 >          "History
 > doesn't repeat itself; at best it rhymes."
 >                          - Mark Twain
 > | John
 > Lucas                MrJohnLucas gmail com               |
> | St. Thomas, VI 00802 > http://mrjohnlucas.googlepages.com/ |
 > | 18.3°N,
 > 65°W              AST (UTC-4)                         |
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