[K12OSN] Networking configuration

[Huck]

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 at 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 at 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 at gmail.com               |
>  > | St. Thomas, VI 00802     
>  > http://mrjohnlucas.googlepages.com/ |
>  > | 18.3°N,
>  > 65°W              AST (UTC-4)                         |
>  >
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> 
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