[K12OSN] Blocked net access

[John Lucas]

On Friday 12 January 2007 04:32, Nakashima wrote:
> Hi all,
> New install of K12LTSP 6 taking all defaults.
> Both Windows and Mac OS boxes connected to Eth0 switch can't get to the
> net.
> Clients connected to Eth0 switch have no problem getting to the net.
> Any ideas?
> Thanks  :-)
> --Peter
>

Yes. Unless changes are made, your LTSP server is not set up as a router and 
won't pass packets from the "inside" network to the "outside" network. The 
terminals run processes on the server, which has access to both networks, but 
non-terminals attached to the "inside" do not have access to the outside. 

To keep the PCs on the inside and allow them out, you need to make several 
changes:

	- turn on packet forwarding on the server (make it a router)
	- give the server's inside address as a router in the DHCP stanza for the PCs
	- make sure you don't have an IPTables rule preventing forwarding
	- make sure your perimeter router knows the route back to the inside network
	- make sure your perimeter firewall allows the inside network to forward

This is all basic TCP/IP networking 101 and is not specific to LTSP.

-- 
        "History doesn't repeat itself; at best it rhymes."
                        - Mark Twain

| John Lucas                          MrJohnLucas at gmail.com               |
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