[K12OSN] Mixed network environment - using LTSP server for routing too

[Peter Scheie]

Hamlesh [Personal] wrote:
>> That means you didn't use the K12LTSP distro that installs a lot of nice
>> stuff for you.
> 
> Ah according to k12ltsp.org K12Linux was the more modern version, so I
> assumed that was the better version!
> 
> 
>> Below is the 'nat' init script.  Change the PUBLIC_ETHERNET interface at the
>> top if needed and fix any wrapped lines.
> 
> Tried that and executed it, still no joy :(
> 
K12LTSP has this enabled by default; K12Linux does not. To enable it:

     * echo 1 >/proc/sys/net/ipv4/ip_forward
     * edit /etc/sysctl.conf to make that permanent
     * iptables -t nat -A POSTROUTING -j MASQUERADE
     * iptables-save
     * service dnsmasq start

The first two turn on forwarding, which is the primary requirement. The next two 
tell iptables to allow port forwarding; if iptables is turned off, they are 
unnecessary. The last one is to provide a DNS service to the fat client. 
Remember that thin client's apps are running on the server so they use the DNS 
server listed in /etc/resolv.conf. On the TC segment, however, dhcpd.conf tells 
clients that the nameserver is the LTSP server, meaning there needs to be a 
nameserver running on the LTSP server. That's what dnsmasq does.

Peter