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Re: [K12OSN] ltsp, subnets, dhcpd.conf



So far everybody has given you correct advice, but which advice you use will depend on what setup you want.  Do you want to have thin clients all over the place on your subnet, or do you want to have a bunch of them in one room?  

It's probably going to be easiest in your case to use a 2-nic setup.  One nic is on "subnet 3", and the other serves your thin clients.  You could place the K12LTSP server between the Sonicwall machine and the rest of the network, thereby eliminating the problem of having 2 DHCP servers (the K12LTSP server would serve DHCP to subnet 3, and the Sonicwall machine would only serve DHCP to the K12LTSP server itself).

-Rob

On Tue, May 20, 2008 at 02:40:50PM -0400, Will Hatch wrote:
> Thanks for the quick reply Rob.  You've focused in on one of my problems.  The dhcp is served from the high school, as is dns.  There are no plans to have dhcp served from my building.  I do have two nics installed in the Edubuntu server, because that is the way I previously did it with k12ltsp.  I'm a Educational Technology teacher, so networking is a work in progress.  If I understand correctly, you can't have a dhcp server inside of a dhcp server.  So there is nothing I can do to my Edubuntu server to make things work?  
> 
> >>> Rob Owens <rob owens biochemfluidics com> 05/20/08 2:34 PM >>>
> If you want to have thin clients only on subnet 3, then it sounds like 
> you should use a single-nic setup.  This means, though, that the K12LTSP 
> server will be acting as the DHCP server for the entire subnet.  Make 
> sure that is ok, and make sure there is no other DHCP server on that 
> subnet.
> 
> If you set it up like this, then the K12LTSP server can be located 
> anywhere on your subnet and it will work.  Just make sure it's giving 
> out the correct IP addresses for your subnet.  Also make sure that you 
> define the proper gateway machine in dhcpd.conf.  It will not be the 
> K12LTSP server.  It will be the IP address of the Sonicwall firewall. 
> Now that I think of it, you'll also need to set the DNS server in 
> dhcpd.conf too.
> 
> -Rob
> 
> Will Hatch wrote:
> > Hi All,
> > 
> > I'll do my best to explain my issue.  I've successfully installed k12ltsp in the past.  That was when I was at a small school, with my cable modem sitting beside my desk.  I didn't have to worry about subnets, or changing the dhcpd.conf file.  Here is my current situation:
> > 
> > This is a three-building school district.  The internet is piped into the high school, where we have a Sonicwall firewall set up.  The high school used subnets 0,1, and 2.  My building uses 3.  The central office uses 4 and 5.  
> > 
> > I can't find any documentation that says what I have to do exactly, in a case like mine.  All the computers in my building use a subnet of .3.  I have Edubuntu with ltsp installed, I have a universal boot floppy written for clients.  But I know I have to do something to configuration files to get clients to boot.  
> > 
> > Thanks
> > Will
> > 
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