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Re: [K12OSN] dhcp: k12ltsp 3.1.2



Reverse your eth0 and eth1 connections, and you should be fine.  As Eric pointed out, DHCP is emitted from eth0, which is assumed to be where your thin clients live.  DO NOT connect eth0 to the main school LAN, but rather connect eth1 to it--and just do a default install.

It's like this:


|
|----eth0----K12LTSPBox----eth1---MAINNETWORK
|

Your thin clients live on the segment hanging off of eth0.  The main school network is connected to via eth1.

--TP


On Fri, 2003-10-31 at 20:13, Dennis Daniels wrote:
Thanks to all who've provided tips and answers to my questions.

I've disconnected my k12lstp server from the school network entirely. I 
don't have the political or technical strength to fight too hard so soon.

Could we discuss 'bulletproof' options? I need to see k12lstp succeed in 
  my class and I think, from some of the other posts, I'm not alone in 
facing some critical, and justified opposition, from Win Lan network 
administrators.

I still need access to the school's network so that my students can 
access the web and my online support materials. How can I set up the 
k12ltsp server so that it's no longer interfering with the LAN DHCP? I 
know I can turn off the dhcp... that would entail a lot of manual 
configuration, something I'd like to avoid as I am still teaching five 
classes of English lit. :)

Best Regards and Many Thanks!
Denny



Eric Harrison wrote:
> On Fri, 2003-10-31 at 13:09, Steve Wright wrote:
> 
>>On Fri, 2003-10-31 at 13:51, Dennis Daniels wrote:
>>
>>
>>>[....] My server is using a switch that is shared by a 30+ 
>>>node computer lab. In that lab 7 win2k stations lost their IP addresses 
>>>when they renewed their dhcp lease. The Win2k boxes can't log-on, which 
>>>requires the Computer Info Serv. guy to come in and manually fix it. You 
>>>can imagine the time and problems that requires to get fixed... and 
>>>naturally, they blame my DHCP server, the k12ltsp system I'm running as 
>>>the culprit.
>>
>>
>>I'm sorry, but it is at fault.   I'm sorry I did not see your earlier
>>postings - I would have told you how I had already made that mistake..
> 
> 
> Yes indeed.
> 
> 
> 
>>> If yes, how do I fix it because they will shut 
>>>down my network and the 20 or so new planned client nodes that are 
>>>waiting the back room.
>>
>>
>>the easiest way ?  unplug yourself.  plug your clients directly into
>>your Terminal Server, then connect your Terminal Server to their network
>>via its' eth1.
> 
> 
> 
> I went way out of my way to make sure that K12LTSP is as least-likely
> as possible to cause problems. The default design is to connect the
> terminals to eth0 and connect eth1 to the local area network. Eth1
> is firewalls itself off, it should look just any other client
> workstation from the lan.
> 
> If you deviate from the defaults, you have the potential to cause
> yourself problems. It is absolutely possible to deviate from the
> defaults without causing yourself a problem, but you have to be
> very careful and have the LAN guys verify that your design is
> correct and does not wreck havoc.
> 
> 
> 
>>>I need to prove to my Asst Principal, who supports my ltsp project, and 
>>>to CIS that my dchp server is not the problem or be able to prove to 
>>>them that I can prevent this problem in the future.
>>
>>
>>Sorry to advise so readily, but you must lose this focus quickly, and
>>make very sure they never, never, have an issue with your network again,
>>or things may escalate further.  Even Asst Principals have been known to
>>suddenly "lose support" in the face of unprecedented criticism.
>>
>>"squeaky clean" is the ticket..
>>
>>
>>take care out there..
>>/steve
> 
> 
> I know of several schools that banned Samba because someone setup
> a rogue server, made it a domain master, and then cranked the os
> level up high. The rogue samba server took over the whole network,
> causing untold grief for the windows admins.
> 
> This had a strong influence on me when we sat down to design 
> K12LTSP....
> 
> The "squeaky clean" certainly helps ;-)
> 
> -Eric


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--TP
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