Thank you for your help.

Im wondering why the TC needs to renew its Network Configuration.
Is there no way it could use the Information recieved while PXE Boot?

Now I am facing the problem, that the second DHCP DISCOVER send by the  
TC does not reach our DHCP Server (different form LTSP Server). Our  
Network Team could trace it, so we are sure, that it has been sent,  
but we do not know why it does not reach the DHCP Server. Is there a  
simple way for reusing the information from the first DHCP Offer?

Kind regards,
chris

Zitat von Richard Doyle <[email protected]>:

> On Thu, 2010-10-14 at 19:02 +0200, Krzysztof Paliga wrote:
>> Hi,
>>
>> Im wondering why with the following firewall rule the thin client
>> refuses to boot:
>>
>> iptables -A OUTPUT -d 192.168.0.0/16 -j ACCEPT
>> iptables -A OUTPUT -j DROP
>> iptables -A INPUT -s 192.168.0.0/16 -j ACCEPT
>> iptables -A INPUT -j DROP
>>
>> (linked under /etc/rcS.d/S99iptables)
>>
>> Both the ltsp server & the thin client have IP in this subnets.
> The thin client doesn't have an IP when it starts to boot, and your
> rules prevents it from obtaining one.
>
> Try adding
>
> iptables -A INPUT -j LOG
>
> before
>
> iptables -A INPUT -j DROP
>
> and
>
> iptables -A OUTPUT -j LOG
>
> before
>
> iptables -A OUTPUT -j DROP
>
> and you'll see that bootp/dhcp requests are blocked.
>
>
>>
>> When I start the firewall after the thin client has bootet, everything
>> works fine(inclusive server login).
>>
>> Kind regards,
>> chris
>>
>
>
>
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-- 
________________________________________

Krzysztof Paliga

Technische Universitaet Berlin
tubIT - Server und Systeme
Einsteinufer 17
10587 Berlin

Tel  : +49-30-314-21240
Mail : [email protected]
Web  : http://www.tubit.tu-berlin.de
________________________________________


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