Re: Linux DHCP problem - authentication?

henning.schnoor@xxxxxxxxx wrote:
Hi group,

I googled a while on this subject and did not find anything, sory if
this is an old question.

I have a problem connecting to a DHCP server using a linux notebook.
The situation is as follows:

- We have two notebooks, on notebook A, Linux and Windows are
installed, on notebook B, only Linux is installed.

- After arriving here, when connecting either one to the network and
booting Linux, the DHCP service does not work.

- When booting machine A with Windows, DHCP works, and from then on,
also works under Linux on this machine.

- I cannot get notebook B connected.

My theory is that on the first Windows boot, the Microsoft DHCP client
negotiates some authentication, and then the DHCP server saves the
notebook's MAC address, so after that, he recognises the machine and
allows it to log in. When I use the "dhclient" un machine B, I see
that it gets DHCP offers, but get a DHCPNAK signal, which I think must
be an authentification error.

Any errors in the system log?
DHCPNAK seems to be used to tell a client to use a address.

Have you tested to see that the network work on the Linux boxes if you use ip-numbers? Some microsoft dhcp has trouble of sending a proper DNS address which leads to that you don't be able to use ip-names untill you manually assign a working DNS in your /etc/resolv.conf


Does anyone have an idea how to make Linux do the same login procedure
which Windows apparantly does?

microsoft does a lot of things, if you are located in EU, you are entitle to get the dhcp source code from microsoft, so you can adapt none microsoft systems to properly communicate with the server (this don't apply to 3rd party dhcp programs).


--

//Aho
.

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