IP Address Problems

[dan]

On 10/01/06, Andrew Jorgensen <andrew.jorgensen at gmail.com> wrote:
> You say you have written your own script to spoof the MAC address?
> This is very likely the source of your troubles.  When does this
> script run?  (What other script triggers it?)  What exactly does your
> script do?

The script (below) was run by me, after I had logged in (only on the
spoofed machine)
sudo /etc/init.d/networking stop
sudo ifconfig eth0 hw ether AA:BB:CC:DD:EE:FF
sudo /etc/init.d/networking start

But the problems occur on the *real* NIC as well.

I am using the method suggested by Michael (above) to spoof the MAC
address now (in /etc/network/interfaces) and the problems still exist,
unless I activate the network after I have logged in via the GUI.

On 10/01/06, Michael J. Lynch <mlynch at gcom.com> wrote:
> dan wrote:
> > And auth eth0 has been added to the end of /etc/network/interfaces on
> > the laptop as well.
> >
>  Are you sure it's "auth" and not
> "auto".  Even so, nothing should be writing to the file at boot time.

Apologies, it is "auto".

> Try removing the appended line from your interfaces file, change the
> mode of the file to read only (sudo chmod a-w /etc/network/interfaces),
> then reboot and see what happens.  If this works, then the problem is
> definitely something prior to network initialization.  If the problem
> happens again, check mode and content of the interfaces file to see if
> either have changed.  If so, something is replacing the file.

I worked out what was adding "auto eth0", it's the GUI network-admin
tool after I deactivate/activate the network interface (which gives me
my "correct" IP) and clicked OK.

> I just had another thought.  Your DHCP client may be at fault too.  Take
> a look at /etc/dhcp3/dhclient.conf.  See if there is a section starting
> that looks like:
> <snip>
> If so, comment it out, especially if there is a keywork "fixed-address"
> in that section.

There is but it appears to be commented out. The only thing not
commented out is:

request subnet-mask, broadcast-address, time-offset, routers,
	domain-name, domain-name-servers, host-name,
	netbios-name-servers, netbios-scope;



Dan
--
http://www.danicity.co.uk