IP Address Problems

dan hentaidan at gmail.com
Mon Jan 9 22:11:59 UTC 2006

And @ mike

On 09/01/06, Michael J. Lynch <mlynch at gcom.com> wrote:
> dan wrote:
> What does your /etc/network/interfaces file look like.  Post it if
> there isn't anything you consider a security risk.

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
	script grep
	map eth0


The one on my spoofed laptop is the same except it has the following appended:

iface eth0 inet dhcp

auto eth0

> I your system is trully configured to use DHCP assigned IP addresses,
> then your ISP's DHCP server is what assigns the addresses.  If it is
> not obeying it's own lease durations and assigning you a new IP address
> each time you log on, the problem is on their end.  That being said,
> the DHCP server *will* give you a differenct IP address if your MAC
> address is different.  Since you said something about spoofing MAC
> addresses, this may be the source of the problem.  Especially if you
> are using a different MAC address each time.

Well, I started spoofing at least two months before the call, but I
used the MAC address of my registered PC (am only allowed one NIC) to
my laptop, and I never had (or was told) of any trouble until know.
And since the registered NIC has problems as well...?


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