Re: help: duplicate MAC address

2006-10-22 Thread Stanislav Maslovski
Hello, On Thu, Oct 19, 2006 at 01:00:27AM +0200, Javier Fern?ndez-Sanguino Pe?a wrote: > ... a Rogue user is sending you gratuitous ARP packets to poison your cache > for all IPs in the network ... Please excuse me for going out of the original topic, but there is one thing I would like to clarif

Re: help: duplicate MAC address

2006-10-19 Thread Lestat V
On 10/20/06, Javier Fernández-Sanguino Peña <[EMAIL PROTECTED]> wrote: On Thu, Oct 19, 2006 at 11:01:39AM +0800, Lestat V wrote: > On 10/19/06, Lestat V <[EMAIL PROTECTED]> wrote: > >On 10/19/06, Javier Fernández-Sanguino Peña <[EMAIL PROTECTED]> wrote: > >> On Wed, Oct 18, 2006 at 11:09:35AM +08

Re: help: duplicate MAC address

2006-10-19 Thread Lestat V
On 10/20/06, Javier Fernández-Sanguino Peña <[EMAIL PROTECTED]> wrote: On Thu, Oct 19, 2006 at 07:53:29AM +0800, Lestat V wrote: No, you arp requests are the "arp who-has YYY tell XXX" where XXX is the one [...] Sorry for the misunderstanding. Yes, but do you *see* ARP replies incoming to you

Re: help: duplicate MAC address

2006-10-19 Thread Javier Fernández-Sanguino Peña
On Thu, Oct 19, 2006 at 11:01:39AM +0800, Lestat V wrote: > On 10/19/06, Lestat V <[EMAIL PROTECTED]> wrote: > >On 10/19/06, Javier Fernández-Sanguino Peña <[EMAIL PROTECTED]> wrote: > >> On Wed, Oct 18, 2006 at 11:09:35AM +0800, Lestat V wrote: > > I tried "/usr/sbin/tcpdump -ei eth0 arp" for a w

Re: help: duplicate MAC address

2006-10-19 Thread Javier Fernández-Sanguino Peña
On Thu, Oct 19, 2006 at 07:53:29AM +0800, Lestat V wrote: > I tried using "arp -an -i eth0" plus "arping [MAC]", and results: > dance:/home/lestat# arp -an -i eth0 > ? (10.100.105.251) at 00:07:84:52:55:3C [ether] on eth0 > ? (10.100.105.252) at 00:07:84:52:55:3D [ether] on eth0 > ? (10.100.105.250

Re: help: duplicate MAC address

2006-10-18 Thread Lestat V
On 10/19/06, Lestat V <[EMAIL PROTECTED]> wrote: On 10/19/06, Javier Fernández-Sanguino Peña <[EMAIL PROTECTED]> wrote: > On Wed, Oct 18, 2006 at 11:09:35AM +0800, Lestat V wrote: I tried "/usr/sbin/tcpdump -ei eth0 arp" for a while and got results as excerpted as follows: (10.100.105.105 is me

Re: help: duplicate MAC address

2006-10-18 Thread Lestat V
Thanx. On 10/19/06, Javier Fernández-Sanguino Peña <[EMAIL PROTECTED]> wrote: On Wed, Oct 18, 2006 at 11:09:35AM +0800, Lestat V wrote: So, I guess you are saying that if you run 'arp -n' in 'You' and 'Other' systems in the same VLAN you see this: Right? How 'peculiar' is that MAC address you a

Re: help: duplicate MAC address

2006-10-18 Thread Javier Fernández-Sanguino Peña
On Wed, Oct 18, 2006 at 11:09:35AM +0800, Lestat V wrote: > I encouter an fake MAC address problem: > > I found that on ARP table of my computer, all IP addresses in my LAN > have a same and pecular MAC address. On ARP table of two other > computers in the same LAN as mine, different IP addresses

RE: help: duplicate MAC address

2006-10-18 Thread James Stevenson
Yes this could be perfectly normal. Are you behind a bridge ? > -Original Message- > From: Lestat V [mailto:[EMAIL PROTECTED] > Sent: 18 October 2006 04:10 > To: debian-security@lists.debian.org > Subject: help: duplicate MAC address > > I encouter an fake MAC address problem: > > I fou

Re: help: duplicate MAC address

2006-10-18 Thread Goswin von Brederlow
martin f krafft <[EMAIL PROTECTED]> writes: > also sprach Lestat V <[EMAIL PROTECTED]> [2006.10.18.0509 +0200]: >> Can it be normal? Or what may be going on my computer and the LAN? > > Yes, this can happen. I suggest you use the ifupdown pre-up hook to > change them on each machine. > > iface eth

Re: help: duplicate MAC address

2006-10-18 Thread martin f krafft
also sprach Lestat V <[EMAIL PROTECTED]> [2006.10.18.1115 +0200]: > Thanx. I am not quite sure about what you mean. However, the HAddress > as indicated by the "ifconfig -a" is "00:11:2F:57:9B:6F", which is not > the one as indicated in the ARP cache in other machine. in that case you may just hav

Re: help: duplicate MAC address

2006-10-18 Thread Lestat V
Thanx. I am not quite sure about what you mean. However, the HAddress as indicated by the "ifconfig -a" is "00:11:2F:57:9B:6F", which is not the one as indicated in the ARP cache in other machine. On 10/18/06, martin f krafft <[EMAIL PROTECTED]> wrote: also sprach Lestat V <[EMAIL PROTECTED]> [2

Re: help: duplicate MAC address

2006-10-18 Thread martin f krafft
also sprach Lestat V <[EMAIL PROTECTED]> [2006.10.18.0509 +0200]: > Can it be normal? Or what may be going on my computer and the LAN? Yes, this can happen. I suggest you use the ifupdown pre-up hook to change them on each machine. iface eth0 inet dhcp pre-up ip link set $IFACE address de:ad:be