some other host already uses address 192.168.0.2

keratos · 09-04-2008, 03:24 PM

Desktop linux box(192.168.0.2) running Fedora 9 with standard ethernet 10/100 LAN card (8139too driver). Wireless router configured for static IP addresses. Network-manager was not controlling the interface.

Networking was all fine then all of a sudden I'm getting strange error when booting up...

Code:

#/etc/init.d/network reload
Shutting down interface eth0:                              [  OK  ]
Shutting down loopback interface:                          [  OK  ]
Bringing up loopback interface:                            [  OK  ]
Bringing up interface eth0:  Error, some other host already uses address 192.168.0.2.
                                                           [FAILED]

searched for "some other host already uses address 192.168.0.2" but these did not help
http://www.linuxquestions.org/questi...d.php?t=644896
http://www.linuxquestions.org/questi...d.php?t=312115

So onwards ..

There are NO other connected devices (using my laptop for debugging, my router's web page indicates no other devices than the laptop itself - 192.168.0.3). The router is set for static IP addresses and my ifcfg looks like this

Code:

# cat /etc/sysconfig/networking/devices/ifcfg-eth0 
# Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+
DEVICE=eth0
BOOTPROTO=none
BROADCAST=192.168.0.255
HWADDR=00:1a:92:06:3f:42
IPADDR=192.168.0.2
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
GATEWAY=192.168.0.1
TYPE=Ethernet
DNS1=192.168.0.1
USERCTL=yes
PEERDNS=no
IPV6INIT=no
NM_CONTROLLED=no

Bizzarely if I arping the eth0 interface just after getting the above error, I get..

Code:

# if ! arping -D -I eth0 192.168.0.2 
ARPING 192.168.0.2 from 0.0.0.0 eth0
Unicast reply from 192.168.0.2 [00:01:6C:F5:7D:D1]  0.705ms
Sent 1 probes (1 broadcast(s))
Received 1 response(s)

What gives ??

I just could not get it working until I went into the system-config-network tool , deleted the interface , created a new on and this time let network-manager control the interface.

Then it worked....but what went wrong ??

watcher69b · 09-05-2008, 08:20 AM

do you have more than one interface on the system?

keratos · 09-06-2008, 04:05 AM

no. read my post.

thats obvious one to check.

raskin · 09-06-2008, 04:09 AM

Does the MAC

Code:

00:01:6C:F5:7D:D1

returned belong to any of your devices?

keratos · 09-07-2008, 02:56 AM

ah, yes good call...

Code:

# hal-find-by-capability --capability=net
/org/freedesktop/Hal/devices/net_00_1a_92_06_3f_42

# lshal -lu /org/freedesktop/Hal/devices/net_00_1a_92_06_3f_42
udi = '/org/freedesktop/Hal/devices/net_00_1a_92_06_3f_42'
  info.capabilities = {'net', 'net.80203'} (string list)
  info.category = 'net.80203'  (string)
  info.parent = '/org/freedesktop/Hal/devices/pci_10ec_8139'  (string)
  info.product = 'Networking Interface'  (string)
  info.udi = '/org/freedesktop/Hal/devices/net_00_1a_92_06_3f_42'  (string)
  linux.hotplug_type = 2  (0x2)  (int)
  linux.subsystem = 'net'  (string)
  linux.sysfs_path = '/sys/class/net/eth0'  (string)
  net.80203.mac_address = 114119032642  (0x1a92063f42)  (uint64)
  net.address = '00:1a:92:06:3f:42'  (string)
  net.arp_proto_hw_id = 1  (0x1)  (int)
  net.interface = 'eth0'  (string)
  net.linux.ifindex = 2  (0x2)  (int)
  net.originating_device = '/org/freedesktop/Hal/devices/pci_10ec_8139'  (string)
  net.physical_device = '/org/freedesktop/Hal/devices/pci_10ec_8139'  (string)

so although I have only one physical interface, the network layer MAC address is not the same as the MAC address reported by HAL.

???

how can this happen?

raskin · 09-08-2008, 02:31 PM

And do ifconfig or "ip link"

Code:

show 00:01:6C:F5:7D:D1

on any of your devices? Router shows only DHCP clients; open connections may still show 192.168.0.2. Also you can try to ping 192.168.0.2. It may be someone who connected, but just set a static IP without asking DHCP.

keratos · 09-20-2008, 06:11 PM

someone is(was) connected to my WAP. I am using shared key security. How can this be?

Mr. C. · 09-20-2008, 09:25 PM

What security mode were you using?

chort · 09-21-2008, 12:15 AM

The other MAC address belongs to a device manufactured by Foxconn.

raskin · 09-21-2008, 02:21 AM

Is your password hard to guess?

keratos · 10-21-2008, 04:40 PM

yes !?! why?

Total-MAdMaN · 10-21-2008, 04:46 PM

Quote:

Originally Posted by keratos

yes !?! why?

Because easy to guess passwords are one way someone can access something they're not supposed to. And just to make sure, you're aware raskin was asking about the wireless password, aren't you? What security do you have enabled on wireless router?

keratos · 10-22-2008, 03:51 PM

WPA-PSK

but thats not the issue. no one else is on the LAN, I've checked that.

ozminh · 11-20-2008, 11:46 AM

i think there's no connecting.

system-config-network

i left the "hosts" blank
and it's ok.