While i am configuring network setting on backtrack4. i was running my backtrack on vmware workstation and NAT is bridged to physical mem like it was said on the tutorial that watched. i typed ifconfig eth0 up, and hit enter, as well as dhclient eth0 up, but resulted in different output. it says "no such device" is written and i would like to configre this problem.
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I'm running Ubuntu 10.04.2 LTS and from time to time eth0 connection is lost.
Looking at syslog (below), if its a hardware (network card) problem or a software bug?
syslog file:
i install kernel rpm after i boot that kernel network not working kernel name : kernel-rt-trace-2.6.24.7-132.el5.centos.i686 [URL] error "Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring."
View 1 Replies View RelatedAny hints why I'm getting the following message: dhclient: Internet Systems Consortium DHCP Client 4.1.1-P1 dhclient: Copyright 2004-2010 Internet Systems Consortium. dhclient: All rights reserved.
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Running 10.04. For some reason, starting today, I have no internet connection unless I run this command in terminal - sudo dhclient eth0. I have a hard wired ethernet connection on a Desktop PC with a static IP address (there are a number of devices in the house) and it has been running 100% for months and months. Why suddenly do I have to enter this command to get connection? When I switch on I get a connection in that when I click on the Top Panel icon and right click Connection Information it tells me I have an active connection to my router on the normal IP address. I cannot ping the router and Firefox says Server not found. After sudo dhclient eth0 everything works - what has happened since yesterday evening and this morning to stop what has been 100% for months?
View 6 Replies View RelatedI have to do a project on network security.For that i have to capture the packets from the device. I installed libpcap tool in ubuntu. If I give ifconfig -a it lists out eth0, wlan0, lo. I am able to connect to the internet via eth0. But when I give
#include <stdio.h>
#include <pcap.h>
int main()
{
char *dev, errbuf[PCAP_ERRBUF_SIZE];
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It says device is null. I'm not able to run sniffex.c program also. All I want to do is to capture the live network level packets and analyse them.
My network name is eth2 it was changed by some reason and now i got these errors... i installed, reinstalled, re re installed, tried to run the asistant but no luck :/
Code:
* Stopping the Firestarter firewall...
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
eth0: error fetching interface information: Device not found
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Installed Centos 5 on IBM T60P laptop. Intel 82573L Gigabit ethernet controller. Keep getting this erro message, "e1000 device eth0 does not seem to be present, delaying initialization."
View 3 Replies View RelatedI just finished installing Fedora 12 on a rack mount server. I was modifying the /etc/sysconfig/network-scripts/ifcfg-eth0 file to use a static IP address, but now nothing works. The device does not boot on start up or anything.Currently, ifcfg-eth0 looks like:
Quote:
DEVICE=eth0
ONBOOT=yes
BOOTPROTO=none[code].....
The eth0 device does not start on boot; the server does not get the IP address, is not reachable over the network, and will not connect to the internet....
I have swapped out four known working, different bran network cards. Each one I get the same error as in the subject. If I boot to a Live CD such as CentOs 5.3 LiveCD both Nics are given an IP. This seems to only be happening with my CentOs 5.3 server install.I noticed the CentOS Live CD the Nics were reversed from eth0 to eth1 and eth1 to eth0.
At the moment as of the output of the commands, I am running two identical Nics, since the first one has always worked. I have previously used an rtl8139, 3com c3905-TX, onboard Rhine III based (now disabled) Here are steps I have done to try and figure this out:
Quote:
[root@centos ~]# lspci | grep -i eth
00:0a.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 86)
00:0e.0 Ethernet controller: VIA Technologies, Inc. VT6105/VT6106S [Rhine-III] (rev 86)
Quote:
[root@centos ~]# cat /var/log/dmesg | grep -i eth
eth0: VIA Rhine III at 0xee800000, 00:1b:11:bb:17:7d, IRQ 177.
eth0: MII PHY found at address 1, status 0x786d advertising 05e1 Link 45e1.
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I went through the system-config-network-tui. I copied /etc/sysconfig/network-scripts/ifcfg-eth1 to the ifcfg-eth0 and edited for sanity. and as stated earlier, have swapped out four different nics for eth0, and booted to two different LiveCD's. Both LiveCD's work fine.
I am running a CentOS 5.6 as a Virtual Machine on my Laptop. And, to connect to internet I am using a datacard (usb modem) device (Tata Photon +).
Now, internet is working well on my VM through interface ppp0
The problem is that when I start my interface eth0, internet (running through ppp0) stops.
Quote:
[root@kick ~]# ip route show
172.29.242.9 dev ppp0 proto kernel scope link src 14.99.211.189
default dev ppp0 scope link
[root@kick ~]# ip addr sh
1: lo: <LOOPBACK> mtu 16436 qdisc noop
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Yesterday I did an upgrade and today my box is unable to connect to the internet.
I have tried another cable, it didn't help.
Basically NetworkManager does not connect eth0 to the network, if I try to run ifup from the command line I get:
Code:
I can see in network configuration settings, that the device has been correctly detected and eth0 interface is correctly activated, yet when I try to uncheck the box manage by NetworkManager and start it manually, it tells me that the cable is disconnected... I've tried two different cables, different ports on my router - no help.
I've looked today on my logs /var/log/message and I find device eth0 entered promiscuous mode I don't remember putting eth0 in promiscuous mode I'm connected to the net thru a router how do i turn that off ?
View 1 Replies View RelatedI use my T61 both wireless and in the dock, where I switch to the wired connection. After the latest round of updates, I seem to have lost the ability to switch to the wired network. When I turn the laptop on, I see it connect to the wireless network, but when I left click on the tray icon under Wired Network is says Device not managed. I have not made any changes to anything in the last couple weeks, besides some updates. How do I go about getting the wired network back in there?I tried to add eth0 back into System - Preferences - Network Connections, but whenever I try and add eth0, but it still says Device not managed.
View 2 Replies View RelatedThe problem I'm having is on a CentOS4 machine. I don't use CentOS regularly (Ubuntu and Mint, yes) so I'm not sure if this is something that is particular to CentOS or not. I have this workstation that controls a microscope controller. The drives in this computer are some POS Seagate drives where the data storage drive has already conked out more than once. I think this time there was a problem with the OS drive that caused a lot of filesystem errors. I wasn't able to boot the OS at first but I ran fsck from a liveCD and was able to fix the (hundreds of) errors and the OS can now boot from the drive. The problem ave now is the ethernet does not work. I know there's not a problem with the ethernet controllers because I can access the internet through the liveCD. When I try to activate eth0, or eth1, I get the following error:Quote:
Cannot activate network device eth0!
network-functions: line 180: ip: command not found
WARNING: /lib/modules/2.6.9-89.0.9.ELsmp/modules.symbols line 1: ignoring bad line starting with 'GROUP'
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5.10 Breezy configured as machine controller. Works great eth0 is a fixed IP to communicate with controller comms board. Not easy at all to alter - the comms board is hard coded to listen on eth0 for commands.
I can use eth1 as the default gateway and ping google.com, etc. But when I now attempt to communicate with the controller with netcat, e.g.
Code: echo !HH | nc 192.168.1.6 80
I obviously never get an answer since the request is passed via eth1. Using the -g option with netcat doesn't work either. I had a look at iptables but it doesn't seem to be able to do what I want. How I can still use eth0 as my communication port to the controller whilst eth1 is the default gateway?
I have two servers on a vlan at my datacentre/colocation and previously both servers had public IPs on their eth0 interfaces. The servers are HP ProLiant DL360s - one is a G4 and one is a G5 The newer G5 is now the LAMP server and the G4 has been retired and I want to repurpose it as an iSCSI target using openfiler freenas or similar.
My G5 has public/static IPs lashed to the eth0 physical interface and the eth1 is not configured to do anything yet. The G4 will have both interfaces available - perhaps one for ssh access from one of my static public IPs and the other to be a private IP on the local vlan. Here is what I am trying to get my head around...
The G5
eth0 - Public IP - full LAMP services on two or three virtual interfaces
eth1 - Private IP 192.168.0.1
The G4
eth0 - Public IP for ssh
eth1 - Private IP 192.168.0.2
Because my traffic between eth1 on these boxes is via private IPs on the local private vlan it doesn't add to my quota for bandwidth. How do I go about configuring the routing and gateways and other aspects of this so that I can run a private IP space network between the eth1s and still serve the outside world from the eth0s...
I am afraid that if I assign the private IPs to the eth1 interfaces the routing may either not work or interfere with the access to the production internet facing interfaces (eth0s).
I'm running a dual boot Ubuntu 10.04/Backtrack 4 (Ubuntu 8.10) system. I can get internet in the BT4 side but not in the Lucid side. In Lucid I can ping my router, and the network manager says I'm good to go, but I can't get to any web sites. It all started when I tried to put my laptop on another network by mimicking the settings of a computer I had just unplugged from the network. MAC address and all.
ifconfig eth0:
Code:
eth0 Link encap:Ethernet HWaddr 00:1f:16:ba:4c:8c
inet addr:10.136.9.147 Bcast:10.136.9.159 Mask:255.255.255.240
inet6 addr: fe80::21f:16ff:feba:4c8c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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I am running Fedora 13 and after my machine is booted my ethernet interface eth0 does not have an IP address. Running
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At the terminal does not work, and I can see that in /var/log/messages I have the following error:
Code:
I assume that the same command was attempted during the boot process (please correct me if I am wrong) to use DHCP to get an address for eth0, but failed for the same reason it is failing after boot when I run it manually, whatever that reason may be.
I noted, however, that eth0 IS in broadcast mode:
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I also noted that running
Code:
Does in fact work and will run DHCP and configure eth0 with an ip address.
It is quite mysterious to me why running 'dhclient eth0' will work, but manually running 'dhclient' does not.
Had a problem getting my internet connection working with Ubuntu, but I resolved that issue. Problem is I still have to manually run dhclient every time Ubuntu boots, because I have no network unless I do. Is there a script or something that can do this automatically?
View 1 Replies View RelatedI am seeing the following error on a linux client..
daemon.info dhclient: No working leases in persistent database - sleeping
is this a problem within the client or related to interaction with DHCP server?
I got a full system crash each time I try to do anything with network. Been fighting with this problem for weeks now. What I did: -tried every driver for broadcom4312 and it turned out that it even crashes with cable net
-got rid of networkmanager
(
Mar 11 08:01:43 geburah NetworkManager: <info> Activation (eth1) successful, device activated.
Mar 11 08:01:43 geburah NetworkManager: <info> Activation (eth1) Stage 5 of 5 (IP Configure Commit) complete.
)
used:
ifconfig eth1 up
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Code:
Commands as root works well when normal user is logged in and connected to net via KDE 4 network manager, but after logoff network is gone. And it is impossible to get it back because command mentioned above stops working!
I have just installled fedora, and I am puzzled by dhclient-script. Because it gives the router ip as nameserver 192.168.0.1. I have had other linux distro on same machine that resolves the correct nameserver without any configuring.
Does anyone know how to get your ISP:s nameservers instead in /etc/resolv.conf when running dhclient from CLI? I have thought about edit /sbin/dhclient-script. But if that is the case. Which option should I edit?
Quote:
My system
OS=Fedora 15
Kernel=Linux fedora_15 2.6.38.8-32.fc15.i686.PAE #1 SMP Mon Jun 13 19:55:27 UTC 2011 i686 i686 i386 GNU/Linux
Router =DLINK dir 100 (IP 192.168.0.1)
For test purposes I'm running Ubuntu 10.10 from a USB stick with a USB WLAN stick.The system finds the WLAN router and acquires an IP6 address, but no IP4 address.With "dhclient wlan0" though it does get an IP4 address and connects o.k.How do I setup the system so that this dhclient call is done by the system at startup (or whenever it is necessary)?
View 1 Replies View RelatedI have a simple server running Ubuntu Server. Usually the server connects to the network by Wifi, so there is usually no cable connected to the Ethernet port. I noticed that there is a dhclient3 running on eth0 anyway. It is causing undesirable disk activity. Obviously, it is never going to get a response as long as no cable is connected. I can kill the responsible process manually, but I wonder first what is starting the process and how I can prevent it from being started. If there is a way to get the server to boot without starting this process, I wonder whether this is the right solution. Connecting to the network by Ethernet is the failsafe when Wifi doesn't work. I guess what I would like to see would be a way for the server to detect when eth0 does not have a cable connected and not start dhclient in that case, but to activate dhclient when a cable is connected.
View 4 Replies View Relatedi've configured the machine to use a static ip yet dhclient still runs and obtains an ip. what needs to be done to stop this? it has to be something i can put in a script since i have written a setup script to run on several machines. this setup script creates/modifies several files with a few key ones shown below:
/etc/sysconfig/network
Quote:
HOSTNAME=csec7154
NETWORKING=yes
NISDOMAIN=csma
NTPSERVERARGS=iburst
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and the files, hosts, resolv.conf, network and ifcfg-eth0 in the /etc/sysconfig/networking/profiles/default directory all link to their respective files as does /etc/sysconfig/networking/devices/ifcfg-eth0. thanx!
I have the following system
# cat /etc/redhat-release
CentOS release 5.5 (Final)
# uname -r
2.6.18-194.32.1.el5
when I first installed it on my IBM thinkpad, the eth0 was working correctly. I had someone try to install the network card for me, and something was changed to where now the wired connection is displaying "device not managed".
View 2 Replies View RelatedI am trying to perform VM cloning using KVM in a centos 5.6 machines. I copy the memory contents of a running vm to an external state file and try to use that to start another VM in a different machine. While starting the cloned VM I provide a different mac address but once it resumes it has the old one . I tried changing the mac address in ifcfg-eth0 but I get the error: Device eth0 has a mac address xx:xx instead of configured xx:xx.Ignoring .
Is there some way to change the ip/mac of the cloned vm without the need to restart the VM ( Then the purpose of cloning will be defeated). Thanks a lot for the info.
