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 Replieswant to monitor network traffic with ntop from a Lucid 10.04 machine. Both NICs have picked up an IP address, I need to put one in promiscuous mode. I typed sudo ifconfig eth1 promisc and the response was SIOCSIFFLAGS: Permission denied
View 1 Replies View RelatedI need to route packets coming from a standalone switch port which is a mirror ("tap") of another port ("source"). I can't seem to forward packets whose MAC address is for a different device (the actual "target" of "source"). My device is in promisc mode,I can see the incoming packets in tcpdump and Wireshark. The only packets which get forwarded are those which have my MAC destination address (I changed the wiring to come straight from source and not the mirror port, to get "my" MAC address in the packet). My routing table is configured to forward and I have ip_forwarding enabled, obviously (otherwise packets sent to my MAC wouldn't route). By the way, the incoming packets are all VLAN tagged and I have matching subinterfaces.
Q1 - is this inherent, that packets won't get "passed up" to the IP layer unless the MAC addresses match?
Q2 - Would ebtables be a good solution, i.e. rewrite the dest MAC address to my own MAC addr and send to the INPUT target?
what entry do I have to add to my ifcg-eth1 file to put the "nic" in promiscuous mode?
PHP Code:
# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)
DEVICE=eth1
HWADDR=00:00:00:00:00:00
ONBOOT=no
HOTPLUG=no
should I add PROMISC=ON
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
[code]....
I want to configure eth0 and eth1 in bonding mode with 2 vlans each (sam existing vlan 100 and 200)configured on 2 Cisco switches. How can I go about that? I got the following procedure for bonding from the internet, is it right?
1. Add the below lines to /etc/modprobe.conf alias bond0 bonding options bond0 mode=1 miimon=100
2. Create bond0 device file, /etc/sysconfig/network-scripts/ifcfg-bond0 with the following content:
DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
NETWORK=192.168.122.0
NETMASK=255.255.255.0
IPADDR=192.168.122.118
USERCTL=no
[Code]....
im trying to setup eth0 with subdevice eth0.0 and eth0.99 to come up at boot
eth0 is dhcp clint
eth0:0 is static ip
eth0.99 is 802.1q vlan interface
/etc/network/interfaces
Code:
auto lo
[Code]....
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 RelatedI am trying to do something outlandish with iptables (or so I think!).I have a source sending udp packets to a destination (say dst11). Using port mirroring I am able to get all these packets to a different machine (say dst22). I am able to see these packets on dst22 interface using tcpdump.I want to analyze the packets on dst22. So what I do is put dst22 interface in promiscuous mode (using ifconfig eth0 promisc). This in theory should get the packet through the MAC layer. Now using iptables I am trying to DNAT the packets in nat prerouting to change the packets destination IP to dst22's interface and change the destination port.
View 2 Replies View RelatedI attempted to install Catalyst 10.11 for my ATI HD 2600XT and the system now only displays lines and a large block of pixels where the mouse would go. CTRL-ALT-F1 kills the system and does not provide a command prompt. This is a single installation, not dual-boot, but there is no Press Esc to access the Grub menu during startup so I cannot choose safe mode. I attempted to get into Recovery mode using the flash drive that I used to install the system and it tells me there is no Recovery kernel (I used the 64-bit Desktop installer, not alternative). Does anyone know an alternative to get into the Grub menu other than ESC during bootup? Alternatively, do I need to download the 64-bit Alternative ISO and create a new boot disk with it so I can access Recovery mode? Is there something else I'm not thinking of?
View 5 Replies View Relatedwhen 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 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....
When i wan to activate device in network configuration, it pop out with "CANNOT ACTIVATE NETWORK DEVICE ETH0". There is a sentence after this also : "rlt8129 device eth0 does not seem to be present, delaying initialization."
View 14 Replies View RelatedYesterday 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.
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).
If I uncheck and recheck "Enable Networking" in the Network Manager Applet 0.7.996 I would expect the wired network to disconnect (which it does) and reconnect (which it does NOT). So I tried sudo ifdown eth0 and got
Quote:
Ignoring unknown interface eth0=eth0.
ifconfig tells me
Quote:
eth0 Link encap:Ethernet HWaddr 00:25:64:e8:18:2c
inet addr:192.168.0.112 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::225:64ff:fee8:182c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
so I am at a loss. How do I stop and restart the network interface short of rebooting the machine?
I got two IP's in my dedicated server. Both are external IP's. I would like to make connections using 2nd IP address under eth0:0 interface. For example: when using "lynx whatismyip.com" should display my 2nd IP. How to do this using iptables ?
View 1 Replies View RelatedBelow is a print out of my partition Table from Fdisk, in Cylinder mode, Sector mode, and then in expert mode?
Why in expert mode does it look like Partitions 2 and 3 share the same sector / hd / Cylinders? Is this OK?
Code:
On my machine (Desktop PC) I have 2 network card : wireless (rt61 802.11) and a wired card (BCM44). When I install debian 5.
The wired card is detected and logical name eth0 is assigned, while wireless is not assigned I install firmeware* software to configure the card. It is done in some way ( I used mnetwork from mepis, it works fine).
Now the problem: eth0 disapears, and no eth0 inteface found? ifconfig gives just wlan0.
Question: Why there is no eth0, it was before configuration of wlan0 ?
How to active again eth0, or ho to create the logical eth0?
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
[code]....
I'm not sure how long ago this happened but eth0 seems to have vanished from my computer. wlan0 works fine and when I plug into the switch there is carrier detect.
Code:
21:35:43 ~:$ ifconfig eth0 up eth0: ERROR while getting interface flags: No such device
21:55:49 ~:$ lspci 05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05) 07:00.0 Network controller: Intel Corporation Ultimate N WiFi Link 5300 After that i have no idea where to search for problems next, any ideas would be greatly appriciated (can't spell) ubuntu 10.10
I have my X11 setup configured to rotate 90s counterclockwise for a portrait monitor. But when the system turns on, it's in the framebuffer console which is set to landscape mode. Is there a way to set it so that even the console is rotated in portrait mode? I'd like to do this automatically.
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];
[Code]...
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.
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.
View 2 Replies View RelatedI try to generate a server client code. What i try to do is sending video streams from eth0 and eth1 to the other server programs' eth0 and eth1. In order to do that, i decided to use SO_BINDTODEVICE. But the code is not working. Am i misunderstood the usage of SO_BINDTODEVICE.
1-Defining two ports
2-Defining two sockets
3-Assigning host ips on them
[code]....
How I do detect the usb device when I'm on cli mode? This is possible or not?
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.
i have 5.4 installed on a super-micro server motherboard (has two gigabit ether ports). when i boot while its initializing everything it gets to the "starting eth0" and just stays there?
right before it boots up and says press any key for options i press a key and choose "centos (2.6.18-164.el5)" and it boots up fine but when i choose "centos (2,6,18-164.el5xen)" the problem occurs. and that is the default boot option.
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 Related