CentOS 5 Hardware :: Realtec Ethernet Card Assigned Wrong MAC Address - Fails?
Dec 17, 2009
I have an HP Pavilion A6750F with an AMD Phenom 9650 Quad Core. 8 GB memoryThe NIC is a REALTEC Semiconductor RLT8111/81688 PCI Express Gigabit Ethernet Controller.The actual MAC address for the NIC is 00:24:21:55:DE:40I have loaded CentOS 5.3 on this host three of four times in various configurations and patching levels.THE PROBLEM: The system identifies the NIC as having MAC FE:FF:FF:FF:FF:FF.When this happens, the network connectivity obviously stops working.It identifies everything else OK, just maps the wrong MAC.I'm no sure how to troubleshoot this problem. I tried rebooting a couple times and once that fixed it. Usually it does not. I reloaded (gasp) Windows Vista on it and it worked ok.This last time, I reloaded CentOS it hung on the bootup (ASK ??), I reset it, it rebooted and everything looks ok; for now.
The system says it is presently using driver r8169
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May 26, 2011
I have a server hosted with Hetzner in Germany and have had it there for over a year now without any glitches. Last week very abruptly they deactivated the server giving me a very vague reason of "I was using another IP that was not assigned to me". After several calls I had the server reactivated but am still puzzled by this and Hetzner Germany has been unable to provide me with any proof, logs, traces or anything for that matter to validate their claims.
My primary (physical) server has one IP allocated (static) and IPv6 is turned off. On top of this server I run 3 VMware servers, 1 Ubuntu, 1 Debian, 1 Windows and all 3 of these VM's have static IP's configured.
I've done traceroutes, netstats and looked through every single config file with a fine toothcomb without finding anything and the problem has not reoccured either.
What I would like to know is if there is some way that someone could craft an attack of some sort that could cause a server to do this, to latch onto another IP not assigned to its NIC?
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Nov 18, 2009
I'm stumped here as it seems like after an update etho:0 has assigned itself 2 x IP Addresses. I don't understand how this happened or how to fix it so some help would be great as I cannot access cPanel while it's like this or my sub directories.Here is a print of ifconfig
-bash-3.2# ifconfig
eth0 Link encap:Ethernet HWaddr AA:01:5F:9A:FE:26
inet addr:95.154.254.38 Bcast:95.154.254.38 Mask:255.255.255.255
[code]....
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Jun 10, 2011
How to find the Address which is already in 2632 port?
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Jun 22, 2010
In my red hat Linux machine there was a Lan card using eth0. IP is asign to that network card and it is functioning properly. I add another ethernet card in my linux machineit was detacted and when i use the commandQuote:[root@localhost root] # ifconfig -ait show me both eth0 and eth1 lan cards.I can see Ip address in my eth1 ethernet card but When I enter into
Code:
[root@localhost root] # cd /etc/sysconfig/network-scripts
and i use ls command it only show me the file ifcfg-eth1 and with
[code]...
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Apr 24, 2010
Consider the following program:
Code:
#include <stdio.h>
#include <stdint.h>
[code]...
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Jul 7, 2011
it was working but after i installed updates and rebooted it could not get a ip address seems like strange timing it still registers under ifconfig it is not even working on the live usb anyway i can test to be sure it is the chip?
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Sep 13, 2010
I've installed from the CD the Centos version 5.5. When I try to connect to Internet I can't because I received some errors. I've the Intel Corporation 82801CAM (ICH3) PRO/100 VE (LOM) Ethernet Controller also a wireless slot (I've the wireless card DWL-G650+) When I turn on the pc and I go to "Ethernet Device", I see set: peth0 (Intel Corporation 82801CAM (ICH3) PRO/100 VE (LOM) ETHERNET CONTROLLER) and also set "Bind to MAC address": fe:ff:ff:ff:ff:ff I've set manually the IP address (I'm under router). Status is "Active" but can't go on the Net. When I change to "eth0 (Intel EtherExpress/100 driver)...sometimes become "Active" an other times said that the MAC address is different or to check the cable because can't find the IP. What can I do?
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May 4, 2009
I am using asus p5ld2-x/1333 motherboard,I installed the centos ,Centos saw other drivers but didn't see ethernet card.I am not connection the internet.
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May 19, 2009
i did configure as it was advised on [URL]... but it didn't work. for eg I added eth0:1 and eth0:2 on /etc/sysconfig/network-scripts/ when i do ifconfig i can see only eth0:1, i cannot see eth0:2, eventhough i configured as it was on the tutorial
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Feb 9, 2010
I am attempting to install centos5 x86_64 on to an HP Compaq 6820s laptop.It appears the installation has gone ok but I have a big problem in that the centos installation knows nothing about the hardware on the laptop. i.e. it does not recognise the eth0 ethernet card.this means that I have no way of assigning an IP address to the laptop which means that it cannot join the network or the internet.how do you go about getting the correct drivers for the hardware that you are using?
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Jun 7, 2010
I recently installed CentOS on a really old computer and while most things are running well, I am unable to connect to the internet. Using a Damn Small Linux live CD I am able to connect just fine and was able to see that that 'hp100' was being used as the netcard driver. When I tried to set up the network card using that adapter (HP10/100VG ....) it gives me the following error code...
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May 29, 2014
I have 2 PCs, each running Oracle VirtualBox with about 30VMs installed and standing on the same table
On shopping router I found TP-Link
TL-WR741ND
150Mbps Wireless N Router
[URL] ....
How can it assign 30 IP address to each PC?
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Aug 13, 2010
I would like to create several aliases to eth0, but have the addresses assigned by DHCP instead of being set to static IP's. Is this even possible? All the examples I've seen assign a static IP using the command:
ifconfig eth0:0 192.168.1.11 up
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Aug 7, 2011
I am just trying to get SSH working between 2 local machines on OpensSuse 11.4 boxes. I have the SSHD daemon running, the firewall is configured to allow SSH to pass, and I am using SSH's password authentication. However, my machines cannot see each other. Anytime I try to SSH, I get "Could not resolve hostname<hostname>: Name or service not known."
Of course, that leads me to believe I need an entry in my /etc/hosts file. However, I use DHCP, and therefore have a dynamic IP address. Therefore, my hosts names will only be good until the next IP renewal. How in the world do I configure SSH with a DHCP assigned address?
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Feb 26, 2010
I have installed trixbox 2.8.0.3 in Intel MAC mini PC, installation completed successfully. After reboot network card was not detected.
My MAC mini PC comes with nVidia Corporation MCP79 Ethernet card. how to enable Ethernet card with out affecting the tribox. trixbox-2.8.0.3 version comes with Cent OS 5.4. [Moderator edit: s/deducted/detected/]
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May 29, 2011
how to assign a address to my ethernet card all the options available
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Feb 8, 2011
I am basically wanting to use my Ubuntu 10.10 computer as a router. Note: Before you say just get a router please note that I am poor/cheap. I have two ethernet connections and one wireless connection on my netbook. I want to share the internet connection that is going into one of the ethernet cards through the other ethernet card and the wireless card.
DSL-->1sr Eth --> 2nd Eth (currently works)
DSL-->1sr Eth --> Wireless Card (Adhoc) <--(connects with limited connectivity AKA no internet)
The 2nd Ethernet card already has working internet, but when I connect to the Wireless card (through an Adhoc network), it cannot get an IP (I believe).
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Jun 18, 2010
I installed the Centos 5.5 and after the Xen. After I put a virtual machine named VM01.Initially it worked properly, I tried everything and it worked.When rebooted, I had problems with the network.I have two network cards eth0 and eth1, but eth1 does not have any ip and I use only eth0.The error that appears is:
vif0.0: received packet with own address the source address
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Jan 26, 2011
My environment is RHEL5. For the sake of discussion, I have two systems, each with multiple ethernet ports.
To simplify the discussion, let's say each computer has two ports. One port is the "public" ethernet (eth0) and the other is the "private" (eth4) ethernet.
All the boot activities must occur on the private site, and to a point this works well. DHCP works, the pxelinux.0 file is transferred (seen using wireshark) and the client appears to bootstrap, when the bootstrap restarts the DHCP handshake using the wrong ethernet port (eth0).
The client does NOT get far enough along to read the client's configuration document under pxelinux.cfg.
How do I instruct pxelinux.0 to use eth4 and not eth0 to continue the boot process?
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Dec 4, 2010
I have two machines
1. Ubuntu (static IP 192.168.1.1, running dhcp server)
2. Windows 7 (dhcp assigned IP based on mac - >192.168.1.2)
Now when I fire up both machines, Linux assigns IP to win BUT they dont ping. From ifconfig I know:
eth2 Link encap:Ethernet HWaddr 00:1b:21:7b:2d:68
inet addr:192.168.1.1 Bcast:192.168.1.3 Mask:255.255.255.252
inet6 addr: fe80::21b:21ff:fe7b:2d68/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[code]....
Now I get time exceeded icmp every time I try to ping both from linux OR windows...
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Dec 4, 2010
Just installed Fedora 14 from the Live CD i686 on my Dell Inspiron 1521. I can't connect to the SpeedTouch 585 on either wireless broadcom card or the wired Ethernet card.
I can connect to it from the same Laptop on the Vista which is on dual boot on the same laptop.
Further confusing is that I ran Fedora 14 and connected to another SpeedTouch today.
Already checked the Channel on the wireless nic and it's on the same one as the SpeedTouch.
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Oct 3, 2010
I'm new to the whole linux os, but since I have it on school, I decided to instal it on my laptop. everything works, accept I have no sound what so ever.. I installed Alsamixer, and nothing is muted.
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Mar 14, 2010
my network expertise is tenuous at best. This started because one computer on my network is having trouble updating Google Toolbar information. This is a laptop which joins other wifi networks outside of the house.
Code:
BROKEN:~$ ping toolbar.google.com
PING toolbar.google.com (208.68.139.89) 56(84) bytes of data.
[code]....
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Mar 17, 2010
I updated Kubuntu from 8.10 to 9.04. After the update, I saw a problem with VPN connections. I am using an mac pro with 2 ethernet ports. Only one of them is connected to switch. I am using a static IP in my local network. The problem is that I lose dns information after connecting and disconnecting to a VPN by KVpns.As I am using static ip, I entered my dns server to resolv.conf file with "nameserver 192.168.128.4". My interfaces file is as follows:
auto lo
iface lo inet loopback
address 127.0.0.1
[code]....
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Feb 16, 2011
I'm trying to get dhcpd to use a specific IP address as the source address for responses it uses an IP address for. I coded "local-address 172.30.0.4" in the config file. For some responses it uses this address. For some other responses it does not. In those cases it uses the IP address that is the first on the interface. Is there another configuration I should be using, instead?
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Aug 23, 2010
I have loaded Suse 10.3 on a system that has 4 Ethernet ports, all Intel chipsets. 2 ports have the 82571 chipset, 1 port has the 82573 chipset and the last one has the 82567. The 82567 chipset can use the e1000 driver and the 8257x chipsets require the e1000e driver. We are only actually using the 82571 ports.
When the system is booted, the 82567 seems to get bound to the e1000 driver and the 82573 gets bound to the e1000e driver. Doing an "lsmod" I see both drivers loaded. It appears the 82571 drivers are getting bound to the e1000 driver which is a major problem. They work for a while but eventually they lock up with enormous error counts according to "ifconfig". How I know the e1000 driver is bound to the 82571 ports is that when I remove it(modprobe -r e1000) and then try to use one of them, I get a "network unreachable". When e1000 is loaded these ports seem to work fine. I tried modding the file in /etc/sysconfig/hardware that corresponds to the PCI address of these ports(i.e., hwcfg-bus-pci-0000:08:00.0) to force the module to e1000e, but no luck there either.
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Jan 2, 2011
Something is definitely odd here:Quote:
[rena@mercury:~ 500]
$ hostname
mercury
[code]....
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Jun 8, 2010
I have a usb device that is setup to use a networking interface. When I connect the usb device, ifconfig automatically shows a new interface "usbX", and it has an assigned IP address, e.g. "192.168.X.1" - yes, the "X" is the same number between the address and the interface name. Each time I connect the usb device, it gets a different ip address...
192.168.9.1, 192.168.10.1, etc (actually the device address ends in .2, the PC is .1)
How do I configure this device to always have the same address? Or maybe it's more accurate to ask, how do I configure linux to always assign the network address with this device?
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Nov 23, 2010
How do you get correct ethernet/mac id of your local network card using python script? Most of the article suggests to parse the output of ipconfig /all on windows and ifconfig on linux. I am sure that this solution would work on windows but I am a linux starter and not sure the reliability of ifconfig on linux distros. Couple of other solutions on linux are:
Code:
def getHwAddr(ifname):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
info = fcntl.ioctl(s.fileno(), 0x8927, struct.pack('256s', ifname[:15]))
return ''.join(['%02x:' % ord(char) for char in info[18:24]])[:-1]
[code].....
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