CentOS 5 :: Create A Fake Eth2 Network Adapter?
Jul 5, 2009
I am running 2.2.4 and CentOS 5.3 (RHEL 5.3 clone). I have two Ethernet cards: eth0 and eth1. Eth1 is connected to the Internet; eth0 is connected to all my virtual machines; iptables connects eth1 to eth0.
A new machine I am adding needs to be off eth0 and eth1 (security reasons). Question: is there a way to make up a third fake Ethernet card that I do not physically have (eth2) and assign it to my new VM? How do I do this? Can I get away with some thing like this?
$ pwd
/etc/sysconfig/network-scripts
$ cat ifcfg-eth0
DEVICE=eth2
BOOTPROTO=none
BROADCAST=192.168.255.255
[Code]...
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Nov 11, 2010
I m facing problem in creating virtual network adpater. I want to have multiple mac address for a single NIC.
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Jun 15, 2010
How do Linux identify the eth0, eth1, eth2 interfaces. For instance I plug in a network cable in to an interface. How do Linux recognize the plug in interface is eth0 or eth1?
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Jul 3, 2010
I need to set a NAC (PacketFence) system (CentOS 5.5), i would like to set in my case eth0 to work with several different VLAN'S i created ifcfg-eth0.2 copied from orginal ifcfg-eth0 and changed the ip and append VLAN=yes but when i am triyng to load ifcfg-eth0.2 i get error
my ifcfg-eth0 goes as follow
# Intel Corporation 82578DM Gigabit Network Connection
# Normal VLAN Lan adapter (Managment)(On-boad 1st NIC)
DEVICE=eth0
[code]....
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Apr 26, 2010
I felt the urge to build my own "Incredible PBX" system, and in the process downloaded pbxinaflash-i386-5.4.iso which is based on CentOS 5.4. The PC that I'm using is an old desktop, and the onboard ethernet adapter is not working, so I installed Trendnet PCI Adapter (te100-pciwn h/w : 2.2 R), which used to work greatly under Windows XP. Since my on-board ethernet adapater doesn't work, I disabled "eth0" device, and I modified eth1 device to load during boot. But, for whatever reasons, eth1 fails to get the IP address. I thought the driver that is part of CentOS 5.4 may not be working, so I thought of building the driver from the files provided in the CD (that came with TrendNet adapter box).. and unfortunately my attempts to build the driver have also failed.
Following files are attached in the zip file
- basedata.R3721 (info collected by ./getinfo.sh all )
- Directory 2.2.X has "te100.c, makefile, kern_compat.h copying.txt" (These files came with the Trendnet CD)
- errors (makefile errors when tried to build te100 driver)
From what I understand, TrendNet TE100-PCIWN is based on "Realtek Semiconductor Co., Ltd. RTL-8139" chipset. How to get my ethernet adapater (eth1) connected to internet.
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Feb 28, 2011
Installed CentOS 5.5 on VMware ESXi server running vsphere 4.1. Installed fine and picked the E1000 network adapter. But can't get the adapter to become active and pick up an IP address. Has anyone done this before? I can't get it to work. When i was testing CentOS out i used VirtualBox and worked fine using bridged networking but just can't seem to get this network card working.I've put some pictures of the config i've got.http:[url]....
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Feb 27, 2011
I have a CentOS 5.5 server running currently with a Netgear gigabit ethernet card and for wifi I have a wi-fi card with the chipset: RT2860.Now I have gotten the ethernet card and wi-fi card working but my main question is: How do you bridge the connection between the ethernet card and the wi-fi card to create a wireless network with a hidden ESSID if possible and WPA encryption? (So the server basically acts as a wireless router as well as doing all the other stuff I need to do on it).
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Apr 30, 2010
how can i change the eth2 to eth before this I have 3 nic. eth0 , eth1 ,eth2.. then I remove the eth2 nic, so, how can i change eth2 to eth1..
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Feb 17, 2011
I have been googling for three days, and I though posting to a forum would be more helpful than throwing my box out the window.
[Code]...
I was able to bond eth1 and eth2 together as bond0, but I am having problems with setting up two gateways on bond0. I can set one (eg ISP1) and all the traffic always routes through that ISP. Thus defeating the purpose of bonding. eth1 and eth2 pull an ip just fine and were able to ping the internet before bonding. Originally, I set the bond0 ip to the same subnet at my internal network, but I read that in order to set up nat you need to have the adapters on two seperate subnets.
Every time I fix one issue with this scenario something else breaks. I have tried dozens of different configurations. I am relatively sure that it is just a routing table issue, but I was wondering if anyone could point me in the right direction.
[Code]...
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Jul 3, 2010
I need to set a NAC (PacketFence) system , i would like to set in my case eth0 to work with several different VLAN'S i created ifcfg-eth0.2 copied from orginal ifcfg-eth0 and changed the ip and append VLAN=yes but when i am triyng to load ifcfg-eth0.2 i get error
I must missed something
My ifcfg-eth0 goes as follow
Code:
My ifcfg-eth0.2 goes as follow
Code:
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Sep 14, 2009
A node on a cluster that our lab has had sitting in a dusty room since time forgotten does not seem to want to talk to the rest of the world any more.Following is the information I found was being asked for on other posts for similar questions, transcribed by hand.
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Nov 27, 2010
The Fedora 13 Visualization guide mentions the ability to use "shared physical device" to give virtual guest full access to a network device. Where can I find more info on setting this up. When installing my first guest, the drop down menu didn't supply this as an option. Eth0 and Eth1 were not selectable (e.g. grayed out).Is there a better section to ask KVM related question? If so, I'll move there.
I'm setting up my first KVM guest now, played aroudn with VMware briefly. I did spend a lot of time wtih VM on mainframes (yes, I'm old)... and from my research, KVM is "catching up" with what we could do in the old days.
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Jan 22, 2011
I decided to install Ubuntu 10.10 64bit on my desktop computer so it would run alongside Windows 7.Everything works fine except I cannot get it on the Internet. I use a wireless network adapter (Linksys AE1000 Wireless-N) to connect to the internet on Windows 7. I have been reading forums this entire day and it's gotten me to the point where I'm about to throw my desktop out the windows!!! Please help me as I want to use Ubuntu. I have my Adapters installation CD if needed.I've already download the NDISGTK along with the other two things it comes with. I used my Ubuntu CD as a source to download the files. I went to System>Administration>Wireless Network Drivers, and I put my network adapter's (Linksys AE1000) software CD in the CD Drive. I clicked "Install New Driver and went into the XP section (as none of the others worked, and it says "rt2870, Hardware Present: Yes)
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Apr 19, 2011
I have Backtrack4 installed as a dual boot with Vista in my Acer Aspire 5315 laptop. I can connect to my access point with my inbuilt wireless Atheros AR5007EG wireless adapter by starting services/network and WICD. The problem I have is connecting my Alfa network RTL8187 wireless through WICD or wireless assistant. My Alfa network adapter works fine as I have used it with Aircrack-ng in BT4.
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Jun 1, 2011
I am having problems seeing SAS drives using Supermicro AOC-SAS2LP-H8IR adapter. The operation system is CentOS 5.6 64bit version. The operation system is installed on a SATA drive and the motherboard is an Intel Board "Classic Series" "Rockfish" G43 - Socket LGA775. From the OS I cannot see the drives. BIOS does see the PCI card and it ends there.
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Dec 22, 2010
After had installed opensuse 11.3 I am about toset a usb stick and connecting to internet. I can connect with ethernet but as I want to have also wireless internet I bought a LEVELONE WUA-0605 wireless usb adapter witch I can't setup and connect...
The only data witch I was able to find are:
linux-0wi7:~ # hwinfo --wlan
21: USB 00.0: 0282 WLAN controller
[Created at usb.122]
Unique ID: 2UT6.NomXlQ88uo3
Parent ID: k4bc.9T1GDCLyFd9
SysFS ID: /devices/pci0000:00/0000:00:1d.7/usb1/1-3/1-3:1.0
SysFS BusID: 1-3:1.0 .....
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Aug 11, 2011
I Have an HP Pavilion G6. I recently installed openSUSE after having no luck with another linux distribution. I was told openSUSE is more compatible with laptops, so I figured I'd give it a try. I am now facing the same problem I had been facing w/ the other distribution (Ubuntu). My Network Adapter doesn't seem to be recognized by any linux operating systems. It is a Ralink 802.11b/g/n WiFi adapter. When I open the "network" tab, my home wifi is not listed, nor are any around me. In fact, I can't even open the "wireless" tab.
I've installed any recent drivers for my adapter, and I went to extensive lengths to try to solve the issue on my previous linux distribution. I don't know what output to give you from the terminal, nor do I really know any commands to look for anything. On a side note, I had been messing with my touchpad application, trying to set my preferences. I check the boxes for horiz. and vertic. scrolling with two fingers, and apply. They don't work. I check the boxes for using two finger tap to do something, and three finger tap to do something else.
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Jan 3, 2010
Basically a few weeks ago I decided to try Linux, in particular Ubuntu. I have it installed in my Windows 7 partition but now I am willing to take the full plunge and switch to it all the way. The only issue is I cannot connect to wireless internet. It states "device not ready". Wireless is turned on on my laptop, I am very near the source, have tried making a manual connection with the network setup. I tried the hardware tester and it found my ethernet and wireless hardware (Broadcom 802.11g Network Adapter).
I went to the package thing and looked for Broadcam. I found a package but it was already installed. I tried it manually with:
sudo apt-get install bcmwl-modaliases
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
I then heard to try "sudo apt-get install bcm43xx-fwcutter" and did but it couldnt find it.As stated before I am new to linux so I'm probably missing something easy I just beg your patiance as I learn this new operating system.
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Jan 7, 2010
I have a Belkin N150 USB Wireless Network Adapter and a Belkin N150 Wireless Router. I cannot seem to get NetworkManager to connect to the internet. I have blacklisted the 9.10 staging driver and associated rt files. I have downloaded and built the ralink 2.3.0.0 driver. The light flashes on the usb but I cannot connect to internet.
lsusb output:
jerry@jerry-desktop:~$ lsusb
Bus 002 Device 003: ID 413c:2105 Dell Computer Corp. Model L100 Keyboard
Bus 002 Device 002: ID 046d:c50e Logitech, Inc. MX-1000 Cordless Mouse Receiver
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 046d:09c2 Logitech, Inc.
Bus 001 Device 005: ID 050d:935b Belkin Components
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
lsmod output:
jerry@jerry-desktop:~$ sudo lsmod
Module Size Used by
rt2870sta 554908 1
iwconfig output:
jerry@jerry-desktop:~$ sudo iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
ra0 Ralink STA ESSID:"11n-AP" Nickname:"RT2870STA"
Mode: Auto Frequency=2.412 GHz Access Point: Not-Associated
Bit Rate:1 Mb/s
RTS thrff Fragment thrff
Encryption keyff
Link Quality=10/100 Signal level:0 dBm Noise level:-97 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
I am not sure what the ra0 is telling me but what about the Access Point: Not-Associated statement? Does that mean that the network adapter is not connecting to the router?
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Apr 20, 2010
I'm trying Ubuntu for the first time; it's actually the first time I've messed with Linux at all-- and, well, it's kind of intimidating. One of my hobbies is playing with dead computers, and long story short, I have Ubuntu installed to a partition on an external drive connected to an older Dell desktop with no internal storage to call its own. The only network adapter I have to spare right now is the rather wimpy USB one that came with said desktop. I have the CD with the drivers to it, but I think the Linux drivers on it are for a different distribution. Am I going to need to scrounge up another network card or adapter, or am I going to have to start sheepishly asking ridiculous questions regarding basic operation of the command console?
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Oct 20, 2010
I just started using Ubuntu 10.10 recently. and Im not really sure how most of this stuff works. I could probably figure most of it out myself, but I have a question about using a wireless USB stick for internet.I do not have internet on my desktop (the computer with linux on it) and the only way i can get it is by using a Dynex Wireless G USB Network Adapter.
I do not have the disk for it. and Im guessing linux doesnt have the autoinstall thing that windows has (no offense to linux, im starting to love it more than windows). I have the driver for it on my windows computer. I was wondering if i could run the driver from a usb thumb drive.If not, then how can i get the network adapter to work?
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Aug 17, 2010
We need to fina a wireles adapter that works with Ubuntu.We have a netgear adapter but the OS doesn't recognize it when we plug it into the USB port and there isn't software to install so it will recognize it - only Windows documentation.My daughter loves this OS and wants to keep it but can't connect to our wireless network without an adapter.
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Sep 2, 2010
my new N Wireless USB Network adapter which I have reacently bought does not seem to install on Ubuntu 10.04, I insert the CD into the computer and it doesn't AutoRun or load up manually.Running: Ubuntu 10.04 with nothing installed on to it at the moment.BY THE WAY I'M A COMPLETE NEWBIE TO LINUX.
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Dec 15, 2010
I used Several Distos, went to school up to Linux 225, but haven't used Linux for years. I have an older (P4, Win xp) laptop I use at the coffee shop. I want to put Linux Mint on it. I use a USB Adapter (Arilink101 AWLL6075) for Wi-Fi. I tried the live CD and, of course, USB Adapter doesn't work. In the half hour I looked at it, I realized I forgot a lot of things. I could not even find the laptop USB. Will tring to get it to work be the typical Linux thing, where you download the drivers, do the install right, and it doesn't work? You compile drivers, set everything up right, and it doesn't work?
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Dec 23, 2010
I have 3 network adapters on my Linux Machine. All I want is whenever I ping I want to use 1st Adapter card.In the same way, the next time if i want to use the 2nd Adapter for my other application, I should use the 2nd only. How gonna it be possible?
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May 29, 2011
I cannot configure my network adapter in backtrack. I just downloaded backtrack 4 and the network adapter a Realtek PCIe FE family controller seem not to be working.
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May 8, 2011
I have 3 network interfaces on my Linux Router :
Interface - Gateway - Type
Code:
br0 - 192.168.0.1 - Internet
eth2 - 192.168.1.1 - LAN
tun0 - 10.0.0.2 - VPN (via br0)
What I'd like to do is to route all TCP packets coming from eth2 to tun0 where a VPN client is running on 10.0.0.2. If I delete all default routes and if I add a new route to tun0 like :
Code:
route del default
route add default gw 10.0.0.2
Everything is fine, and everyone on eth2 can reach the Internet using the VPN access. Now the problem is that my VPN client does not allow any other protocols other than TCP. And I also want to allow VPN access only to eth2, no other LAN nor the router itself. use iptables to filter any TCP packets and mark them, so they can be sent to tun0, while any other packets can reach the Internet via br0 (192.168.0.1). I found on the Internet that we can mark packets before they get routed. Using the following commands :
Code:
iptables -t mangle -A PREROUTING -j MARK --set-mark 85 -i eth2 -p tcp --dport 80
ip route add table 300 default via 10.0.0.2 dev tun0
ip rule add fwmark 0x55 table 300
First of all, --dport 80 never work... :/ I wanted to filter TCP 80 packets coming from eth2, but none of them seems to be HTTP packets... oO (very strange...). Nevermind, I decided to forget about the --dport option. I use the "iptables -L -v -t mangle" command to see how many packets are marked, and it is working fine, all TCP packets coming from eth2 are marked. Now the problem is that none of them are routed to tun0 they are all respecting the "route -n" rules... and not the "table 300" rule I have created.
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Apr 7, 2009
Using Fedora 10, can anyone tell me how to setup the network scripts to create two network interfaces for vlan x and y. Both interfaces should obtain an ip from dhcp and both interfaces should run over eth0.
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Dec 31, 2009
I have four PCs in my house that are running opensuse 11.2 and I want to create a home network to share files, scanner and printer.
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Feb 26, 2010
I have openSUSE 11.2 installed and i need to create a gateway server that allows virtual private network connections. I want to play with my friends some lan games, but we are in different networks, so i want to create this gateway server so we can connect with VPN clients to this server and play freely.
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