Debian :: Identify The Network Eth0 - Eth1 - Eth2 Interfaces?

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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Debian Hardware :: Change The Eth2 To Eth1?

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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Networking :: Pinging Multiple Interfaces - Getting Pings From Eth0 But Not From Eth1?

Feb 26, 2011

I have two network interfaces and their entries are shown as eth0 and eth1... I want to assign them static IPs which I do by

ifconfig eth0 192.168.9.245 netmask 255.255.0.0 up
ifconfig eth1 192.168.8.245 netmask 255.255.0.0 up

But I am not sure if it will ping both the interfaces if I issue a command

ping -I eth0 192.168.9.113 (machine in network)
ping -I eth1 192.168.9.113 (machine in network)

I am getting pings from eth0 but not from eth1

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Networking :: IPtables Port Forwarding \ Have A Computer With Two Interfaces Eth0(LAN) And Eth1(WAN)?

Apr 20, 2011

I have a computer with two interfaces eth0(LAN) and eth1(WAN).I have followed some guides on the internet and came up with this iptables configuration:

# Generated by iptables-save v1.4.4 on Wed Apr 20 09:43:12 2011
*nat
:OUTPUT ACCEPT [0:0]

[code].....

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Networking :: Sending Video Streams From Eth0 And Eth1 To The Other Server Programs' Eth0 And Eth1?

Jul 30, 2010

I 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]....

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Red Hat / Fedora :: Unable To Bond Eth1 And Eth2 Together As Bond0

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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Networking :: Kernel - Forward Packets From Eth0 To Eth1 And Eth1-to Eth0 As Well As Get A Copy Of These Packets For Analysis

Sep 27, 2010

I have a hardware device with two ethernet ports, eth0 and eth1 running Centos 5. Basically my goal is to forward packets from eth0->eth1 and eth1->eth0 as well as get a copy of these packets for analysis. If I set IP routing to do the forwarding then I won't get a copy of the packets for analysis.

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General :: Eth0 Or Eth1 - When There Is Only One Network Card

Nov 30, 2010

I've noticed that when Linux boots on different machines or with different versions, the network card is assigned to eth0 or to eth1, when there is only one network card. What is the difference and is there any way to tell which one it will be for any machine or version?

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Fedora :: Change The Network Default Eth0/eth1 In F12?

Dec 4, 2010

I'm using F12 on an old box which I have fitted with a new networkcard. I'm using the box as a music server (Twonkey) and want to use the new card (gigabit - eth1) as the default, but seem unable to. I can't switch of the mainboard ethernet option (eth0) in the bios and have tried to change the settings in the ifconfig-eth0 and -eth1 files by changing the hardware addresses as elsewhere recommended, but that doesn't work. During start-up it then gives me an error message that the MAC number was not the expected one. This would indicate that the network options are kept/read elsewhere. I'm not very familiar with Linux/F12. how to make the card the default option instead of the mainboard option.

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CentOS 5 Networking :: Eth0, Eth1, Eth1:0, Route = Get One Gateway For All The Eth?

Mar 4, 2011

I need to setup two ethernets in my Centos box. OK no problem both ethernet and 1 virtual works perfect. eth0, eth1 and eth1:0. I'm trying to set up diferent routes for eth0 and eth1/eth1:0 I need eth0 has a 192.168.1.1 gateway and eth1/eth1:0 192.168.1.100 gateway.I think I've tried almost every thing but always get one gateway for all the eth.These are my config..

/sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:XX:XX:XX:XX:XX
inet addr:192.168.1.168 Bcast:192.168.1.255 Mask:255.255.255.0[code]......

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Ubuntu Networking :: Why Etc/network/interfaces Does Not Contain Eth0

Jan 1, 2011

So far as my knowledge goes, /etc/network/interfaces is supposed to contain a list of all the available interfaces. But my /etc/network/interfaces looks like this,auto loiface lo inet loopbackBut I have a perfectly working eth0 connection. Why does not it appear here?

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Debian :: Eth0 And Eth1 Conflict ?

May 4, 2010

I have a server with two gig-e ports, eth0 and eth1. When eth0 the only port that is connected to a network it will get online ok. It is the port used to connect to the internet. eth1 is used for PXE / TFTP / DHCP server for a private network. eth1 will serve ip's ok. The issue is when both are connected at the same time. eth0 to our LAN, and eth1 to the private network; eth0 does not ping or load pages in firefox. eth1 will still serve ips'. Is there any reason why eth0 would stop working if eth1 is connected to a switch? eth0 ip is 192.168.10.110, eth1 ip is 192.168.1.1 different subnets.

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OpenSUSE Network :: Eth1 Stops Accepting Connections Whenever There Is No SSH Connection Present On Eth0

Oct 2, 2010

I recently setup a new SUSE box for the purposes of acting as an ftp/sftp server. It's currently setup to run ProFTPD 1.3.3.rc3 and mod_sftp/0.9.7. The server has two internal network interfaces eth0 and eth1. eth0 is purely for internal use to accept ftp and ssh. eth1 is outward facing and receives connections from the WAN via SFTP over port 22. The problem I am facing is that after half hour to an hour eth1 stops accepting connections whenever there is no SSH connection present on eth0. I can't figure out why this is happening.

ProFTPD is setup as follows: SocketBindTight directive is on, default server and port are commented out.

[code]...

When the external interface is unreachable the proftpd and proftpd-sftp logs show no record of any connection attempt. I have noticed however if I leave eth0 down eth1 stays contactable without problem. Can anyone give me some pointers on what I can check to find out why this may be happening.

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Debian Configuration :: Redirect Trafic From Eth0 To Eth1

May 26, 2011

I have twe network cards eth0 and eth1. eth0 is connected to internet and eth1 is unusable. So, i'd like to redirect trafic from eth0 to eth1. how can i do it?

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Debian Configuration :: Using WiFi Router On Eth1 Bridged To Eth0

Dec 13, 2015

I am running : Linux ics385 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt11-1+deb8u6 (2015-11-09) x86_64 GNU/Linux

Here's the situation

1. I'm trying to configure a WLAN using a D-Link DLR655 wifi router that is connected to eth1.

2. eth0 is connected to the ISP's DHCP router and has the IP 192.168.0.24

3. I've bridged eth0 to eth1 such that eth1 has the static IP 192.168.8.1

4. I've manually configured the router and it uses the 192.168.8.1 as the WAN address with its subnet on the 192.168.10.* address space.

5. I can connect a laptop to the D-Link using wifi and ping 192.168.8.1 but I can't ssh to it or to anything beyond it from the laptop.

6. If I'm on the server (192.168.0.24) I can ssh into either 192.168.0.24 or 192.168.8.1 but not if I'm on the laptop. I conclude from this that ssh is not the problem but the laptop says ssh: connect to 192.168.8.1 port 22: connection refused.

So, am I conceptually confused or is it that I have to open ssh up to the other sub-net address spaces or something like that?

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Networking :: Eth0 Fixed IP - Eth1 DHCP Gateway - Access To Eth0?

Aug 19, 2009

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?

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Networking :: Production Server With Static IPs On Eth0 And Eth0:1 - Getting Private LAN On Eth1?

Jul 1, 2010

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).

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Ubuntu Networking :: Messed Up /etc/network/interfaces - Original Auto Eth0 Setup Is Missing

May 24, 2010

I'm trying to setup my interfaces along side GNS3 for study purposes, and came across a ..... vid saying to try this (my current config)

[Code]....

I'm praying for some crappy syntax error, also in Network Connections... its now blank, the original auto eth0 setup is missing

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Red Hat :: Change Eth1 To Eth0 ?

Jun 22, 2010

I'd like to ask you all for a simple thing on Slackware that I dont know how to do under RHEL 5.4.

Under Slackware 12.2 it is easy to change eth0 to eth1.

This should be done in file: /etc/udev/rules.d/75-network-devices.rules:

Code:

Code:

Well, under Red Hat it looks slight diffrent. It looks like RHEL does not use udev ( correct me if i am wrong but there is no simillar file in /etc/udev/rules.d and cant see any script in /etc/init.d/).

I have found that all NIC configuration is stored in /etc/sysconfig/netwotk-scripts/ifcfg-ethx.

On this file it is possible to place varible: HARDWARE=

However after reboot it doesnt work. So, my question is - how to assign eth[number] to specified MAC-addr ?

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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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General :: Which Card Is Eth0 And Which Is Eth1

Nov 2, 2010

I have a Linux machine with two Ethernet cards both using the Intel e1000 driver. lspci reports different models of Ethernet cards, but I can't tell which is eth0 and which is eth1. Other than turning off the machine and reading the chips, how can I tell which model is eth0 and which is eth1?

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Cant Connect To Both The Eth0 And Eth1 At The Same Time

Dec 11, 2010

I have 2 LAN ports. one from the motherboard (on board) and the other from a lan card i bought a few days back. one is use for browsing the net, the other for a media player. problem is i cant connect to both the eth0 and eth1 at the same time. i have to disconnect one of them to connect to the other. and this really gets irritating as it doesnt always work as flawlessly as it should. what am i doing wrong?

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Networking :: Eth0 Or Eth1 - What Is The Difference

Nov 30, 2010

I've noticed that when Linux boots on different machines or with different versions, the network card is assigned to eth0 or to eth1, when there is only one network card. What is the difference and is there any way to tell which one it will be for any machine or version?

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Networking :: Switch Eth1 To Eth0 ?

May 4, 2011

I installed Slackware 13.37 console only.

I have two ethernet cards.

I want to change eth1 to eth0 and eth0 to eth1, because I have some old firewall script and I need eth0 be eth1, because of routing internet. My ISP close my net connection on MAC adress.

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General :: How To Forward Eth1 To Eth0

Feb 1, 2010

We are currently having a windows virus outbreak in our corporate network, all the it guys using windows machines and they are infected of course.

My question is I have a internet enabled ubuntu 9.10 machine with two nics.

eth0 is for internet and I wanna distribute my internet connection from my other nic.

There are alotta switches and access points in our network but i placed my ubuntu desktop just like the infected windows machine. Everything seems working except other clients internet connections.

How to share internet connection on eth0 to eth1

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Debian Configuration :: Cannot Browse Web When Network Eth1 Is Enabled?

Mar 30, 2010

Like the forum for #1I'm using debian 5.0 with a modem to connect to the internetand eth1 to network my home computers. When I try to browse the internet with Konqueror, I have to disable eth1 then wvdial just to browse the internet. How do I fix this?Note: My resolv.conf has my primary DNS address in it, for my ISP (nameserver 67.211.172.29) and so on.

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Fedora Servers :: HTTPD Dual Nic Using Eth1 Instead Of Eth0

Mar 2, 2009

I've just setup Fedora 10 x64 on a Supermicro 7045 with dual nic; I setup a web site and ran into a strange problem; I can't see my website from outside my LAN; checking IP on Internet it sees my IP as coming for my dynamic IP (IP of router/switch) and not my static IP.

eth0: Static IP
eth1: Dynamic IP

These are standard Intel 82563EB Dual-Port Gigabit Ethernet Controller.

Is there a way to specify the order in which it sees the nic ports?

I'm wonder if I can mix Static and Dynamic IP's; on the outside they resolve to a static IP; the dynamic one shows up as my router/switch IP; but it allows me to access my DHCP computers; this isn't a web server; but a development machine for writing PHP apps.

Where 123.123.123.3 is my static IP address.

I should mention that nmap -v -p 80 123.123.123.3 shows an open port on 80

My VirtualHost is setup like:

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Fedora Networking :: Change Eth1 Into Eth0 And Viceversa?

Apr 3, 2009

I have two network devices :

1. Intel Corporation 82574L Gigabit Network Conncection (Currently eth0, Mac=00:0e:8c:ab:c6:b1)

2. National Semiconductor Corporation DP83815 (Currently eth1, Mac=00:0e:8c:8a:70:62)

I want to change them so that the "Intel" become eth1 device and the "National" become the eth0 device.

I already tried these steps :

1. I disabled the Network Manager and enabled network

2. Edit the /etc/udev/rules.d/70-persistent-net.rules like this

Quote:

3. Change the /etc/sysconfig/network-scripts/ifcfg-eth0 and /etc/sysconfig/network-scripts/ifcfg-eth1 MAC addresses.

4. Reboot

5. After it bootup the Fedora can't recognize the devices, if I do ifconfig -a it shows "eth0_rename with FF:FF:FF:FF:FF:FF mac address".

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Fedora Networking :: Why Primary Interface Is Eth1 Instead Of Eth0?

Jan 31, 2010

I have two network interfaces on my computer but only one of them is connected to an Ethernet cable. Until now on every Fedora release, the activated primary interface has been named as eth0 and everything has always worked well without any problem. Recently I switched to Fedora Core 12 and surprisingly I observed that for the first time, my primary interface has been considered by the system to be eth1 instead of eth0. I tried to replace the content of ifcfg-eth0 by ifcfg-eth1, yet system gave me an error that there was MAC address mismatching. I conserved their MAC addresses in their files and just replaced other connection parameters ( such as IP ADDR, NETWORK, NETMASK, etc.) but it did't work. When I do "server network restart", the command blocks.

As I try to install oracle on this system, regarding the fact that oracle requires static network configuration on the primary network interface, I don't know how to proceed in order to set eth0 as my primary interface (or rather set the current eth1 to eth0 because it is actually eth1 that refers to my activated primary network card).Just one more time, I would like to remark, that with previous versions of the Fedora Core, on the same computer (with the very same two network cards) I never had problem and I had installed oracle on the system with success, having the statically configured eth0 correctly detected by the system.

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OpenSUSE Install :: Using Old Devices Names Eth0, Eth1?

May 6, 2011

I want to use old devices names eth0, eth1 etc. instead of default OpenSuSE (11.1)eth_s0_0 etc. There is no firewall, no devices management via NetworkManager, static IP address.

1) to edit /etc/udev/rules.d/70-persistent-net.rules and insert eth0&eth1 instead of eth_s0_0 & eth_s0_1

2) To rename /etc/sysconfig/network/ifcfg_eth_s0_0 ( and s0_1) to ifcfg_eth0 and ifcfg_eth1 and then reboot ?

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