CentOS 5 Networking :: Errors On Network Interface

Sep 9, 2009

How to figure out why there are errors on bond0(eth0)

Transfer speed is in KB

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CentOS 5 Networking :: Can't See The Physical Network Interface With Ifconfig - A?

Jun 3, 2010

Centos el5xen x86_64 in a company network, novell-netware, Static IP I have several issues with the Xen network configuration. This configuration worked before, and was maded by a other personn with a higher level in centos and network . I'm trying to re-install xen in bridging mode.

1) The dom0 ping in the company network, but can't acess to the Internet.

I de-activated firewall, iptables and SE-Linux for the test.

the ifconfig-a command return
eth0
lo
sit0 (IPV6 encapsuled in IPV4)
vif0
vnet0
but no Peth0 Physical device

Is it normal and how can i repare this ?

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Networking :: Prevent Auto Up An Interface At /etc/network/interface File ?

Jul 18, 2011

I have a ppp0 entry with post-up options like this

mapping ppp0
map none photon-plus motorola
map timeout: 12

[code]...

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Ubuntu Networking :: Configuring The Network Interface Via Dhcp - Network Messages - Code: 00 55 89 E5 0f 1f 44 00 00 Fa 5d C3 90 8d 74 26

Apr 7, 2011

I am totally new to Linux and have just installed ubuntu 10.10. After configuring the network interface via dhcp I started getting these messages that come in so frequently I can't configure anything else.

[87.186415] Stack:

Why I am getting this messages and more importantly how do I get rid of them.

The installation is on a VM on Hyper-V.

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Networking :: Configure A Network Route To A Host For Testing Network Interface?

Aug 30, 2010

today I tried to configure a network route to a host for testing my network interface. Code: route add 192.168.1.15 eth0 As I have to eth interfaces and both interface got their IP from DHCP (192.168.1.11 and 192.168.1.12) and are in the same subnet, I shut the other interface down:

Code: ifconfig eth1 down Then I tried to test the interface by doing a ping to 192.168.1.15.
Problem: When I unplug the cable from eth0 (and eth1 is still plugged) the ping still works. Somehow my linux (it's debian) powers up again eth0 and pings over this port.

How can I stop my linux doing this. I just want to have the route added only on the one interface - not the other. Is it maybe some case of a default-gateway?

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CentOS 5 Networking :: Bridging Interface Using A Customized CentOS Distro?

Jan 18, 2011

ok I am using a customized CentOS distro that is looking for 3 network cards on boot. eth0, eth1, eth2. I do not need eth0 and need to bridge it to eth1.

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Networking :: Can't Access Second Network Interface?

Mar 29, 2011

I'm having all sorts of problems connecting an access point to my computer, but here is one piece that I hope will get me going, if I can get it solved.My computer has two network interfaces, eth0 and eth1. eth1 connects to the cable modem and thence the world, and works fine. eth0 is supposed to connect to the access point over a private network. Here is the output from route with my IP address blotted out:

Code:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface

[code]...

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Networking :: Multicast With More Than One Network Interface?

Jul 30, 2010

If I have set up 2 network interfaces on a box, if I started sending multicast traffic, it will go out through both interfaces? Or is there a way to control through which interface it will go out?

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Networking :: Second Network Interface Doesn't Work?

Jul 3, 2010

I have two simultaneous active mobile connections through my two mobile phones and USB data cables. Yet I can only send/receive with one connection.Each of the phone modems have a node in /dev, namely ttyACM0 and ttyACM0. So the modems are detected correctly.After setting up two dial-up connections with the two modems I have two ip's. Ifconfig-a confirms this:

ppp0 Link encap:Point-to-Point Protocol
inet addr:10.10.219.60 P-t-P:10.6.6.6 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1

[code]....

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Networking :: Accessing Low Level Network Interface

Jul 7, 2010

I would like be able to access packets coming off the network with the hopes of coding a primitive packet sniffer for learning purposes. I would also like to be able to piece together my own packets and send them out on my network. Eventually, I would also like to write a simple firewall so I want the capability to drop packets as well as let them pass. I assume I will have to access the kernel with some system calls to do this, any one have any information or resources that could help me on this project?

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Networking :: CentOS 5.5 And Virtual Interface Configuration

Jun 17, 2011

I have a webserver with 3 virtual interfaces named eth0:1 eth0:3 and eth0:3. Until yesterday all the virtual ip's worked but eth0:1 decided that it just won't work anymore since yesterday. The configs are:

eth0
Code:
DEVICE=eth0
USERCTL=no
ONBOOT=yes
BOOTPROTO=none
BROADCAST=xx.xxx.26.190
NETWORK=xx.xxx.26.160
NETMASK=255.255.255.224
IPADDR=xx.xxx.26.174
GATEWAY=xx.xxx.26.161

eth0:1
Code:
MTU=""
NETMASK=255.255.255.224
ONPARENT=yes
BROADCAST=xx.xxx.26.191
BOOTPROTO=none
NAME=""
IPADDR=xx.xxx.26.175
NETWORK=xx.xxx.26.160
ONBOOT=yes
DEVICE=eth0:1

eth0:3
Code:
MTU=""
NETMASK=255.255.255.224
ONPARENT=yes
BROADCAST=xx.xxx.26.191
BOOTPROTO=none
NAME=""
IPADDR=xx.xxx.26.182
NETWORK=xx.xxx.26.160
ONBOOT=yes
DEVICE=eth0:3

eth0:4
Code:
MTU=""
NETMASK=255.255.255.224
ONPARENT=yes
BROADCAST=xx.xxx.26.191
BOOTPROTO=none
NAME=""
IPADDR=xx.xxx.26.187
NETWORK=xx.xxx.26.160
ONBOOT=yes
DEVICE=eth0:4

route-eth0
Code:
ADDRESS0=0.0.0.0
NETMASK0=0.0.0.0
GATEWAY0=xx.xxx.26.161
eth0:3 and eth0:4 still work, but 2 doesn't

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CentOS 5 Networking :: Route Add With Specific Interface?

Apr 19, 2009

I have an Asterisk-server with 2 interfaces, a WAN-interface (eth1) and a LAN-interface (eth0).

SETUP :

IAX-provider(internet) --> firewall --> Asterisk-server --> switch --> clients_on_LAN

So everything coming from the IAX-provider on port 4569 is forwarded to the Asterisk-server's WAN-interface (eth1).
This needs then be routed to an internal SIP-phone (an IVR-system will define which one) via eth0.

When a call is initiated from an internal SIP-phone (they register to the IP-address assigned to eth0) it needs to be routed via eth1 to the gateway (192.168.4.250). Asterisk will setup an IAX-channel on WAN-interface (eth1) to the IAX-provider (via gateway).

So... will this work :

route add -net ip_IAXprovider netmask 255.255.255.0 gw 192.168.4.250 dev eth1

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Fedora Networking :: Network Interface Will Not Start On Boot?

Sep 6, 2009

I'm a newbie on Linux and trying to find my feet so please be kind.I have installed vmware on my XP laptop and have installed fedora core 9. Network setting on the VMware is set to bridged. My interface eth0 which is using the wireless does not start on boot. I have to run ifup ifcfg-eth0.The file ifcfg-eth0 had onboot=yes and NM=no, so i changed it so that the NM=yes.However this does not resolve the problem at all. I have put the file back to its original configuration and I have disabled network manager and have had no luck

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Ubuntu Networking :: /etc/network/interface Address Not Recognized

Jun 18, 2010

Showing my ignorance, but why would this work

address 172.16.1.8
netmask 255.255.254.0
network 172.16.1.0
broadcast 172.16.2.255

[Code]....

Notice the 2 in address. Seems to me it doesn't like the network and wants it to be 172.16.0.0, but I am adding to a network already configured this way.

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Ubuntu Networking :: Network Interface Numbering Messed Up?

Oct 6, 2010

I am trying to get my ethernet adapter list to make some sense. This is what ifconfig spits out

Code:
agarzon@euler:~$ ifconfig
eth3 Link encap:Ethernet HWaddr b8:ac:6f:3b:f4:4f

[code]....

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Ubuntu Networking :: Bind Program To Network Interface?

Jun 17, 2011

Is there any way in a machine with 2 (or more) network devices to only allow 1 program to use interface1 and force all other programs to use the other?

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Networking :: Configure The Network Interface Under The Owner (not ROOT)?

Apr 20, 2011

i have ubuntu 10.10 and i want to configure my interface eth0 with the commande line with owner (not the Root)$ifconfig : this commande works and listed all interface with some description -> thats goodbut when i use some parametre like @ip and netmask

$ifconfig eth0 10.10.10.1 netmask 255.255.255.0
SIOCSIFADDR: Permission denied
SIOCSIFFLAGS: Permission denied

[code]...

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Networking :: Network Interface Not Coming Up Automatically At Boot?

Feb 10, 2010

I installed Fedora 12 on an Eee PC 1001HA. This laptop has a Ralink RT3070 wireless chipset, for which the driver is not yet in the kernel (still in staging I believe). However I downloaded the driver, compiled it, and installed it. AFAICT, it works fine.

One small obstacle remains: I am uable to get the network interface to come up automatically; I have to run # ifconfig ra0 up. Because of this NetworkManager never sees the wireless interface, making connecting to WAPs a chore.

I created a ifconf-ra0 file in /etc/sysconfig/network-scripts, and it includes the line ONBOOT=yes, but this doesn't do the trick.

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CentOS 5 Networking :: Dhclient Can't Get Default Gw On VLAN Interface

Jan 13, 2011

I have the following system

# cat /etc/redhat-release
CentOS release 5.5 (Final)
# uname -r
2.6.18-194.32.1.el5

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CentOS 5 Networking :: Shutting Down Interface On Link Down State?

May 17, 2011

I have a problem. I want interface to shut down once there is a link down state detected. If you set up eth0, and then plug cable out, eth0 stays up, just loosing the RUNNING flag. I want it to go down completely.

I've stumbled upon netplugd, and I've tried using it. It is a daemon that detects states in (link up) and out (link down) from kernel netlink interface. If I have this daemon up, it detects that link is down (eg. cable removed from interface), and it runs correctly /etc/netplug.d/netplug eth0 out. That script then runs ifdown eth0. And that's ok.

But very next moment netplugd runs /etc/netplug.d/netplug eth0 probe, and probe section of that script runs "ip link set eth0 up", which then turns interface back on!I've tried commenting out that line, but then new problem occurs - after the link is up, netplug cannot figure that out and bring back interface. Has anyone have this kind of problem, and any viable solution with netplug?

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CentOS 5 Networking :: Redirect All The Traffic To An Ethernet Interface

Sep 12, 2011

Currently I have a server which runs under centOS 5.6. It is dedicated to the VoIP application of my customer.I have a problem for which I have the solution but I didn't managed to achieve it.So, let me explain you the context.Here is the networking aspects of my environment

VoIP Provider_____Gateway_____________My server
ADSL Provider____(non pingable)
x.x.x.2 <====> A.A.A.1 <======> A.A.A.3

[code]....

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Fedora Networking :: Recover Eeprom Network Interface MAC Address?

Mar 9, 2009

Someone just erased my HWADDR line from /etc/sysconfig/network-scripts/ifcfg-eth0. How can I obtain my original MAC address?

Code:

ifconfig eth0 does not work (it shows the wrong MAC address) since the HWADDR line from the file I mentioned above was erased. Also there is no ifcfg-eth0.bak backup configuration file.

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Fedora Networking :: Chrony Seems Very Poor At Finding A New Network Interface

Mar 21, 2011

I use chrony on my laptop thinking it would be better for it than ntp because I'm frequently connecting and disconnecting from wireless cafe access points and going in and out of suspend mode. But I've also noticed that if chrony is started before the access point is connected it never syncs to the time servers. I have to manually restart it via the service command after I connect. This doesn't seem right to me, if chrony fails to find a network at start time, doesn't it periodically try again ?

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Ubuntu Networking :: /etc/network/interfaces Not Accepting More Than One Config Per Interface

Feb 3, 2010

My old /etc/network/interfaces isn't working in 9.10. I've used it from 8.04 to 9.04 without issues.

I need to make multiple configuration per interface:

Code:
auto lo
iface lo inet loopback
auto lo:1

[Code].....

If not how can I downgrade the program responsible for reading this file?

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Ubuntu Networking :: Activate Wireless Network Interface In Terminal?

Feb 26, 2010

running 9.10 server, have SSH access through LAN, but I'd like to move box out of my neighbor's (shared internet & the router's in his place) and into my own space. Would have done so already, but I can't get the wireless working. Details below:lshw -C network gives:

Code:
*-network:0 DISABLED
description: Wireless interface

[code]....

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Ubuntu Networking :: Forcing An Application To Use Specific Network Interface

Apr 19, 2010

How can I force a Wine application (or Wine itself) to use a specific network interface? I have installed hamachi and am trying to play starcraft over virtual LAN. However, when I run Starcraft with hamachi running, it does not work. I have now determined that hamachi creates a network interface called "ham0". How do I force Wine/Starcraft to use the "ham0" network connection? I have looked into forcebindip but it crashes on wine.

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Ubuntu Networking :: Unable To Get Share Connection To My Other Network Interface?

Aug 19, 2010

I am a big ubuntu fan (9.04) installed,everything went well, installed my network card(s) & the onboard without no problems/installation disc.I have 2 Network interface(s) that I used on windows xP to 'bridge' my connection, because I only have one slot on my router, and the last slot runs into my computer room and from the PC, I run it to the xbox/ps3.No matter what I do, I cannot get ubuntu to share connection
to my other network interface.

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Ubuntu Networking :: Hostname Not Announced With Static Network Interface

Sep 17, 2010

My /etc/hostname is not announced on the local network (not showing up on my Mac nor router) when setting /etc/network/interfaces to:

Code:

iface eth0 inet static
address10.0.0.10
netmask255.255.255.0
gateway10.0.0.1

I have tried bringing the interface up and down, and have also rebooted. If I change it to DHCP it will display, but this does not really help me.

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Ubuntu Networking :: Forcing An Application To Use Specific Network Interface?

Apr 8, 2011

How can I force a Wine application (or Wine itself) to use a specific network interface? I have installed hamachi and am trying to play starcraft over virtual LAN. However, when I run Starcraft with hamachi running, it does not work. I have now determined that hamachi creates a network interface called "ham0". How do I force Wine/Starcraft to use the "ham0" network connection?I have looked into forcebindip but it crashes on wine .

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Ubuntu Networking :: Network Tools Defaults To Loopback Interface

Jul 22, 2011

I'm running Ubuntu 11.04 and I've been unable to access any type of Internet service besides web browsing. When I check on Network Tools, it's always set on Loopback Interface, regardless of whether I've just switched it to Ethernet Interface. I haven't been able to download system updates through Update Manager. I'm not very experienced with Ubuntu.

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