I want to set up an ethernet interface using C language in Linux. Currently it is being done by :
system("/sbin/ifconfig eth1 192.168.0.29 up");
But I dont want to use the system call. Kindly suggest me any other way to do it..
My laptop was working fine on wireless till the userinterface changed and it defaulted to ethernet and now it won't let me go back on wireless How do i disable ethernet?
View 4 Replies View RelatedI've a server with two NIC. Sometimes the server becomes unreacheable. When this happens, I did a reboot and then it works.. but when looking at the interface status (with ifconfig command), I've notice several "errors".So, I've tried to change NIC.. but the problem occurs again.I've also changed the port on the switch.
View 5 Replies View RelatedI'm just installed Fedora 14 64-bits into a server which come with Multiple network interfaces, I'm found that the naming of each network interface is not in sequences in what I'm thought (e.g: the on board network interfaces name as Eth5 and Eth6, the additional card ethernet port name from Eth0 - Eth1 and etc). How to name the interfaces as what I wish to? What should I install to allow me to rename the interfaces.
View 2 Replies View RelatedI tried to setup a connection as below but face some problem (probably route table setting incorrect). Hope if anyone could shed the light.Basically, I have a PC1 (.1) and PC2 (.130) connected via a PC router. PC router has 2 interfaces: wireless (.2) and ethernet (.129). PC1 connects to PC router via LAN cable/wireless interface, while PC2 connects to PC router via cable. This settings try to simulate 1 wireless connection along the path (and because PC2 is too old to support wireless interface, we need a PC router). These interfaces are all under same 172.16.130.x subnet.
View 3 Replies View RelatedI'm trying to create EoIP interface on ubuntu so i can create a simple tunnel to my mikrotik router. Is there anyone know how or even done that? If EoIP is not possible, is there any other simple way?
I had already read and thought about doing it with OpenVPN, but when I read the community documentation for OpenVPN on ubuntu 10.10, I fear it won't connect the tunnel to mikrotik OpenVPN server, since OpenVPN on ubuntu uses 2 certificate and 2 key files(as i read on the docs), but mikrotik configuration, i can see only 1 certificate can be applied on. This confuses me and make me decide to use EoIP(but i can't find any tutorial/docs about it). I don't actually need the encryption and security, i just need to create a tunnel for ubuntu and mikrotik.
I'm running Ubuntu 11.04 on my desktop and the 70-persistent-net.rules file seems to be ignored. The ethernet interfaces are randomly shuffled around on boot (i have 4 interfaces). The original one was configured to have a static IP address (eth0). Is there anything that prevents the /etc/udev/rules.d/70-persistent-net.rules from being applied/used?
View 1 Replies View Relatedgetting a VLAN router with a wan interface capable of Ethernet and AMT? something under $80-$100 pref.i need to segment a client on my home network.
View 1 Replies View RelatedI have installed Fedora 14 about 4 days ago. I have set all the networking parameters like dns path, hostname etc. I have also ensured that I select the check-box for "Enable automatically when system starts" for eth0 interface. But weirdly, whenever I boot my system(or restart), I see that the interface eth0 is disabled. I have to manually enter as root and enable it, each time I boot/reboot my system. Why is this happening? Could you please suggest a way so that I have eth0 interface enabled always when I boot up?Also, my domainname also is not boot-persistent. What steps should I take to ensure that the domainname set once persists across reboots?
View 12 Replies View RelatedCurrently 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]....
On FC10, when system boots up, it would auto detect (from DHCP) and configure eth0.
This does not happen on FC11, but I can manually configure the interface. The entries in /etc/sysconfig/network-scripts/ifcfg-eth0 are identical on both OS releases.
Don't know if this is related, but when I run System->Administration->Bootloader, it fails system-config-boot - missing module kudzu.
I have tried the command on ubantu workstation but it giving error : # mii-tools SIOCGMIIPHY on 'eth1' failed: operationsnot support. no MII interface found.
Internet not working. tell me anonymous of kudzu command in fedora.
So I keep reading that bonding ethernet devices is supposed to be easy. I have followed several tutorials and tried a few things on my own, and I can't seem to get it right. I currently have a setup that allows me to ping internally on my network, but when I try to ping externally I get the error:
connect: Network is unreachable
Before I bonded the interface my connection worked fine. Here are my config files. I am running centos 5.3 on a virtual machine.
/etc/sysconfig/network-scripts/ifcfg-bond0
Code:
DEVICE=bond0
BOOTPROTO=none
ONBOOT=yes
NETWORK=192.168.1.0
NETMASK=255.255.255.0
IPADDR=192.168.1.211
USERCTL=no
/etc/sysconfig/network-scripts/ifcfg-eth1
Code:
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth1
BOOTPROTO=none
ONBOOT=yes
HWADDR=00:0c:29:88:59:47
MASTER=bond0
SLAVE=yes
USERCTL=no
/etc/sysconfig/network-scripts/ifcfg-eth0
Code:
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
MASTER=bond0
SLAVE=yes
BOOTPROTO=none
HWADDR=00:0c:29:88:59:3d
ONBOOT=yes
/etc/modprobe.conf
Code:
alias eth0 pcnet32
alias scsi_hostadapter mptbase
alias scsi_hostadapter1 mptspi
alias scsi_hostadapter2 ata_piix
alias eth1 pcnet32
alias bond0 bonding
options bond0 mode=0 miimon=100
output of cat /proc/
Code:
Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: eth0
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:0c:29:88:59:3d
Slave Interface: eth1
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:0c:29:88:59:47
I am using RHEL6 on a server with 3 interfaces.
eth0 is connecting via a Cisco switch to the outer world and eth1 and eth2 to internal networks.
eth1 and eth2 are working without problems all the time, however I have the following incident with eth0: although it is RUNNING, and after it works for some time (like some hours), it then becomes incapable of sending/receiving traffic. Here are more details, after the interface exits the RUNNING state:
[root@mgt ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr E4:1F:13:6C:87:74
inet addr:9.162.91.26 Bcast:9.162.91.255 Mask:255.255.255.0
inet6 addr: fe80::e61f:13ff:fe6c:8774/64 Scope:Link
UP BROADCAST MULTICAST MTU:1500 Metric:1
[Code]....
I am wondering whether there this is because there is not traffic for some time and so the interface goes to idle. Is there any parameter I can tweak in RHEL6 to force the interface to remain RUNNING even in the absence of traffic (although I would be expecting that some 802.1 packets would be periodically flowing from the switch to the interface)?
Im new to this Cent OS as well as Unix based Operating Systems. Please help me with the below requirement.My Company is a Serach based data collector from different websites like Google, Yahoo & many more..Collecting the data from the search engines is a issue for right now.. As many search engines are blocking us to search and retrive the date after some time.. Taking Google as example : Google Blocks my IP after every 30 mins of retriving.. Application is a Windows based & using Windows 2003 as the Server.. Would like to give a Dynamic IP to the Windows Server via 1st Ethernet Card & enable the 2nd Ethernet for the Internet..Eg : eth 0 = 192.168.1.1eth 1 = x.x.x.x (Public IP)I have check with few of my friends who told me to get Linux or Cent OS installed to do a interface disable after given time & enable a secondary device or virtual interface the next couple of seconds... Like eg : eth 1 = x.x.x.1 eth 2 = x.x.x.2 eth 3 = x.x.x.3 so on.. Would like the eth 1 to be down after 60 mins & eth 2 o be up & again after 60 mins of up time eth 2 down & eth 3 up.
View 6 Replies View RelatedI've been having issues setting up the wireless interface on my Ubuntu server (command-line only, no GUI) and I can't seem to get it working. It seems as though the card is recognized, the drivers are installed and the interface is up, but it fails to connect. I have no idea where I'm going wrong. I have WPA and a MAC filtering setup on my wireless router. An exception has been made for this PC's MAC address and I've manually entered the connection details into /etc/network/interfaces.
[Code]...
I have a reverse ethernet cable and I want to use it to connect a desktop 10.04 Lucid + laptop 10.04 Lucid
How do I do this ? I have no routers, no hubs. This is so I can transfer HD ISO backup files.
I have an old PowerBook G4 that I would like to use as a 'dummy' computer for learning wireless penetration (WEP/WPA attacks) more effectively. I had been using a wireless router, but I gave it away I can use Mac OS X to share an ethernet connection over wifi, but this is _very_ un-configurable. You get two options only, WEP and a key-length. So, I would like to install someway to make this wireless connection more configurable.
View 2 Replies View RelatedI booted an OS from live disk. The OS boots successfully but eth0 fails to start. I checked lspci , it outputs the exact ethernet card details :(Broadcom Netextreme II BCM5716 Gigabyte ethernet)
Ifconfig -a returns only loop back interface lo and sit0. The output of dmesg | grep -i 'eth' is :"Netfront : initializing network ethernet driver"
I was also able to find the kernel module bnx2.ko. I did insmod and lsmod lists it. I am not sure what exactly is the issue or how to debug this problem. Any assistance or pointer will be helpful. Thanks for your time.
What is the Linux command to clear IP address of an interface without bringing it down and/or restarting network services. Seems strange ifconfig is able to change IP address but has no option to clear it, or am I wrong?
EDIT:As simple as ifconfig eth0 0.0.0.0. They should have put it in the man
I booted an OS from a live CD. The OS boots successfully but eth0 fails to start. I checked lspci, it outputs these Ethernet card details:
(Broadcom Netextreme II BCM5716 GBabyte ethernet)
ifconfig -a returns only the loopback interfaces lo and sit0. The output of dmesg | grep -I 'eth' is:
"Netfront : initializing network ethernet driver"
When I run service network restart I get:
"Obtaining IP for lo [FAILED]
WARNING: Deprecated config gile /etc/modprobe.conf , all config files belong into /etc/modprobe.d/
Device eth0 does not seem to be present, delaying initialization [FAILED]"
The output of MII-tool -v is:
No MII interface found.
I was also able to find the kernel module bnx2.ko. I did insmod and lsmod lists it.
I recently installed Vortexbox, which includes fedora release 14.Got everything working, but could not access the network. After a bit of searching, found that "ifup eth0" activated the interface.To do this on boot, I have added this command, together with my "mount /dev/..." command in file /etc/rc.localIt works OK, but I cant help thinking there's a proper way of doing this?
View 4 Replies View RelatedI have UDP packets generated on Machine A that are addressed to Machine B (unicast) that I capture with PCAP. After transporting this raw data to Machine B (via RF modem) I'm trying to reinject the original UDP on Machine B through a tap0 interface. The capture and transport are all working fine. BUT once on the destination machine, the reinjected ethernet packets are NOT being received by a local UDP server. this is my socket creation :
Code:
outputSocket = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
struct ifreq s_ifr;
strcpy(s_ifr.ifr_name, "tap0");
"data" is an unsigned char array that contains the original packet data received from pcap, which includes the ethernet header, ip header, udp header, and payload data. after the call to write() completes, Wireshark on Machine B sees a correctly formatted (checksums and all) UDP packet when listening to tap0 - ie. no lines highlighted in red. *BUT* - a UDP server i have running on Machine B never receives the reinjected UDP datagram. (I have verified that this server works, by using a simple local udp generator app.) is there something wrong with how I'm creating the socket and/or writing the data back out to the tap0?
I've added a 2nd ethernet network card into my linux box. After I installed it the box recognized the new card and mapped it to eth1, as I expect. I then configured the addresses and routing for my eth0 and eth1 interface. Since then I had shutdown my box.When I next started my linux box up only eth0 was present.`ifconfig -a` only displays eth0, but `lspci` lists both cards. How can i permanently map the new pci card to eth1?
Code:
scattaneo@unthread:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:1a:a0:8c:61:49
inet addr:192.168.2.108 Bcast:192.168.2.255 Mask:255.255.255.0
inet6 addr: 2002:c0a8:6414:1234:21a:a0ff:fe8c:6149/64 Scope:Global
[code]....
I need to ask about Virtual Interface, as I need to use my ethernet interface to act as two ethernet ports. As I need to give eth0 an IP address and give eth0.5 another ip address, and make some natting and other issues. Can I do that with the same interface?
View 3 Replies View RelatedI want to configure multiple virtual ethernet interfaces over a single physical ethernet interface (eth0) and for each virtual interface the MAC address must be unique and the IP address must be Static.Finally all the virtual interfaces must be able to communicate both internally and externally and the traffic should be captured using wireshark.
I need to have such kind of setup to communicate devices individually using one physical ethernet device.
Because I was fiddling with few kernel modules like MACVLAN and MACVTAP and successfully enabled those modules and rebuild kernel. Using macvlan and macvtap I can configure virtual interfaces with unique mac address and static IPs but while capturing packets using wireshark interfaces behave weirdly.
For example say on HOST machine I have 1 physical interface and created 3 virtual interfaces as shown below.
Interfaces :
eth0 (physical ethernet interface)
IP: 192.168.A.A
MAC: aa:aa:aa:aa:aa:aa
[Code] ....
First from above interfaces I started pinging eth0 internally from host machine in which it worked as usually.
Second I did same externally from other machine which is connected to the same network of Host machine, and this did work as usually.
Third I pinged first virtual interface veth0 both internally and externally and this also works and after that I did check source and destination MAC address using wireshark tool-where both showed up there respective MAC address.
Now triggers the issue, where I pinged second virtual interface same like I did for first one, but this time ping was success and where as in wireshark tool the MAC address for veth0 is picked by veth1. This is where I got stuck and this issue happened for all the remaining virtual interfaces.
I couldn't see any virtual interface showing their respective MAC address, as of the remaining except the first virtual interface has been picking the first veth0 mac address.
I need to share internet connection through wired-ethernet with another computer which does not have a wifi card.
However, no eth* interface shows up on ifconfig. Even more surprinsingly, neither lshw nor lspci shows anything related to wired ethernet controller/adapter:
Code: Select alllshw -C network
*-network
description: Wireless interface
product: WiFi Link 5100
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan2
[Code[ ....
Why isn't my laptop's wired ethernet not showing? I have a Toshiba Satellite PSAG8U-04001W.
The installation of Debian wasn't originally on this system: it was on an older laptop whose motherboard fried, so I rescued the hard drive as well as the Debian installation. However, I doubt this should have anything to do with lspci not even detecting the wired eth controller.
I'm having trouble getting my Ubuntu 10.04 machine (Sony Vaio VGN-SR490) to connect to the Internet by way of an Ethernet cable connected directly to my router.
I'm able to connect to the Internet using this same cable using a Windows machine, so there's something wrong with the way Linux is configured.
How do I got about figuring out what the problem is and solving it?
Here are my network settings on Linux:
$ ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
[Code].....
It looks like the network adapters list is empty. I will now install both Windows XP and Ubuntu Linux dual-boot. I'm still not able to access the internet, even through Windows. I'm wonder if this could be a hardware problem with the computer or a problem with the router itself. Other computers can connect to this same router, and work fine. (That's how I'm posting this after all!)
I am having trouble setting up my second network interface on Ubuntu Server 10.04. When setting up the machine it did detect both cards but I only picked one to configure, and now I want to setup the second.
I went into /etc/interfaces and basically copied the settings for eth0 but changed the IP and the name to eth1. I then restarted.
Quite honestly it might be working! But when I run ifconfig -a I see no packets I see
Quote:
eth1 Link encap:Ethernet HWaddr 00:0e:0c:59:af:c4
inet addr:192.168.4.21 Bcast:192.168.4.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
[Code].....
isn't that what "UP BROADCAST...." line means?
So perhaps my question is how do I test my 2nd interface? I tried using the 2nd IP with Putty (which is how I usually work on the machine) and couldn't connect.
I just had an ATT Uverse RG installed. However my Smoothwall router that previously worked fine with the ADSL SpeedStream is no longer accepting an address assignment DHCP ip address from this new gateway. (3800HGV-B)Any thoughts ideas or experience working with this hardware? ATT only supports Windows and Mac
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