Someone just erased my HWADDR line from /etc/sysconfig/network-scripts/ifcfg-eth0. How can I obtain my original MAC address?
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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.
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.
I'm looking for any snippet to manage MAC address via C code in Linux. I tried to write some code to change eth0 mac address writing it in smc911xx eeprom. What I did is the following..
#... some includes...
...
int skfd;
struct ifreq ifr;
[code]....
Just curious, because it seems my wireless connection works regardless of whether or not the MAC address is listed there. I'm just curious why that option is there to add it if it works regardless.
View 2 Replies View RelatedI have a ppp0 entry with post-up options like this
mapping ppp0
map none photon-plus motorola
map timeout: 12
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Well I really don't understand why Fedora Project has changed the way to start in the level what I need by changing the inittab file. Now is a bit complicated and following the instruction in the fedora.wiki the only thing I get is block my access to the graphical interface and blocked the access to my shell. I've deleted the original 'default.target' file and replaced it by the multi-user.target pointing out to the 'runlevel3.target'. Thus the only thing is my blue screen with Fedora logo freezed. How to recover my graphical interface?
View 14 Replies View RelatedI'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
View 2 Replies View RelatedI 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 ?
View 1 Replies View RelatedIm trying to achieve the multiple uplinks/provider found on LARTC.org. I have to get the IP addresses from my interfaces (EF1 and EF2) by using a script, but i dont know where to look at for the default gateway from each interface which got their ip address from my ISP.
View 1 Replies View RelatedWhen I do ifconfig than IPv6 address is appearing on an interface. However when I run the system-config-network and select to edit same interface than it shows the normal ip4 192.168.1.x address. Why is it like that? ipv4 at one place and ipv6 at other?
View 3 Replies View RelatedI recently just upgraded from humble Linux user to confused Linux admin of my own virtual Linux server. When I issue the ifconfig command I get following output.
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venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:1.2.3.4 P-t-P:1.2.3.4 Bcast:1.2.3.4 Mask:255.255.255.255
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
The WAN IP of the interface is not really 1.2.3.4 I just changed that IP for security reasons.What I am trying to figure out, is it possible to assign a private IP address to the same interface or can I only have one IP address per interface. I understand I have a mask of /32 so I am not going to be able to subnet the address to create any more addresses, so I assume I am stuck with the WAN IP (public IP) that I have, and just need to deal with it.
The reason I ask this is because I have been reading through several DNS/BIND tutorials/walk-throughs, and a lot of them specify setting up a intranet access with 192.168.1.1 address for the local DNS server, but since I am connecting to the sever via SSH I figure I do not need a private IP address.
how to do a virtual interface under linux. I'm using for example eth0:1 so ifconfig eth0:1 192.168.0.20 netmask 255.255.255.0 for example.
However if i do eth0:1 hw ether 00:11:22:33:44:55 It changes eth0 as well. Where should i look into for creating a separate virtual interface that's simply bridged with one of the existing interfaces that has a separate ip and hw address that the os handles.
Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.
So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.
My files are as follows:
I have installed Fedora 10 on my A860 Dell Vostrol Laptop with AR242X Atheros Wireless card. Wireless card worked out of the box and i could detect wireless network and connect to it. But i have a problem that, my wireless connection is not able to get IP address from the DHCP server. Please help me out what can i do to get this working. I am using WEP security and authentication is open system.
I have windows 7 beta installed on the same machine and on that wireless network works fine so i am sure that there is no problem with the wirless network. I am using DIR-300 router from D-LINK. I tried to see packet log on wireshark and there i see that there is no reply to the DHCP discover message. Actually i don't see any RX packets at all. Which is not normal as there is traffic on the network.
I have two network interfaces in my pc eth0 and wlan0 and a virtual one br0.
router <= eth0 (0.0.0.0) => br0 (192.168.1.10) <= wlan0 (0.0.0.0) => other pc.
On startup of my pc (ubuntu 10.04 server x64), samba bind itself only to loopback network interface, as i can see when i do netstat -an , preventing me to enter in my shares from a remote pc.
Here is my configuration regarding samba network:
Code:
interfaces = 127.0.0.0/8 192.168.1.0/24
bind interfaces only = yes
and my /etc/network/interface
Code:
# The loopback network interface
auto lo
iface lo inet loopback
code....
Any idea fo speed up my bridge configuration or to force samba to wait unitl the bridge is ready?
I'm using a D-Link Xtreme N PCI express wireless adapter (DWA-556). It shows up in the network manager.
However it does not get an ip address from the DHCP server. Below is what I get in the messages log:
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.
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?
I have a laptop connected to the the net thru an adsl modem, when I switch off the laptop network interface,(thru system-config-network) the light of the laptop network card plugged in the router stays on ( green) where as in my pc, when i do the same thing , the light of my pc network card goes off in the modem
View 5 Replies View RelatedWhen I create virtual ethernet interface and do a ping -I <v_int> <host> the outgoing address is the one of the physical interface and NOT the virtual interface.Is there no chance that trafic will go out with virtual interface address??Incoming trafic is done well i.e. responds to the virtual interface have the virtual address.
My problem is that I have 2 modems and want to check both default gw behind the modems.
If I do a "normal" ping both are reachable over default route even the modem which is not the default route will not work because ping goes over the working modem.So I have 2 routing tables and want to route the virtual interface to one modem the other to the other modem
I replaced the old WIFI card (Intel PRO 3945ABG) in my Dell D620 with the new Intel Ultimate-N 6300.
According to intel's website the driver is integrated in the current kernel (mine is 2.6.34.7 61.fc13.i686.PAE) and I have the latest firmware installed as well (iwl6000-firmware-9.221.4.1 1.fc13.noarch) however it does not work.
I tested the card with Windows XP and it works perfect.
The output from "dmesg" is:
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But with my previous card "lspic -v" will show the driver in use but the new card does not:
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So it detect the card for some reason does not assign it a driver!
And i googled this "Unsupported (too old) EEPROM" and found some results related to Ubuntu but were not useful.
So am I missing something? what does that message mean "Unsupported (too old) EEPROM"?
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:
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Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
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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?
View 1 Replies View RelatedI 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]....
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?
View 1 Replies View RelatedHow to figure out why there are errors on bond0(eth0)
Transfer speed is in KB
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]....
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?
View 4 Replies View Relatedi 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
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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.