Fedora Security :: Switch Off The Network Interface But Light Of Network Card Plugged In The Router Stays On (green)

Dec 26, 2010

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

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Ubuntu Networking :: Broadcom Network Card - WiFi Light Stays On All The Time ?

Dec 13, 2010

I installed Ubuntu 10.10 amd64 online today. I was using 10.04 32-bit before, and the network drivers were easy to find and install. Ubuntu did the job for me and they worked flawlessly. It was a relief I didn't need to search around.

Even though 10.10 (64bit) found the drivers for me, both ethernet and wireless, they do not seem to be working alright. I installed both, made a restart. I found that the WiFi light on my laptop stays on, even if the wireless network is turned off using either the key combination (Fn+F2), or manually turning it off.

Issues with the ethernet? I am right now using ethernet but it does not care to detect the connection. Empathy won't connect automatically as a result- says no network connection. But here I am, posting this. Evidently, there is a connection, right?

Issues with the wireless? The WiFi light stays on all the time, and it isn't able to get hang of the connection I have at home. It just won't show any wireless connections available. When I tried to connect by giving it the SSID and the encryption type and password, it didn't work. Just kept asking for the password again and again (I have checked with the router- the password is correct).

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General :: NIC Is Faulty Because When Plug The Network Cable In Get The Green And Orange Light?

Apr 5, 2011

Guy Im having issues getting my NIC to work. I dont think the NIC is faulty because when I plug the network cable in I get the green and orange light and I get the below result when running lspci | grep net

:~$ lspci | grep net
02:08.0 Ethernet Controller: Intel Corporation 82801BA/BAM/CA/CAM Ethernet Controller (Rev 42)


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Security :: Mount 2 Network Interface Card (NIC) And Make A Bridge

Apr 1, 2010

Actually i'm doing an ingenior training in SAGEM company, well i'm trying to develop an application which is able ti disturb the IP Network,my idea was is to mount 2 Network Interface Card (NIC) and make a bridge to pass the IP flow and to exploit the firewall Netfilter using iptables command.The application has to import a text file containing a binary array like this one:

0 1 0 : 0 corresponds to iptables -p ip ACCEPT
1 1 1 : 1 corresponds to iptables -p ip DROP
0 0 1

==> So the expected result is to have 5 ip datagrams dropped

My idea was: if 0 --> iptables -A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT
if 1 --> iptables -A FORWARD -p ip -m limit --limit-burst 1 -j DROP

The problem was: After executing the application and parsing the text file,
with iptables -L -v: i have

-A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT
-A FORWARD -p ip -m limit --limit-burst 1 -j DROP
-A FORWARD -p ip -m limit --limit-burst 1 -j ACCEPT

which is logic, but when i sniff with wireshark i find more packets are dropped(6,7 or 8 are dropped), like i had put more DROP rules. and sometimes i found the exact value(usually 5 dropped).

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Fedora :: Inactive Network Interface Card?

Aug 29, 2009

tell me how to activate my wired NIC permanently?Also, how do I disable the 'work offline' check box in Firefox.At present I am required to action both before accessing internet.

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Networking :: Network Setup - Router - Wireless Router Card ?

Apr 24, 2010

I'm having trouble getting my network set up the way that I want it/had it. You see, when I first set up my network, I just had my cable modem going directly to my standard wired router (A D-Link DI-604), which had DHCP,and was connected to all of the computers on my network. I had one switch hooked up to one of the ports of the router, but this was a regular switch, and it would not try to assign IP addresses, it would just pass through the DHCP info as I wanted.

Now however, my network setup has changed. My room mate and I both got laptops, and we decided that we wanted to have wireless access so we didn't have to constantly plug in to the router.

Now my network is set up like this: The modem is hooked up to the router(DI-604), which is hooked up on the LAN side to our computers, our switch (which is hooked up to 3 more computers), and to a wireless router card (A Gigabyte GN-BC01).

The wireless router card has two jacks for ethernet. One for WAN, and one for LAN. The LAN side we have plugged only into the computer in which the card is installed.

Now the problem is this: The wireless router card comes with DHCP by default, and it's assigning addresses to the laptops and to the computer hat it's in, and worse, the IP addresses are on a different subnet than that of the main dlink router. The Main (dlink) router assigns addresses from (itself) to, while the wireless router card assigns addresses from to (itself).

Because of this, I cannot access services on the wireless network from my wired network or vice versa. The first thing I tried was setting the card to assign addresses from to, however it just said "internal error" when I tried to do this. I decided that this may be because it sees that it was being assigned an address on it's WAN side on the same subnet. So the next thing I tried was disabling DHCP and setting the "LAN IP Address" to, hoping that the DHCP would just go through the card, like a switch. I would have set the LAN IP address to be assigned by DHCP, but this was not an option, so I decided that'd be the best thing to set it to.

Once again however, setting the LAN ip address to an address on the same subnet as that of the IP assigned to it's WAN side caused it to report an "internal error". I verified that this was the issue by setting the LAN address to several other private IP addresses to test (I.E.,,

My question then really is: How do I set up both routers so that I can access services and computers from each network from the other network. Should I set them with different subnets and set the gateway on the wireless network to the main router? To the wireless router card? Should I put them on the same subnet? Will it know how to communicate?

Here is a link to (picture) my network diagram. Network Diagram

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Networking :: Layer 2 Switch - VLAN Router To Network

May 15, 2009

Our ISP provides us with Layer 2 hardware (Modem?/Switch? (Hatteras)) for our leased line and internet access. I have been told that I should set up a VLAN capable router to separate the internet traffic from the internal traffic. I found that linux is capable of VLAN routing. Nice!

I have setup opensuse 10.3 put in two NICs and did the following
vconfig add eth0 10
vconfig add eth0 20
ifconfig public.ip.add.ress netmask eth0.10 up
ifconfig netmask eth0.20 up

Plugged this NIC into the HATTERAS hardware (with a straight cable), and thought that this way I should be able to ping the public gateway or any ip out on the internet. My ISP is telling me that I should create a VLAN trunk to be able to 'use the internet', but as I understand in linux if I create any number of VLANs on one NIC they are already trunked. I also got the info, that the traffic is tagged, and I can separate the traffic reading the tags. I already read that some NICs are not able to VLAN because they are not able to handle the increased packet size.

Also that the MTU setting is important (dono' the exact value though, only that its important). I thought that a linux machine can act as a router and firewall in such a case, because proprietary switches/routers use linux as embedded os. This is my first meeting with VLAN so if this whole post does not make any sense or you think that I just need to RTFM more then tell me! I also have some (3) Dlink 3226 Layer2 switches around, but I think it would be waste to use a 24 port switch on this subject.

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Fedora X86/64bit :: Floppy Light Stays On After Upgrade / What To Do?

Dec 13, 2009

I upgraded from F11 to F12 and since then the light of the floppy drive stays on. Is this a known bug or should I report this?

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Ubuntu Security :: Router - Port Forwarding And Network Security

Nov 11, 2010

As it stands I have a small home network operating behind my modem/router. Some of the ports on this are forwarded to my PS3 for gaming but I was looking at forward some for my file server.

At the moment I've forwarded port xxx22 to port 22 on my server for SSH for instance. ANd similarly 21 for FTP (although it doesnt seem to want to connect for any more than a few seconds using that). What I was thinking of doing was placing a small website for a handful of ppl to use on the server too and port forward again - xxx80 to 80. It works just fine but I'm a little concerned on the security front.

As I've moved the port to something different from the outside world I'm presuming I will have already cut the potential for malicious folks to wander in but is there anything else I should be doing? At the moment there's no firewall operating on the server, usually as its hidden behind the modem/router. But if I open this thign up more permanently what should I be doing? I've read a few articles on it but I'm always left with the overwhelming thought of "Thats if theres no firewall in my router" as they just seem to do the same.

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General :: Displaying All Network Interface Card

Mar 31, 2011

i am new to redhat linux,how do i list all newly added network interface card.can someone kindly help me with this?

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Fedora Installation :: "Error Configuring Network Interface" Halts F13 Upgrade With Atheros Card

Jun 6, 2010

After an online upgrade from f11 to f13, on rebooting the setup attempts to configure the wireless connection and fails with a not very illuminating "error configuring your network interface" notice, offering no option but to go back and try again, which of course fails again with the same error.

Wireless card is a D-link that works fine with the ath5k driver in f11.

how I can get out of this vicious cycle and proceed with booting the upgrade?

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Hardware :: New Network Card Not Mapping To Ethernet Interface?

Feb 21, 2011

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?


scattaneo@unthread:~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:1a:a0:8c:61:49
inet addr: Bcast: Mask:
inet6 addr: 2002:c0a8:6414:1234:21a:a0ff:fe8c:6149/64 Scope:Global


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Ubuntu :: Router Goes Out - Network Card Sleeps

Dec 17, 2010

Running 9.10 on the computer I am having a terrible time with.


I have a small office of 5 comps. I had a guy come in to change the router to a bigger one, to go from 4 to 8 outlets. I was changing the service, so first we went to the new company's smaller router and then to the bigger one.

Well, my old Dell and another older box never could get reconnected after the guy pulled out the smaller one and put in the bigger one. First migration was fine though.

I believe I have seen this problem before. I have had several instances of weird internet outages involving single (or worse, a pair of) machines that eventually can go back online. There are some serious bugs in NetworkManager I think which are putting these devices to sleep.


Symptoms I have already seen a lot around here. Yes, I have lights where the line goes in. The system will try to get a dhcp lease and then give up, telling me I am disconnected. That's it. I tried to install wicd on the machine that I reinstalled (again to 9.10), but it was the same, no way to get an IP address.

I have nothing in the networkmanager.state file at all. My nm.config.settings has a no-auto-default:00:16:82:XX:XX line.

And of course in frustration I deleted the eth0, so now I had to make a new one, and its not default.

Obligatory Begging

There is no way two machines have the same hardware problem at the same time. Plus, this is the third time in 6 months I have had two machines with connection problems, where we were checking lines against windows machines and wondering about hardware.

I am already resigned to re-installing on the Dell and hoping it goes ok (its really old). And on the other box (a server) I even re-installed multiple times and it still won't work at all, same symptoms. So I am worried at this point that both might be fuXXored by this bug.

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Security :: Turned The Router Off And On Again A Few Minutes Later Initially The Light Was Still Blinking Abnormally?

Mar 31, 2010

Not doubt this sounds alarmist, and perhaps it is... anyway, earlier tonight my mum complained that her home network connection wasn't working. After complaining about Windows and running a virus scan, I returned to my laptop, only to find my Ubuntu 10.04 was having the same problem. Then I noticed the wireless connection light (next to send and receive, which always blinks anyway) was constantly flashing, as if transmitting data, even though neither of us was connected, of course. I turned the router off and on again a few minutes later. Initially the light was still blinking abnormally, but I could now access the internet, as could mum, so I ignored it.

Later on, while the virus scan on mum's computer was running, Windows notified her she was running out of hard drive space - normally about 30GB of the 51GB HD is used on her laptop, but suddenly 50GB had been used. I also noticed my 275GB Ubuntu partition had 235GB free (although total size of files on disk was 128TB - a bug perhaps?), i.e. 40GB used, which seems pretty large for a rather fresh install and a handful of documents!Currently, everything's normal where my router's concerned (no blinking lights except for my browsing), and my Lucid partition is still showing 235GB free (strangely, mum's laptop now shows 46GB used instead of 50GB). So, what do we make of all this? Were our computers hacked for storage space?

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Ubuntu Networking :: Wireless Network Card For Router?

Jan 14, 2010

I am running ubuntu server x64 as a router. I currently have 2 LAN cards, eth0 and eth1. and I want to add wireless capabilites to the machine.I was wondering if any of you know which card I could use?I want it to be supported in ubuntu server and it must be n-draft, as it is to replace a Edimax n-draft router.

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Fedora Networking :: Blinking Wifi Light During Network Activity F15 / Fix It?

Jul 1, 2011

I had a problem with the new network manager a week ago and got it solved with help from the forum so now I'm back again. I have a dual boot with Windows 7 (I have to use it when serving my corporate masters) so I wasn't in my Fedora partition much this week.
I just noticed this and I'm positive it wasn't doing it before my network manager problem but I'm not sure when it started or if they're related.
I'm running F15. The machine is an HP Elitebook 8440p and has a wifi light that is also a touch button to turn the wireless on/off. Whenever there is activity on the network now it blinks between orange and blue. I know that isn't really a big deal but it's really annoying and is driving me completely nuts!! The normal behavior is orange when it's off, solid blue when it's on (or connected) and blinks orange/blue just while it's connecting. During network activity it's always been just solid blue and that's what I want.
I found a script that some Ubuntu users said fixed the same problem but when I tried to copy it the directory they said to put it in "/etc/network/ifup.d" doesn't exist. I'm assuming that's a distro difference between Ubuntu and Fedora?
Has anyone else seen this? Any ideas how to fix it?

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Fedora Networking :: Cannot Find Network Card While Setup Network Configuration?

May 25, 2010

Cannot activate network device eth0!"device eth0 does not seem to be present, delaying initialization".i cannot find my network card while i set up network configuration Now I use dual boot window 7 and fedora 9,I cannot find my network card in select network adapter while network configuration ,i have a network card Atheros AR8132 PCI-E fast Ethernet controller NDIS(620)and for wired in Accer laptop .

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Ubuntu Networking :: Insert Another Wired Network Card Into The Router-connected Computer

Sep 25, 2010

Would it be possible to insert another wired network card into the router-connected computer, share the internet connection and be able to transfer files between the two?

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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 eth0 As I have to eth interfaces and both interface got their IP from DHCP ( and 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
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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Debian Installation :: Network Interface Up But Network Manager Not Working?

Aug 20, 2010

Config: Squeeze, 2.6.32-5-amd64I just installed squeeze and the network is up and nm-manager deamon if working but the Gnome applet doesn't seem to work as usual. It indicates no network although the network is available as indicated by ifconfig and route below. When I switch WiFi on, the nm works flawlessly. When I click on the applet icon it says "Wired Network: device not supported" (or similar, msg in french is

eth0      Link encap:Ethernet  HWaddr 00:1f:e2:12:ea:d8 
          inet adr:  Bcast:  Masque:
          adr inet6: fe80::21f:e2ff:fe12:ead8/64 Scope:Lien


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OpenSUSE Network :: Lost Wired Network Interface Eth0

Feb 14, 2010

Last night while setting up wired & wireless connection in openSuse 11.2 Gnome version via YAST's ifup, I got wireless but lost wired connection (interface eth0). Dmesg shows that eth0 became eth1. I cannot get eth0 back. Is there any way to remedy this situation, eg. get info from the Ubuntu partition in my triple-boot laptop, without having to re-install openSUSE?

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OpenSUSE Network :: Start Network Interface At Virtual Terminal

Mar 1, 2010

I would like to use zypper to update openSUSE 11.2 through the Virtual Terminals (tty1 thro' tty6).

Network Interface is wlan0 (Wireless LAN, home network through a Router) that requires a password using WPA2.

My question is how to start wlan0 through the command-line ?

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OpenSUSE Network :: Hostname Not Saved In Router Table / Broadcast It To Entire Network?

Jun 13, 2010

I setup the hostname for my linux machine to Linux. If I try ping Linux from the same computer it works. If I try from another computer inside my network the host can not be resolved. If I ping the IP from another computer it works.

I take a look in my router at DHCP client list and my linux machine doesn't have the Hostname set up.

How to broadcast the hostname to the entire network?

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Networking :: Install Mrtg On A Client Computer In Network And Measure The Network's Router Traffic

Sep 4, 2009

I wanted to know if i can install mrtg on a client computer in network and measure the network's router traffic.i know that it can be installed on the server.

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OpenSUSE Network :: Network Manager Won't Connect To Wireless Router

Apr 15, 2010

All settings are correct as far as i can tell. The wep key works on all my windows boxes. When i have connect automatically enabled it never tries to connect. if I go to edit it it pops kde wallet up i put in credentials. wallet goes away then nothing happens. if i double click connection to my router also nothing happens. I have the wep key in there and i even made it visible to make sure.

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OpenSUSE Network :: Network / DNS - Can't Access Any Internet Resources Or Router

Jul 30, 2010

I'm having a strange problem with my network connection/DNS. I turn computer the on and it recognizes and connects to wireless or wired but I can't access any Internet resources or my router. If I ping the default gateway, I get no response and I get DNS errors from any network services that run at start up. If I stop and start the network daemon then it all works fine until the next time I turn on my laptop. It does this for both wireless and wired connection.

I've tried to edit the network interface information in YaST but it says that configuration is handled by knetworkmanager and I have no idea where that information is accessed. I should point out that it all worked fine until I tried to connect to open WAP at my school and couldn't so I connected to the wired network. Next morning I had this problem when connecting to my home network. My questions are 1. What could be the cause of this error and 2. where does one configure the network interfaces when using knetworkmanager

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OpenSUSE Network :: Network Connection Fails To Go Past Router

May 16, 2011

So up until I updated from Opensuse 11.3 to 11.4, I hadn't any issues with my network connection. At least none worth mentioning. Once I installed 11.4, I've had weird issues with varying lengths of connection. Sometimes I can't connect anywhere, sometimes I can only get to the router, sometimes I'm 100%. I'd fiddle with YAST until everything worked. I honestly have no clue whether or not anything I did had any effect.

Enough of the iffy history, here's what's happening now. For the past few weeks up until last night, I have been at 100% connectivity. I never turned off my computer until last night (it just shut itself off, like the cord was unplugged. I dunno what happened, maybe it was my foot, maybe the PSU. I think it has happened before.). When I turned it back on, I was only able to connect as far as my router (, a D-Link Gaming router that has always been very good to me). I could not make it to my modem (, a Quest DSL modem. Once I can get here, then usually I'm good to go 100%).

I tried again this afternoon, and no change. I then get the crazy idea to unplug the ethernet cable from it's PCI-card home and return it to the onboard port (which I long ago declared defunct). Immediately after plugging it into that port, I ran "ping" and I started getting returns. I open up Firefox and try to load an external page, and nothing happens. I go back to the console that I was pinging from, and it had stopped. I start pinging my router, and no luck. What I conclude from my little experiment is that the router is not at fault.

1. It did not change at all between being at 100% and being at 0% after reboot.
2. I was able to get returns from the modem, past the router, for a brief period of time while using the defunct ethernet port.

Since I never had these problems before updating to 11.4, I'm inclined to believe that it was the update that started these problems.

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Ubuntu Multimedia :: Webcam In Skype - The Green Light Comes On By The Built In It?

Mar 19, 2011

I have a ASUS K52J.I tried cheese.It was initially upside down. Then I tried Video for linux device preferences.When I checked vertival flip, that fixed cheese. But it was still upside down in skype.I tried downloading skype from the webpage, and from synaptic.I tried running skype in sudo.I tried: export LIBV4LCONTROL_FLAGS=3 && L

D_PRELOAD=/usr/lib32/libv4l/v4l1compat.so skype but i get: ERROR: ld.so: object '/usr/lib32/libv4l/v4l1compat.so' from LD_PRELOAD cannot be preloaded: ignored

and I tried: export LIBV4LCONTROL_FLAGS=3 && LD_PRELOAD=/usr/libv4l/v4l1compat.so skype
ERROR: ld.so: object '/usr/libv4l/v4l1compat.so' from LD_PRELOAD cannot be preloaded: ignored.I tried this:

LD_PRELOAD=/usr/lib32/libv4l/v4l1compat.so skype
When skype loads up, i go to the options>video>test. The green light comes on by the built in webcam, then i get a segmentation fault and skype crashes: /usr/local/bin/skype: line 2:4055 Segmentation fault LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so /usr/bin/skype

Then I tried:LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so then running skype and i got the segmentation fault again.I may have missed some threads on this but everyone else seemed to be thanking someone for fixing their problem by now.Finally I tried threating my computer with a Windows installation. But I think both me and the computer knew it was a hollow threat,

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Debian Configuration :: ZTE MF112 Modem Setup - Light Stays Permanently Red

Oct 1, 2010

I recently got an upgrade from my mobile broadband provider (3 UK) that included a ZTE MF112 modem. I found that (unlike the Hauwei modem that preceeded it) this item did not work "out of the box". After a bit of googling around I decided that a good starting place would be to upgrade the OS on my laptop. I've been meaning to do this for a while anyway so have just installed Squeeze (the i386 version, on Thinkpad x61). I think it's now pretty close to working "out of the box" but annoyingly isn't quite there. I thought of getting a ZTE modem to work say that usb-modeswitch needs to be used to make it not load as a cdrom. However, it appears to load correctly without any alteration (in fact, adding the /etc/udev/rules.d/zte_eject.rules file I have found described appear to do the reverse and make it load as a storage device - at least an icon for it appears on screen).

lsusb correctly lists it as device 19d2:0031 and identifies the device as a ZTE MF636 (though it says MF112 on the package). Looking at the Network Connections tool there is an entry for 3 mobile that is, afaik, correctly configured. If I click on the network applet on the toolbar, there is a bit of contradiction: towards the top of the drop-down list it reports mobile broadband as not enabled, but further down under the "available" list is an entry for "3 internet". I haven't paid too much attention to the not enabled entry because it also reports the wired network as not managed, so maybe this is just a quirk of network manager. - I know you have to comment out eth0 entries in /etc/network/interfaces to have network manager deal with the interface in Squeeze. There are no entries for the mobile connection in the interfaces file.

If I click on the 3 internet entry the applet goes momentarily into trying to connect mode (the circling dot) but very quickly pops up a Disconnected box, and that's all that ever happens. I note that the light on the modem stays permanently red. On the old Huwei it started green but went blue, and I think I read something about it also changing colour on the ZTE. On the other hand, the Hauwei didn't show up on the network manager list until the light had turned blue, whereas this does seem to be there. It looks as if the problem is something fairly trivial since the device appears to be both recognised and (almost!) correctly configured. How to sort this.

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