Ubuntu Networking :: Machine Lost Controls Over Network Cards
Jan 14, 2011
I'm running xubuntu 10.04 LTS (upgraded from 8.04 LTS) on an old low power sempron machine as an always on 'internet machine' i.e. it does all my downloading email etc. and up until yesterday it has always performed flawlessly. Yesterday wasn't its fault, it was a BTI network problem that took out my internet service but while talking to tech support I realized that this machine has lost all ways to control the network cards. Network-manager and network-manager-gnome are installed according to synaptic but they have no menu or notification appearance. I've tried reinstalling them to no avail.
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Feb 23, 2011
I want to know something: i have a OS based on Debian configured and installed on a machine that controls all the network. Then, I can access it via another machine (with Windows for example) (connected by crossover cable or using a switch) by a web browser where I can do everything, including adding hosts, adding users, configure mail servers, voip, configure domains, etc etc etc..I would like to install Nagios on my server but I would like to monitor the hosts, routers that I have on the network using the Windows machine. How can I do that? Isn't it supposed to access the nagios information only in the machine where it is installed?
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Mar 16, 2011
Im running 11.3 w/ KDE 4.6. I was using Kmix today without issue and accidentally (perhaps out of curiosity) clicked the 'close' box on the tab which presented all of the volume controls. The thing is, I cannot seem to find out how to recreate it. I seem to recall there was some option to create multiple volume control tabs, but I cannot locate.
Could someone point me in the right direction on how to recreate the tab or delete the kmix settings/config which I assume would re-create defaults?
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Apr 12, 2010
So I am looking to modify my network cards MTU (for some testing purposes), and I only know how to do it it Windows (via command prompt ping command with special flags) and not in Ubuntu.
Any easy way to figure out proper MTU numbers in Ubuntu?
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Mar 18, 2010
I have an ubuntu kk laptop connected via wireless to my mixed network (xp, win7, other ubuntu), but i can not ping said machine or connect via ssh. Internet and smb-browsing ON this machine work, as does pinging FROM it. If this was a windows machine, I'd say a firewall is in the way, but since it's a vanilla karmic install, this should not be the case (or should it?).
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Jul 24, 2010
It seems whenever i create a folder it creates the folder as untitled folder, but i can't change the folder name it just says "you don't have permission to rename item" but yet i created the folder and it is there. One thing i have noticed is that once i enter a folder it won't even let me move the folder.
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Dec 3, 2008
I have ubuntu-8.04.1-server installed on virtual machine. It works perfect. Now, I made copy of this virtual machine. I started that copied machine and it works fine, except one thing: network does not work!
I have several others VMs with freeBSD, openBSD or Windows on it, but only ubuntu machine hes network problem after coping. I tried some other VM with ubuntu on it - same problem! I downloaded VM with ubuntu - same problem.I take a look into /etc/network/interfaces file and it looks just as it should (same as before coping) but ifconfig command returns parameters for lo only (before coping there was eth0 and lo).
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Jul 8, 2010
I have a small pc running fedora 8 with iptables and 2 network cards for routing/firewall and secondary DNS.For some time I've been alerted by the network guys that this machine was generating some alerts. The real network IP address keeps being assigned to the other interface, intended for LAN only (10.0.0.1/24).I've already changed the PC, installed a more recent operating system, replaced the 2 network cards and the problem persists. I have another pc running the same services (except DNS) in a very simillar way and no alert logs from that one.onder if it is some configuration issue on my startup firewall script.I've also installed arpwatch and I could confirm this IP and physical address issue:
Arpwatch output:
hostname: my.host.name
ip address: my.ip.address
[code]....
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Apr 7, 2010
I have installed CentOs 5.4 for Snort sensor , on the location where i intend to place the Snort sensor to listen for internal firewall leg (LAN) the switch doesn't support port mirror so i would like to create with 2 nic's bridge and pass trough the firewall internal leg my question how do i set such configuration.
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Mar 29, 2011
I have installed slackware 13.1 64-bit version and can not recognize network cards.I'm with laptop acer aspire 7540g.Wireless card is atheros ar5b93.Ethernet card is Broadcom NetLink � Gigabit Ethernet.
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Nov 2, 2010
I've got two NICs connected to two different routers, and on different subnets of course. Each is set for static IP. But somehow I must have mixed up the connections at some point, so the NICs don't always have the IP addresses I expect. I think there may also be a mixup with different ways of setting the network addresses. When I click the Network Icon on the Desktop, I see that each NIC has both addresses as options. The /etc/network/interfaces file has some information about eth0, but all commented out, so there must be another place the addresses get set. And I just discovered that eth0 and eth1 aren't physical but virtual. I guess eth0 is the first one that is set.
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Nov 30, 2010
I'm new to Ubuntu - I've decided to give Ubuntu Studio a go as an alternative to Windows. However, after installing it, neither of my network cards work. I have a Intel Pro Wireless 3945ABG wireless card, and a Broadcom Netlink Gigabit Wired card. Neither work, And I'm not sure how to. I've tried searching, and have come up with the .tgz file here, but I have no idea what to do with it I'm concentrating on the wireless card for the moment, seeing as that will be the main one I use.
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Jul 6, 2010
I had run one script in unix machine and want to copy the results to a windows machineBoth the machines are on different networksIn linux machine trying to do the ftp to the windows machine its giving connection refused. How to chech whether ftp is running on that linux machine or not?Also tried scp and ssh , both are failing
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Jul 5, 2010
Ok, so I've gotten tired of my router, and I've decided to make my own using IPFire as the OS. Right now I'm looking for ethernet cards that I can use for the green network, but I don't know if I can use 2 for the same network. I'm trying to get 4 ports at 1000 Mbs, and the only thing I've been able to find so far that's within my price range is a card from startech that has 2 ports, but would I be able to use 2 for the green network?
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Sep 26, 2010
I've got two network card interfaces on my computer, one wireless and one wired. The wireless card is connected to the Internet and the wired is connected to the LAN. When only the wireless card is active, Internet works. As soon as i enable the second wired card, Internet stops working. And it seems like Ubuntu chooses the wired card for Internet as soon as it's enabled.
Are there any ways to solve this? So my Ubuntu box always chooses the wireless card for Internet traffic and let me use the wired device for LAN only?
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Mar 1, 2011
I've run into a weird problem. Two of my linux machines (A and B, both running CentOS 5.5) are connected to the same wall ethernet socket via a hub. Bothf them are configured for static IPs. The trouble is that when machine B goes offline or hits a kernel panic, machine 1 goes offline too. What I've noticed is that in this condition the "route" output from machine A does not show any entry for the default gateway either The contents of /etc/sysconfig/network-scripts/ifcfg-eth0 for machine A are:
Code:
# Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller
DEVICE=eth0
[code]...
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Feb 16, 2010
I've been trying to understand how Linux creates the network/interfaces on a machine (been reading the Linux admin guide), but as I'm pretty new to this subject, I've got lost in the forest.
To provide with my goal:
1.) Learn about network setups on Linux
2.) Be able to maintain my own (virtual) network
3.) Configure my (virtual) network
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Mar 1, 2009
I have a fedora 10 box with two network card on eth0 I have a pppoe connection to the internet, on second card eth1 I share my internet connection end I set up a samba server but I don't know if the settings are good. How to do this settings right to work fine, the ip are assigned by dhcp I don't use any static ip .When I try to browse the internet from the other computers some site's like {.com ; .org ; .info} are block, other site from {.ro} are working. Someone tell me something about turn off all my filters, but I don't know where to find this filter to turn it off. And when I use samba I can't have and internet access or vice versa. My network look like that:
Code:
eth0
|<--pppoe connection
|
MyComputer
(fedora 10)
|
eth1
|
switch
|
comp.1 comp.2
Win OS MacOS
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Jun 2, 2010
I have a strange problem regarding networking on the Alix 2d13 running Ubuntu 10.04. The Alix has 3 physical network interfaces, lspci says:
Code:
00:09.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine
00:0a.0 Ethernet controller [0200]: VIA Technologies, Inc. VT6105M [Rhine-III] [1106:3053] (rev 96)
Kernel driver in use: via-rhine
Kernel modules: via-rhine
[Code]...
It seems, if more than one cable is connected, a random hardware port is chosen as eth0-eth2. If only one cable is connected the port that is connected is chosen as eth0-eth2. Any idea what's going wrong here?
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Nov 17, 2010
I have just upgraded to Fedora 14, with some hope that a F13 kernel crash issue would be resolved. Alas, not, and I have lost audio in one of my sound cards. I am using 2 sound cards in my computer. The first one (VT 1708 on the M2V MX SE motherboard) is used for FLDIGI (ham radio program). The other one (Creative Labs SB Live!) is tied to a speaker/microphone. At some point in mid 2010, I started getting kernel crash reports (not sure which kernel version this started), and the VIA VT 1708 audio controller stopped working. The SB Live! card works fine.
From mesg, I get:
[9.181148] WARNING: at drivers/pci/pci.c:105 pci_ioremap_bar+0x2c/0x5b()
[9.181186] [<c05c36ad>] ? pci_ioremap_bar+0x2c/0x5b
[9.181194] [<c05c36ad>] pci_ioremap_bar+0x2c/0x5b
[9.181299] ALSA sound/pci/hda/hda_intel.c:2510: ioremap error
I've just pulled out the SB LIVE! card to see if it is causing the VT 1708 controller to fail...there appears to be no interaction.
From lspci -v, I get:
20:01.0 Audio device: VIA Technologies, Inc. VT1708/A [Azalia HDAC] (VIA High Definition Audio Controller) (rev 10)
Subsystem: ASUSTeK Computer Inc. Device 8290
Flags: fast devsel, IRQ 17
Memory at <ignored> (64-bit, non-prefetchable)
Capabilities: <access denied>
Kernel modules: snd-hda-intel
So it seems to know it's there. How to get my sound back (and get rid of this kernel crash every time I start my computer)?
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Dec 2, 2010
My latop has suddenly lost it's ability to see my main computer. I have changed nothing other than updates and a few non-network related program installs. The laptop is an HP Pavillion DM3 running 10.10 and the PC is a Dell XPS400 running 10.04.01. I have both Samba and folder sharing in use. I have checked all the permissions etc on the shares and in Samba and everything is as it was and should be. So I am confused. How do I get it back and why did it go away?
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Mar 25, 2011
My first post. I lost all connections to the internet on my Linux Box Yesterday. I have checked my broadband connection and router. OK because I am using them to sent this from my laptop. I have 2 ethernet cards - no indication of a problem with either so I suspect for reasons unknown I have lost all my network settings. The Desktop User Guide says go to the Network Settings Window. I used to have a widget on the Menu Bar which enabled me to check the settings but for some reason it vanished a month or so ago and I can't find how to get it back.
PS In the meantime I am stuck with this crummy Microsoft box the interferes with everything I try to do.
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Oct 23, 2010
I can't think of any obvious reason. I have two Ubuntu 10.04 machines. Each has a two disc RAID array for redundancy. Both are on my class C network (192.168.1.3 and 192.168.1.5). Both can access internet through router and I can "reach" each with a windows laptop (I can ping, login via SSH, reach webmin, SAMBA, etc). However, all the sudden, I cannot reach either linux box from the other linux box. It fails "both ways," meaning I can neither ping, login via SSH, use a SAMBA resource or in any way see the "other" linux box from one. This seemed to occur about two weeks ago (maybe after an update?). I've been using Unison to sync the RAID arrays - but not, I cannot sync at all. The only thing I could think of is to check hosts.deny (and allow) which are distribution default (unchanged)...
If I traceroute to the router, I get "1 XXXXX (192.168.1.1) 0.543 ms 1.217 ms 1.204 ms." However, if I try it to the other linux box, I get "3001.294 ms !H 2001.280 ms !H 3001.264 ms !H" which evidently means host unreachable. So it can get to the router (which has the windows box which can see both linux boxes). I just can't think of any reason why/how this could happen? Not sure how what is wrong with hosts file (I have made no changes and it accepts ping/ssh, etc from windows machine). Any ideas would be greatly appreciated.
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Feb 25, 2011
I've installed Ubuntu Server 10.10 with two network cards. One for external, and one internal.My problem is that as soon as i activate eth1 (external), i can't access the server from the internal network (eth0)
With these settings i can't reach the internal network from inside.If i disable the gateway on eth1 and enable the gateway on eth0, it works.
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Feb 12, 2011
I have had long term access to a networked HP Photosmart printer but now I get the following message:
Unable to open device hp:/net/Photosmart_C5100_series?ip=192.168.0.161.
when trying to access it.The ubuntu desktop is wired to the router as is the printer and another iMac wirelessly can still print to the HP. HPLIP status shows the icon for the printer but with a red x indicating no connection to it.The only recent network change was the removal of another router from our network. (service is DSL via a combo modem/router from service provider which previously was connected to a Dlink router which has now been removed from the chain b/c was redundant to the modem/router)
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Apr 19, 2010
When there is a power failure at my university for about 30 minute, my computer stays up because of a UPS, but the switch it is connected to via ethernet is reset. After this, my machine loses network connectivity until I manually select the network using nm-applet.
In System -> Preferences -> Network Connections, the network has the "Connect automatically" box checked.
However, in /etc/NetworkManager/nm-system-settings.conf, there is a line that says:
Code:
no-auto-default=00:30:48:b0:11:07,
and that is the MAC address of the ethernet card.
I'm running Ubuntu jaunty.
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Jul 30, 2010
I have installed Lucid in a new laptop. Things are running OK except for the following problem:
I connect to the network/Internet using Wired ethernet (TCP/IP) with static IP. Everytime I reboot/restart my network configurations are lost and I have to re-configure. I have googled this problem and have seen a few posts/bugs in launchpad etc. for what appears to be the same issue...but unfortunately I am not getting a clear solution to this problem.
Just for clarity, I am using the following commands to re-configure my network everytime:
Also note that I have already tried editing the /etc/network/interfaces and the /etc/resolv.conf files. But it seems that these are not being picked or are being overridden.
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Nov 1, 2010
I had some problems installing 10.04, which I'm not going into here unless I have to, but it appears to be up and running now except my PC can't access the network, even though it's wired. This is the first time I've tried putting on a new build by myself as my son always used to do it (my PC used to belong to him many years ago, and is old, like me.)
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Jan 19, 2010
I have suddenly lost the desktop icon (of a hard drive) for a mounted network share. It is funny because, I have other network mounts which share the same server, and there icons are appearing, and this particular share just does not show up with the icon, even if I try mounting it different locations in the filesystem. Any ideas. I really like those cute icons on my desktop.
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Jan 30, 2011
I initially loaded Fedora 14 onto a Desktop and started to configure it to be a server but as soon as Iso software updates My network connection completely drops.
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