CentOS 5 :: Difference Between Network And NetworkManager Service
Oct 26, 2009
i just finished installing CentOS 5 in my laptop. While I was trying to configure my Wireless network to connect internet, I found a guide in CentOS site which recommended to start "NetworkManger" service so as to setup wireless network. I followed and it Worked great.
But i would like to understand the difference between "Network" service and "NetworkManager" service. I had initially thought restarting "Network" service would help. explaining the basic difference between these 2 services.
After reading and trying tons of tutorials and several OS reinstalls, I'm stuck trying to load wireless on my Dell Vostro 1400 laptop. Before you say search forums! I hurry to tell I did. No solution seems to work. WLAN chipset - Broadcom's BCM4311 / BCM 2050. 1st scenario - native CentOS 5.3 drivers Although CentOS recognize WLAN card and displays it's name correctly, neither network or NetworkManager sees any of wireless networks.
2nd scenario - Broadcom's drivers Most know Broadcom has released Linux drivers. I had some more luck with them than in 1st scenario although problems occur. After successfully compiling Kernel module, wireless networks are discovered and can be successfully connected but no pages load. It seems like DNS is not resolving at all and page loading timeouts instantly. Tested on TKIP-encrypted network.
I am unable start network service on my centos box. /etc/init.d/network start device eth0 does not seem to be present, delaying initialization lspci | grep Ethernet
Doesn't show any results. It seems os doesn't identify my NIC. I am using compaq presario model pc
I have recently installed Centos 5.4 on a server with 3 network cards. I am trying to enable IP forwarding which has been successful by executing the following command:
echo 1 > /proc/sys/net/ipv4/ip_forward
I tried to make this permanent by adding net.ipv4.conf.default.forwarding=1 to the /etc/sysctl.conf file.
When I restart the network service I get the following code...
I am using # uname -rmi 2.6.18-194.26.1.el5PAE i686 i386
# cat /etc/*release* cat: /etc/lsb-release.d: Is a directory Red Hat Enterprise Linux Server release 5 (Tikanga) CentOS release 5.5 (Final)
I have noticed that after few days of ideal system it will stop its network interface. To resolve this I have to login to the machine it self and then issue # service network start Is this a feature. If this is not a feature then what is this. As an workaround I am thinking of adding service network restart in cron tab for everyday in night when I am not using it.
I'm running Squeeze and I'm looking 3 days now for a solution in some weird problem. The NetworkManager Applet shows that there isn't connection although I am connected. The icon has this small "x" and when mouseover it says "No network conncection". Moreover when left clicking it, it says
"Wired Network Device not managed"
While I was looking for the solution a came across this post by an Ubuntu developer who says:network-manager-applet displays the connectivity state of network-manager's managed interfaces not every interface. So the title "network manager says disconnected but is connected and working" is actually misleading. The interface is connected and working but not from network-manager's point of view since it is not managing the interface. Additionally, in Lucid now network-manager applet displays nothing now for non-managed interfaces so is less misleading. You can check to see whether or not an interface is managed by network-manager by using the command line too nm-tool. You'll see "State: unmanaged" for unmanaged interfaces.
I had a google of this but can't find anything useful. I use networkmanager to configure my wireless card. Currently this only works when I'm logged in to KDE. If I log out the system loses the network connection. Is there a way to make it persistent using NetworkManager?
since a few weeks I have a problem connecting to other hosts when I'm using another wireless network, which has a different DNS IP than I have in my network. I have to change /etc/resolv.conf to change the nameserver. Can NetworkManager control the nameserver? If yes, how?
I am in the process of building a new server on an Asus P5QPL-AM motherboard and an Intel E8600 processor.explain to me the difference between the two versions and what would you recommend.Also, is there any advantage of SATA over IDE hard drives?
The resolv.conf is not written correctly every time i reboot the machine...it seems to ignore all sysconfig configurations !
this is the resoult resolv.conf after every reboot
# Generated by NetworkManager # No nameservers found; try putting DNS servers into your # ifcfg files in /etc/sysconfig/network-scripts like so: # # DNS1=xxx.xxx.xxx.xxx
I am experiencing troubles when connecting to my new private network under Linux (works fine with Windows). I cannot get an ip address and the logs tell me a bit more, but I would like to know how to proceed to resolve this issue. My network adapter is an Intel Wifi Link 5100 using the iwlagn driver. Connecting to other WEP APs usually works flawless, it's the first time my system won't connect at all to this particular WEP encrypted access point.
I seem to have somehow messed up my repositories and now NetworkManager isn't working.
I have two errors happening, which I'm sure are related. First of all, when I try to load knetworkmanager, I get the error:
Code: knetworkmanager: error while loading shared libraries: libkminterminals.so.4: cannot open shared object file: No such file or directory Second of all, when I restart my computer, upon loading I get a message from Akondi Server Self-Test saying several databases failed. I've never seen this before, so I think fixing these errors would be best? Some of the errors are MySql failed, akondi not registered at dbus, etc.
Lastly, I don't have a wired connection so currently my machine has no internet. I'm using a second laptop to get necessary files and I transfer them with usb.
I have installed qemu/kvm and created a Bridged network connection which works just fine(Windows 7 VM won't work in NAT mode.)
But when I try to use NetworkManager it says that I have no network connection because the network isn't managed, (I set the settings in ifcfg-br0 and ifcfg-eth0 to be managed)
The real problem is that now I can't use my VPN connections (I have many) in NetworkManager.
Is there a way to have both of these pieces of functionality?
I just want to know one thing. I had stop the network service in ubuntu, still i can able to ping google.com.what u think might be things to consider. these are the outputs see.
I just installed CentOS 5.2 and then applied the updates to 5.3. Now I get repeated popups saying:
The NetworkManager applet could not find some required resources. It cannot continue.
I killed it and ran it from a terminal and saw the following output:
** (nm-applet:4648): WARNING **: Icon nm-device-wwan missing: Icon 'nm-device-wwan' not present in theme ** (nm-applet:4648): WARNING **: No connections defined
I'm using CentOS 5.4. I want to set-up a PPTP connection (I'm the client). I installed the NM pptp plugin from EPEL's repository. I have configured my PPTP connection in the NetworkManager applet but now I don't know how to connect to the server, I mean, there's nothing like 'Connect now'.
I find that the new KDE4 notification icon is not very easy to see.The "progress" indication is a microscopic vertical progress bar, that I find very difficult to interpret.OK, it is a minor annoyance, but I do find that I regularly try to use the network on my laptop before the connection has been established.It is also a regression over the icons in 11.1 or before, which were very clear.If people agree with me on this point, I will post a bug, with the aim of getting a clearer icon.
I installed OpenSuse 11.2 LiveCD. I'm currently running patch download and installation so maybe this will fix my problem. When I use NetworkManager, WPA or WPA2 are not an option. I'm give four encryption methods (WEP 40, WEP 128, LEAP and Dynamic 801.x) Is this a problem with my Thinkpad T23's 802.11b wireless card? Do I need to install a patch?
I have a successfully connected VPN connection. When hovering on the networkmanager applet it show beside the wireless connection also the connected VPN. The icon also changed from staircase-bar to staircase-bar with forelock. Oh yeah I'm using GNOME desktop.However when right-clicking on it and choose Connection Information I can only found tab for the wireless connection. How can I have the information tab also for the VPN connection, showing like IP address and gateway used?
I just tested Networkmanager on OpenSuSE 11.2. I tried with my wired connection and it works.
I thought I test to connect with network sharing with my Android phone. The Android phone connects according to Networkmanager, but I'm not sure if it actually works as the wired connection is still active.
I tried to figure out how to disable the wired connection, but eventually gave up and just pulled the wired network plug.
But surely, there must be a way to disable connections from Networkmanager?
On fresh install of 11.4 everything worked fine, but after some updates networkmanager stopped working properly on my netbook (intel atom n270 based).When I log in, network manager shows that networking is disabled and I can't connect. Checking/unchecking the checkbox does nothing. All settings in Yast are OK.To make it work, run "/etc/init.d/network restart" and then plug in the wire OR (in case of wireless connection) I restart network from console, unchecck and check the checkbox in networkmanager and only then it starts to work as it should.
Installed opensuse 11.4 and wireless network started automatically. Then I changed the name of the computer in YAST, and restarted. Now I cannot get NM to start automatically at boot. The red X shows up on the panel app Network Management and settings buttons do not activate the wireless device. I have to start NetworkManager from the command line. After about 30 seconds the wireless hardware symbol turns on and then I can connect to the network.
HP Pavilion Dv7 opensuse 11.4 64bit AMD RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02) KDE desktop
I just loaded Suse 11.3 on my laptop. I can't get my wireless network to work. I tried via Yast and then switched back to Network Manager but nothing works.NM says that it is running, however I have no way to access it. No icon and I don't know where it is located or how to add to desktop panel.
I've been running CentOS on my laptop for a few weeks now. I don't know what happened today, but when I boot up, the NetworkManager wont show up on the panel, and I don't have access to wireless networks or Internet. I tried booting my Windows partition and the wireless works fine. I can't seem to remember any latest change I've made aside from the wallpaper =) Any ideas where I should start debugging? I could see the module "iwl3945" still loaded. Here's a manual type of my lsmod | grep iwl3945
The card is recognized by System--admin--network as the correct card (BCM43XG) and assigned eth1. However, NetworkManager shows no wireless network. I have a great signal on the same machine if I boot into a Windows partition.
I'm on F14 and can't seem to get NetworkManager to behave. I seem to remember being able to start my machine and see my static address configured right after boot. For some reason, that's no longer the case. When I finish a boot, I'm not getting any address until I log in. I've tried editing the ifcfg-eth0 both by hand and by the system-config-network. I've played with the "Available to all users" checkbox on both the nm config applet as well as the system-config-network gui. I can't seem to get it to behave predictably and give me my static without having to be in a gnome session.
Here's my ifcfg-eth0 from /etc/sysconfig/network-scripts
How can I enable the network with Networkmanager WIHTOUT logging in in OpenSuse 11.2? If I define a connection for ethernet the System connection is greyed out. I want to use Networkmanager because I have also wireless connections...
