CentOS 5 Networking :: Numerous Hostnames On Numerous Interfaces?
Aug 13, 2010
I'm curious; for a current project a server has 4 network interfaces (eth0 and eth2 are in a bonded pair using the bonding module, and then eth1 is being used for management, while eth3 is currently unused but may be utilized for iscsi in the future).
We need to configure two different hostnames, one for the bonded pair (bond0) and one for eth1. Now I have been googling around to try and figure out how the heck this is done but I can't find much of anything. In some methods it mentions using the hostname command, however this isn't persistant after reboot.
Another mentions just editing the /etc/hosts file but I thought that was only used locally? Both bond0 and eth1 will be on separate VLANs with different DNS servers, so it needs to end up with two different FQDN's
I'm trying to get wireless working in F10. Using pci wireless card with Atheros chipset. To be sure, I tested this hardware with a PCLinuxOS Live CD. Connects to AP perfectly.
Hardware drivers seem all OK in F10, and ifconfig shows wlan0 as expected. When I use the Wireless-Assistant 0.5.7 there's no connection.
Actually, the AP logs show numerous connections and disconnections.
Preferring CLI, I'm using a drop-dead simple wpa_supplicant.conf as follows :
Should Ipost some debugging output from wpa_supplicant -Dwext -c/etc/wpa_supplicant/wpa_supplicant.conf -iwlan0 -d
I have ran the regular apt-get update && apt-get dist-upgrade and it pulls in newer versions of the liquorix kernel pretty often. Now whenever I boot up my system, I notice that there are now about three different 2.6.36.dmz liquorix kernels installed (I can't remember the exact numberings on that).
How can I remove all versions of the liquorix kernel except for the latest?
I boosted the FSB of my CPU by 10%, the system is very stable. But CPU-G & the task-bar applets in Ubuntu don't recognize it. They show the current MHz as the standard freq, not the freq +10% (ie 3520 vs 3200).
It isn't a big problem, just curious why and if there is a fix. The only program I can find that works is CPU-Z in Windows 7.
I just preupgraded from Fedora 14 to 15 on my Toshiba NB205 netbook (the preupgrade went smoothly by the way).
Immediately upon logging in, I discovered catastrophically poor quality of font rendering in every terminal window program I tried, (and I checked plenty like LilyTerm, Sakura, gnome-terminal, etc) and in web-browsers.
The symptoms are the same for all applications: the glyphs are very thin, anorectic, and very ugly.
The described behavior is desktop independent: same in Gnome (3 and the fallback mode), fluxbox, Openbox.
I have a large number of scanned JPG images that I would like to convert into a single PDF file -- each image will be on its own page, and I want the pages to be in a certain order.What is the command for ImageMagick to take a batch of JPGs and convert them to PDF, and order the pages in a certain way.
(by the way: I am working on writing a Gentoo ebuild for convert2pdf at the moment, but until I get that worked out, I'd like to figure out how to do this using Imagemagick, which is already in the portage tree, and already installed)
I'm getting numerous Gnome errors after logging in... Previously everything was working fine; perhaps a software update messed things up? I have looked around for potential solutions, but none that I have tried have made any difference. The errors I get are: The panel encountered a problem while loading:
[code].....
how I can fix this? This is Ubuntu 9.10 PowrePC installed on a PowerBook G4 -- I'd really love to be able to see the battery level remaining (and seeing the time would be nice, too ).
I have made numerous audio CD's with Brasero, but recently I had to make one and mid way through the burning process I am given this error: Could not decode stream. Or some variation like that. It ruins the cd and after I get the error I can not eject the disc.
I recently tried Fedora on my laptop (previously Debian; I was bored one day) and gnome-disk-utility (palimpsest) warned me that my hard drive had numerous bad sectors. I re-installed Debian to find that this software was installed before so why had it not warned me?
When I load the disk utility, it says SMART is not available. I've got smartmontools installed, I can run a self-test with smartctl but I don't think this shows bad sectors. I've tried starting smartd on startup but the disk utility never changes from "SMART is not available". It is possible for it to work with this hardware as it works in Fedora on this laptop; any ideas?
I have two eth interfaces bridged in CentOS, one of these interface is connected to a Windows Server, I can do a ifconfig down on both these interfaces and there is no change of status at the windows side, I don't get the message that 'network cable has been unplugged'
Is this behavior normal ? I think when you shut an interface than you get the interface down message at other end ? And what becomes the status of the bridge if I shutdown one of its interface ?
I have a series of four config scripts which all run in sequence of each other.first occurs during the whole kcikstart thing.Kickstart then tells rc.local to run step2, which then tells rc.local to run step 3. No steps are repeated, after they are run they delete themselves from rc.local.After each step, it reboots.Step 3 is responsible for creating the /etc/sysconfig/network-scripts/ifcfg-eth1 file, and populating it. It greps ifconfig -a for the mac address of USB0.
#! /bin/bash
# Check to see if the usb nic takes eth2, if it does, move it to eth1[code]............
I have 4 NICs and am trying to create 2 bonds. The first bond is mode 1, the second is mode 4. What happens though is makes both bonds mode 1. Here's my modeprobe.conf:
alias bond0 bonding options bond0 miimon=80 mode=1 alias bond1 bonding options bond1 miimon=100 mode=4 lacp_rate=1
I have a weird issue that I have not seen on any forum. My jaunty on DELL studio laptop seems connected to net, but I can not access any network service (ssh, firefox etc.). But when I connect a cable the cable lights blink as it should be and in wireless connection my wifi light blinks.
It was working 2 days ago without problem, and I have not done big changes recently.I removed and reinstalled network-manager and network-manager-gnome. Nothing changed. I see a message in each restart as follows (when Openafs is starting). I can reproduce it with "/etc/init.d/openafs-client restart"
Code:
ADVISEADDR:error in specifying interfaces: no existing ip interfaces found
which file can setup up my network interfaces? i was able to setup the nameserver using /etc/resolv.conf but I cannot find anywhere to configure the ip and and gateway. I could't find /etc/network/interfaces as you do on Debian
Now that IPv6 is becoming more and more common, I found the need to disable IPv6 on some interfaces but have it enabled on other. I found that /proc/sys/net/ipv6/conf/*/disable_ipv6 does exactly that. I am now wondering if anybody knows, why are networking scripts so counterintuitive. /etc/sysconfig/network has an option:
NETWORKING_IPV6=yes
All this option does is disable some ipv6 services (dhcpv6...), it does not disable IPv6 in whole (as one would assume...that's why you had to disable it with module parameters). Searching for more IP6 related config option, one can find that /etc/sysconfig/network-scripts/ifcfg-* scripts can contain:
IPV6INIT=yes
Again, this option does not disable IPv6 protocol on the interface, it just skips running ifup-ipv6/ifdown-ipv6 scripts. I added a /sbin/ifup-pre-local. Now, this script runs before ethX entries are created (other scripts run when it's already too late) in /proc directory, so it modifies default values which are then used after those entries are created:
I have 3 Interfaces for a different LAN's and when I start one interface the another interfaces goes down.How can it's possible?I configure my ethernets as:
I have a rack of IBM x335s. They are all running 802.1Q over 802.3ad, that is VLAN trunking over two physical Ethernet bonded with LACP. Its been working fine on all of the servers for years.One server recently had its hard drives upgraded and CentOS reinstalled. It is a minimal install. The server has been reconfigured exactly as it was and has been verified and compared against the other working servers.It will not enslave the interfaces on boot. You can manually enslave and then bring up the network, so that much of the configuration is verified. It simply refuses to enslave... which fails everything that comes after thatHere is a snippet of the message log on the machine that does not enslave on boot
Jan 31 22:28:57 vm3srvp01 kernel: NET: Registered protocol family 10 Jan 31 22:28:57 vm3srvp01 kernel: lo: Disabled Privacy Extensions Jan 31 22:28:57 vm3srvp01 kernel: IPv6 over IPv4 tunneling driver
If I try to add a new interface (eth1) to /etc/network/interfaces, I get
Code: * Reconfiguring network interfaces... SIOCSIFADDR: No such device eth1: ERROR while getting interface flags: No such device SIOCSIFNETMASK: No such device
[Code]...
How do I add 2 interfaces and get anyone of them to work, as available ?
I cannot ping any hostnames on our LAN /etc/resolv.conf has both name servers configured correctly. I can ping the IP, but can't ping the hostname. I know it's something really simple, just can't put my finger on it.
Every time I do a fresh install, there are a number of manual config things to change. One of them is to modify /etc/hosts to add the local IP addresses to a computer name.Can this be done via the Ubuntu networking somehow ? It would be nice not to have to change some of these config files.
I have a ubuntu server running which acts as a firewall/dhcp router for sharing internet to all computers on the network. On the network i have my stationary computer (win7) and my laptop (macbook).The server has 3 nics installed.ETH2 for internet. ETH1 (192.168.1.2) for windows pc. ETH0 for macbook (192.168.2.2).I can share files no problems over the network. Between windows <-> server, macbook <-> server, windows <-> macbook.The problem i'm experiencing is that i can't seem to find either hostnames between windows and macbook. They connect to each other fine with the right ip addresses, but they can't seem to connect when using computer names.
On both the macbook and windows pc i can see the server and connect to it without using the ip adress.What can i do to make them see each other with their computer names? Is there anything i can install on the server and configure in order for it to work automatically?In osx you have a tab in the finder that says "shared" which shows the computers on the network and only my server pops up.The same in windows, i can only see the server but not the macbook.As said, it works perfectly fine if i use \192.168.2.2 (or smb://192.168.1.2 on the macbook) but i'd rather be able to connect via the computer names.Would also love if they could resolve automatically so when a friend connects to the network i'll see his computer name right from the start, without any re-configuration.
I am wondering if it is possible to use avahi to resolve hostnames across a gateway. With gateway I mean a linux box with ip_forward'ing enabled to pass traffic between interfaces. The gateway connects two networks with all hosts running Ubuntu and specifically avahi-daemon. The gateway is not running avahi and I am not able to install it there. The firewall configuration on the gateway is not blocking any traffic between the networks. I am able to send UDP packets from a host on one network to a host on the other.
When I run tcpdump on a host and try to ping that host.local from a machine on the other network I see no traffic. This means that the gateway is not passing the multicast traffic along. Is there any special setup required on the gateway to allow this?
(although I'm running Solaris, I've posted here as I expect Solaris/LINUX is irrelevant) - more of a general network Q.I have a PC running Solaris 10 (hostname MARKUNIX) and a laptop running WinXP (hostname MARK-LAPTOP). Both are connected to broadband via a router. IP addresses for each are determined via DHCP (192.168.1.nn) and I do not leave either on, 24x7. I am running Oracle on MARKUNIX and want to be able to refer to it by hostname when using Oracle tools on my laptop.Each machine can ping each other ok by ip address and curiously the Solaris PC can ping MARK-LAPTOP (I'm not sure how it resolves that?) - importantly the laptop cannot ping MARKUNIX.Now I could add MARKUNIX to my laptops hosts file but that would mean changing the file each time I boot up as the ip address for MARKUNIX will keep changing (DHCP).
Is there a way to refer to MARKUNIX without having to keep changing ip addresses and use DHCP? As I understand it the 192.168 address is private and is not really the 'real' ip address and as such can be manipulated(fixed?) even whilst using DHCP?Am I right in thinking that a static ip from my broadband supplier is the ip of my connection (router) and I'll still have the same private network referencing issues?What I've covered above pretty much is the extent of my knowledge of networking so bear that in mind please.
I recently set up an Ubuntu server computer (10.04) with the hostname 'morbo', and with a static IP address. With all my other ubuntu systems i can ping and ssh using their host names, like:
[code]...
i can't reach it via 'morbo.local' nor can i reach my other ubuntu systems from morbo by their hostnames. I have seen a 'quick and dirty' solution which might help here : [URL]... , but i don't want to have to add every system to morbo's list and morbo to every systems list, and because it works without manual configuration on all my other systems, i don't see why it shouldn't be possible here. Currently everything connects to one d-link router - does this mean it is the DNS server?
we use for the installation of our machines bladelogic. We have different servers. Some servers have only one network interface, but it can be 2, 4 or may be more. There is always one network device for using PXE, but it is not always eth0.Is there any way to run kickstart without the entering of the PXE-Device so, that kickstart checks all the network devices in the system?
I am working behind an ISA Server proxy in a windows network. I have an Ubuntu 10.04 without have it added to windows active directory domain.I have configured Ubuntu network proxy, and everything works fine ..but:I can't ping, host, nslookup & most important I can't wget (wget: unable to resolve host address) from the terminal. I have read lots of forums and I tried to resolve the issue but I failed.Also before I had in the same network Ubuntu 9.04 (in another pc) and wget was working fine.
I'm on an embedded system that doesn't have Gnome, and I'm trying to startup networking automatically using /etc/network/interfaces. Here's what I have.
[Code]....
eth0 comes up just fine. wlan0 comes up, but it's unable to acquire a DHCP address. I added the following lines to /etc/rc.local, and wlan0 comes up all the way, but I'm not too crazy about this hack.
