CentOS 5 Networking :: Just Installed CenOS 5.4 On An Older GATEWAY?
Feb 3, 2010
The install actually seemed to go pretty smoothlyIt's a dell pentium4 with 128mbyes it installed textuallyI start the gui with 'startx'but the question I have is for the more experienced CentOS people.when I login as rootI am trying to figure out how to get my machine onto the internet.I had figured the OS would have NO problem with a Linksys 10/100 pci cardsince the OS has the latest drivers and all.The system reports the NIC as a "ADMtek NC100 ethernet" card (eth0)it also reports that the status is "ok"Now, I've seen the NIC when it's plugged into a hub (during the O/S install)and it DOES make the hub's light flicker when it tries to "talk" to it.but when I have it plugged into my Cable Modem (for internet) it's not doing anything.
During the install I SAW the NIC making the hub lights flicker... so I know the interface WAS doing "something".but nowwhen I go into the gui and I try the NetWork Admin , and I try to "activate" the card.Nothing.Am I NOT doing something that I SHOULD be doing?fconfig? (at the command line?) ifup? I would have thought I'd "activate" it with the gui ok...I'll keep poking around.I'm just a little surprised is all. Ubuntu 8.1 had no problem "discovering" and using a wireless Linksys cardTHIS operating system is even newer
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Mar 22, 2010
Recently my motherboard went out, I replaced it and booted centos 5. All went well except sound, video tuners and netoworking. The sound I re-configured, and have gotten tuners working but I am running into trouble with the new network card. The networking setup is;
DSL wireless router/modem IP 192.168.0.1 connected to XP computer through WIFI IP 192.168.0.3. all set to subnetmask 255.255.255.0 and with DNS servers 192.168.0.1 and 205.171.3.25 the XP computer is the only one that supports my wifi card. On wired LAN I share that connection to 4 devices. 3/4 work well, my cent os 5 box will not connect. here are the lan settings:
win xp: IP 192.168.0.60 255.255.255.0
mac 8.6: IP 192.168.0.34 255.255.255.0
blueray: IP 192.168.0.65 255.255.255.0
[code]....
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Apr 12, 2010
I have a requirement of switch between wireless network with a single wireless device. First it should be switched to adhoc mode and then after sometime switch to infrastructure mode to establish internet connection. Everything works fine except the gateway settings.
I have used:
system("route add default gw x.x.x.x dev wlan0") to set the gateway, where x.x.x.x is gatewayip address.
I have used this whenever switching happens in addition to ifconfig command to set the ip address and netmask. But this is not setting the gateway ip address. How to set gateway IP address?
System details below
OS :CentoS 5.3
Kernel :2.6.18
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Apr 28, 2009
And I'm currently working on a new CentOS 5 install I've made on a computer I've got.. So I'm now trying to get that computer to reach my home network through one of my other computers, which have got XP installed. I've configured the XP computer to act as a gateway from one network card to another, and It works with another XP pc, but no luck with my CentOS 5. I used this link [URL] And I configured the correct network card.
So.. the IP of the XP machine is 192.168.1.70, which I have set as a static. So that the CentOS will find it. And I've connected the (fully working) network cable correctly.
What do I have to do?
I have configured the CentOS to recieve an IP dynamically. (dhcp).. Might that be the problem? (well.. one of the problems.. I've tried to set it to static.. ...?)
Is there more to it than this? I mean when I'm working on communication through an XP machine... ?
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Jan 12, 2011
My company hosts five Servers with CentOS 5 installed in a Data Center. The Data Center assigns a VLAN to each customer so that they can organize customers and also count traffic. The VLAN assigned to my company is in the form 62.103.X.X with a subnet mask 255.255.255.240 so the IPs that we can use in our Servers are 13. The first IP in the VLAN (for example 62.103.1.1) is the Gateway and the rest, that are calculated from the subnet mask, are assigned to servers(62.103.1.2 up to 62.103.1.14).
The problem I have is that we have run out of IPs in our VLAN. We have used all IPs and we want some more. The Data Center can assign new IPs but not grow our VLAN IPs by expanding the subnet mask. So they gave us a new VLAN with some IPs (for example 62.104.X.X with a subnet mask 255.255.255.192) They told me that I had to use as gateway the gateway of the first VLAN 62.103.1.1 and assign the new IPs as usual. So I assigned to one of the CentOS 5 servers the IP 62.104.1.2 and set the gateway to 62.103.1.1. Unfortunately this did not work and we could not establish connectivity to the Internet.Is it possible to assign a gateway outside of the IPs that are in the subnet? Could it be a problem with the VLAN setup by the Data Center?
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Jul 2, 2010
I posted it on another forum, but could not get response,So I have this cenOS, Ubuntu and windows operating system running on virtual machines.Now I gave them manual ip address, both ubuntu and windows machines can ping the default gateway, but not the CentOS.It should forward 0.0.0.0. to my cisco router address(192.168.5.254),
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Jan 13, 2010
I have an HP BL460c G5 with 5.3 installed fresh
it can ping its own IP address just fine
its a bit slow but constant pinging the switch its connected to
and i get alot of Destination host unreachables(a few do get through) when pinging the gateway
port on the switch is hardcoded to GB/full. and the server itself reads that its connecting at GB/full.
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Dec 19, 2010
I could not able to configure the default gateway ip address onto the system. i use the route command (" route add default gw 192.xxx.xxx.xxx eth0 ") to add a default gateway onto the routing table but it is "disappear" in the routing table when i had restart the service network.
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Jan 19, 2010
I am trying to get the wireless enabled in my laptop. Following is the dmesg log I get:
ipw2200: Intel(R) PRO/Wireless 2200/2915 Network Driver, 1.2.2kmprq
ipw2200: Copyright(c) 2003-2006 Intel Corporation
ipw2200: Detected Intel PRO/Wireless 2200BG Network Connection
[code]....
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Apr 6, 2010
How to configure yum in centos.
its easily possible in rhel 5.0
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Mar 4, 2011
I need to setup two ethernets in my Centos box. OK no problem both ethernet and 1 virtual works perfect. eth0, eth1 and eth1:0. I'm trying to set up diferent routes for eth0 and eth1/eth1:0 I need eth0 has a 192.168.1.1 gateway and eth1/eth1:0 192.168.1.100 gateway.I think I've tried almost every thing but always get one gateway for all the eth.These are my config..
/sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:XX:XX:XX:XX:XX
inet addr:192.168.1.168 Bcast:192.168.1.255 Mask:255.255.255.0[code]......
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Jan 4, 2011
I have HandBrake 0.9.4 installed from Slackbuilds.org, but a new version came out yesterday that I want to install, but it isn't up on slackbuilds yet. Can I install it from source without doing anything to the old install?
When I installed it from slackbuilds, the slackbuild script also installed all the external multimedia libraries that I need. If I use removepkg (or whatever the command is) to remove the old HandBrake before installing the new one, will that also remove the multimedia packages that were installed along with handbrake? They were all built into the same .tgz
On my work computer so I can't do anything with it right now anyway, so maybe a slackbuild will be up when I get home.
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Dec 7, 2010
I have installed CentOS 5.5 but i have no Internet what could i do so it is working ?
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Jun 16, 2009
I have a CentOS 5.3 box with three network interfaces in it. Each interface is attached to a separate VLAN and I want traffic to stay on each network segment.What I can�t figure out is why I cannot get each interface to have its own gateway and everything gets sent through the default gateway.The basically takes my possible 3Gb total bandwidth and throws it down a single 1Gb pipe.Then on top of that, if I take down the interface (ifdown) that has the current default gateway,I loose contact to the other two interfaces.When I look at the routes, each one of the interfaces shows the gw as 0.0.0.0 and defers to the default route. So I delete the route and try to add a new route with:
[root@testsan ~]# ip route add 10.1.15.0/24 via 10.1.15.1 dev eth2
but end up with the error:
RTNETLINK answers: Network is unreachable
[root@testsan sysconfig]# cat network
NETWORKING=yes
NETWORKING_IPV6=no[code].....
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Oct 12, 2009
I have 2 older 32 bit programs that I have to run in Centos 64bit. I have seen that in Centos-64-bit there are both 64-bit libraries than 32-bit These programs seems to work properly but is it necessary to do anything else?
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Jul 28, 2009
i am sort of a n00b at *nix, and i wanted to install KSB26 on my centos 5.3 install.I downloaded the file. and extracted it.I modified the install.sh in the file to point to /usr/src/kernels/.I run the installation, but it shows many errors telling me to run make oldconfig and make prepare on the src.I run that but i still get the same error and installtion does not occur.Do i need any special packages installed?
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Jan 26, 2010
I've been trying to delete all files older than 7 days in a directory temp1.I have try different ways but nothing happend:
find /temp1/* -mtime +7 -exec rm rf
find . -mtime +7 -exec rm rf
find /temp1/* -mtime +7 -print -exec rm{}
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Feb 6, 2010
I'm using Ubuntu 9.10's GRUB. Now i wish to exchange it with CentOS-5.4's GRUB I didn't install GRUB during CentOS installation. Searched through Google and CentOS wiki find all about rescuing GRUB.
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May 23, 2010
I've been using Linux for about 2 years now, mostly Ubuntu & derivatives, but I've also tried Fedora, Mandriva, and others. I wanted to give CentOS a try because I'm very interested in going for a Linux+ or similar certification, and so I'm looking to start learning how to configure & maintain Linux servers and so on. I have a friend who's a Linux sysadmin, and he recommended CentOS as a good learning tool.
Anyway, I've only got a wireless connection in my office at home (the actual cable modem is downstairs) so I intentionally chose a wireless adapter that would work with Linux -- it has a Realtek RLT8187 chip, for which there is support built into the kernel, or so I've read. It has worked out of the box in just about every distro I've tried, and indeed it worked OOTB when I tried out the CentOS 5.5 live CD.
However, when I actually installed the CentOS to my hard drive it no longer worked -- I have only a greyed out option for a wired connection (presumably since my motherboard has an ethernet adapter, but there is no connection). Why the wireless would work in the live session but not after install? Is there a firmware file or something I need to track down? I did look on this page, but it doesn't mention anything about RTL8187.
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Jan 21, 2010
I just ran "yum update" to download the latest kernel from the repository, and noticed that it's 2.6.18-164.11.1 while the latest on www.kernel.org is 2.6.32.4.Out of curiosity, why is there such a discripency between the two? Lack of resources to test and build binaries?
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Jul 20, 2010
Ive got the Remi repo all setup along with yum priorities. I know how I would go about installing PHP 5.3 but for Drupal 6.x version 5.2.x is more compatible. I see php 5.2.13 in the remi repo archives. How should I go about installing it? just wget the rpm and install?
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Mar 16, 2011
My machine is:
Intel Celeron, 2000 MHz (20 x 100), 400MHz FSB, s478 Northwood core with 128 KB L2 Cache
768 MB RAM: 3 * 256 MB PC133 SDRAM (3.0-3-3-6 @ 133 MHz), DRAM:FSB running as 4:3
Intel Havre D845HV (3 PCI, 1 AGP, 3 SDR DIMM, Audio) (latest BIOS, HV84510A.86A.0050.P15.0305252001)
Western Digital 60GB hard disc, WDC WD600BB-75CAA0
SONY DVD-ROM DDU1612, and some generic floppy
[code]....
all in all this was a pretty good machine to run Windows XP SP3, MS office 2000 (or 2003), and some mozilla-based browser (Firefox can work OK, but with "K-Meleon 1.5.4" it's fast as lighting). It has enough horsepower to run CounterStrike at 1024*768 and play MiHD movies with just a few ocasional glitches. Plays DVDs or XVID and MP3s without any problems, and they don't seem to use much resources in Task Manager. Sound, graphics and network subsystem work very good, but this will always be a PC133 SDRAM system hence memory bandwidth problems, and not much can be done about that. Machine was used as office + internet box, with some Winamp music playing in the background and as such it was great.
Now I turned it into (dual boot) CentOS 5.4 development server for developing a nonprofit PHP site.Joomla-based contents load slower from this machine on the intranet then on the regular server online. It's not crazy slow (like pentium 1 @ 166 mhz) but it's definitelly not good either. I think it should be able to run much much better, especially when I remember the Athlon T-bird at 1 GhZ with 512 MB PC100 RAM used to be much more responsive while running web apps on Mandrake 9 (when it came out) with KDE WM, while this cellery runs just server in init 3 (no Xorg or Gnome, just command prompt).
Please advise me how could I enhance the speed of the system. CentOS 5.4 was installed with all settings on default. Everything worked plug'n'play, didn't need to install anything extra. Machine primarily runs Apache2 with PHP and MySQL, SSH and SFTP daemons, not much else I guess. No GUI, mostly it runs headless anyway. I'm mostly annoyed by the way it serves pages, it's like it takes up to 6 seconds to precache some complex PHP page and then poof! whole page appears at once. I'd much rather if it served the contents of the page part by part, gradually filling in the details. I'm not sure if (and how) that can be achieved though. I'd like to optimize servers (mostly Apache) and maybe net config to run smoother and faster.
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Aug 9, 2011
I have a CentOS running. It is important to have my CentOS available when I am remotely connected to a VPN router. I tried to add a default gateway to the VPN router, but after reboot it goes away. How can i put this as permanent?
ip route add 192.168.2.3 via 10.0.0.1 dev eth0
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Dec 21, 2009
if anyone of you have shifted using Paid Red Hat Linux with CentOS, and what are your experiences of moving from Paid Linux to Unpaid Linux CenOS. When do you suggest a person use Paid Linux and when to use Unpaid Linux?
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May 26, 2010
I've set a two-node cluster using Pacemaker/OpenAIS. I have only one network and if I break this one, the communication between node is interrupted ... With a ClusterIP resource, when network is breaked, then each node start the ClusterIP => 2 same IP .. Is there a way to define the prefered location of a resource when connection between these nodes is broken ?
A <==> B
If one of the node lose the network, then follow a previously written rule : start resource on A (for example). B will know than it's not the prefered node and so, will stop to serve. Possible ? This is because if both node are connected, but a problem between these node occur and client can join both node ... then the split brain is problematic ... A better solution is to add a rule when the split-brain occurs : all node wich can't reach the gateway have to stop all resources ... And so, if it's A wich lose the network, service will start on B and only B without any problem ...
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Jul 11, 2011
I am trying to get a Linux (Slackware 13.37) working in a Windows networking environment. The IT support for this organisation does not extend to Linux support, so I'm limited in what help I can get for this.
I'm trying to get to the point where I can get to the internet to download what I need on this Linux machine.
The situation is this (*fictitious addresses used) -My Linux machine uses a fixed IP address (10.100.150.21)
My Windows machine uses a DHCP assigned IP address (10.100.150.213)Both Linux and Windows machine are configured to access the gateway server (10.100.150.1)So, I can ping the Linux machine from the Windows machine and vice-versa.I can ping the gateway machine from the Windows machine.I can browse Windows Shares on the network via SMB from the Linux machine.I CANNOT ping the gateway machine from the Linux machine with the Destination Host Unreachable message being the error message.
For actual internet access I need to access a proxy server but since the Linux machine can't even ping the gateway server, it fails to ping the proxy.Now, I have been told the gateway is a HW based router and for Windows machine they use some software for authentication to connect to the network. This software isn't available for Linux, so that's why I've been told to use a fixed IP address.My experience of networking is pretty basic and most of the Linux setup is done via running Slackware's setup program.
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Feb 28, 2009
I'm trying to find ssh logs from up to 6 months ago. I can only access the /var/log/secure* logs up until the beginning of this month. Any way to find the older ones? Do they get archived somewhere else?
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Jul 8, 2010
I have been out of the linux game for a few years and decided to get back into it, I've been working now for a few days on figuring out why my machine's network card does not seem to want to work on a new FC13 installation.The machine is an older Dell Dimension with an 2.53 Gig Celeron Processor, 512 Megs of RAM (A gig soon) and the ethernet card is an Intel Corporation 82562EZ. Sone generic thing, though FC13 does recognize and appears to have appropriate software.
ifconfig shows no IP address in the x.x.x.x sense, and restarting the network doesn't seem to do anything. The network card is in working order, I tested it in a winxp installation, and the cable is also functioning.
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Oct 14, 2010
Is there a way to check older iptable rules that were loaded? I accidentally overwrote my iptables and that has killed internet access to all computers in the intranet. I must have accidentally deleted some line in the iptable rules and cannot figure how to get it back to how it was. I am using Debian 5.05 by the way.
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Aug 2, 2009
I have a server with 192.1.9.10 ip address and I want to define two gateways with ip: 192.1.9.4 and 192.1.9.254 on it but I don't know how I can do it. I don't have professional information in linux.
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