CentOS 5 Networking :: Centos OS 64 - Development VM Image With Static Ip Address?

May 23, 2011

I am a developer, not a network admin - sorry if this ia dumb question. I need to test an application on CentOS 55 64 bit. The instalation went fine and initially I let DHCP work its magic. The router IP address ia 192.168.0.1 and all other VM's I have are granted dynamic ip address on this range (i.e. 192.168.0.x). However, the CentOS vm got an IP address that looks like it belongs on a different subnet :192.168.1.1

The VM (vmware desktop) network setting for this VM uses "Bridged: Connected directly to the physical network". I can ping the host (Windows 7 64 bit) and the host can ping it (it been the VM) - but no other computer on the network can see it. To make things easier, I changed the network configuration to use a static IP address. Here are my configuration files:

/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
HWADDR=00:0C:29:83:4B:A4
ONBOOT=yes
TYPE=Ethernet

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CentOS 5 Server :: Trying To Assign Static IP Address

May 1, 2010

i am trying to assign a Static IP address and for the life of my i cannot get it to work Can someone explain to me the easiest way to do it and if i restart the server it won't get lost either.

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CentOS 5 Networking :: CentOS 5 BCM4315 WPA-PSK DHCP Won't Obtain IP Address

Nov 7, 2010

I am having a problem getting a wireless network connection on my DELL laptop running CentOS 5. I have no problem getting a wireless connection when the laptop is booted in Windows XP. I also don't have a problem when booted under CentOS 5 and there is no authentication setup on the wireless router. I only have a problem when I setup authentication. The router wireless log shows the PC connectinng, authenticating, and succeeding authentication.I am using the Broadcom Hybrid-wl wireless driver.

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CentOS 5 Server :: Centos And Xen: Lan Error - Vif0.0: Received Packet With Own Address The Source Address

Jun 18, 2010

I installed the Centos 5.5 and after the Xen. After I put a virtual machine named VM01.Initially it worked properly, I tried everything and it worked.When rebooted, I had problems with the network.I have two network cards eth0 and eth1, but eth1 does not have any ip and I use only eth0.The error that appears is:

vif0.0: received packet with own address the source address

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CentOS 5 :: Best Web Development Application That Runs On Centos KDE?

Sep 8, 2010

What is the best web development application that runs on Centos KDE?Close to Dreamweaver in capabilities.

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Ubuntu Networking :: Static IP Address And The Install Configures For A DHCP Configured Address - Network Not Starting

Dec 16, 2010

Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.

So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.

My files are as follows:

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CentOS 5 Networking :: Static Ip - No Network Connectivity

Oct 27, 2009

I'm having strange difficulties in setting a static ip for my CentOS 5.4 installation. If I use DHCP everything is fine, but with a static ip I have no network connectivity. I have done this many times with RedHat/Fedora/Ubuntu etc. with no problems and now I have no idea what I'm missing or doing wrong. I have tried to set ip as 192.168.1.20 (anything below .100 will do). GW is 192.168.1.1 and NM is 255.255.255.0. This is all I have had to use with other distros, but now when I set these I cannot even access my routers admin page or ping it (192.168.1.1). (I just did this with Vista on my other machine and all worked fine).

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CentOS 5 Networking :: Hostname Changes Automatically On A Server With Static IP?

Jan 7, 2009

Server has been moved to a different locations and so the IP has been changed now the hostname is changed to something other that what it was before.

Could it be the rDNS that is causing this?

Note: this is not a DHCP connection.

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CentOS 5 Networking :: Static Configuration For Wireless Card ?

Apr 28, 2009

I have a desktop PC with CentOS 5 installed, and a wireless card that's working well via NetworkManager.

How would I configure the wireless card statically, e. g. by editing /etc/sysconfig/network-scripts/ifcfg-wlan0?

This would be something like :

DEVICE=wlan0
BOOTPROTO=static
ONBOOT=yes
IPADDR=192.168.1.252
NETMASK=255.255.255.0
ESSID=my_essid
CHANNEL=3

But I don't know how to define the WEP key here.

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CentOS 5 Networking :: Converting From Static Ip Network To DHCP

Apr 19, 2010

I decided to take the plunge and change the existing static ip configuration for my home network to a dynamic (DHCP) configuration. The DHCP server in this new network config is my gt701-wg actiontec DSL modem.

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CentOS 5 Networking :: DHCP Work But Not Able To Setup Static IP?

May 26, 2010

I am having several boxex with centos on it. No pb. I have recently setup a new box with centos 5.4 and I am not able to get the network working on it when configuring a static ip.I've configured eth0 and dns using "setup": unsuccessfulI've used the network config GUI: unsuccessfulAnd it is working very well when I let the dhcp getting the setting.I need a static IP.Here is the getinfo output when static ip setup, and below it, the getinfo for dhcp setting

== BEGIN uname -rmi ==
2.6.18-194.3.1.el5 i686 i386
== END uname -rmi ==

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CentOS 5 Networking :: Spontaneous Static IP To DHCP Switch?

Jan 7, 2011

I had something I think if very odd happen to one of my computers at work today, it appears to have spontaneously switched from having a static address set to getting its address by dhcp.this is a small office with a mix of mostly linux servers and desktops with a few stand alone windows computers, mostly notebooks. Most of the desktop computers get their address by dhcp, they all have NIS /NFS for remote mounted home directories (interchangeable desktops so anyone can log in at any desk). The particular desktop computer in question here has a shared printer on its parallel port, so has a static IP. Yesterday a UPS in the server rack died, after pulling it and plugging things back in and restarting the servers, it was easiest just to reboot all the desktops, everything came up ok including the desktop in question, and the printer did work.

Today I pulled the oversized UPS from this desktop to replace the dead one, and put a more appropriately sized one in its place, shut the servers down again, rebooted, etc,About an hour later someone tells me the printer is not working on the desktop, and after a lot of searching I find this desktop has the wrong IP address, I ran system-config-network and it showed the address was set to dhcp, I changed this back to the correct static IP and things seem to be working ok now.

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Networking :: Static IP Address That Has A Reverse Lookup To "myipaddress.static.lyse.net" And Not Email Domain?

Apr 26, 2010

I got this message on Friday from just one domain. uote:mailsrv.forthnet.gr #<mailsrv.forthnet.gr #5.5.0 smtp; 554 5.5.0 Your message was considered to be spam by the FORTHnet Antispamming Policy and was not delivered to the recipient. The following spam tests returned positive for this message:FORGED_RCVD_HELO,RCVD_IN_BRBL. For further information visitWe are not a spamming community but it seems we have a statice IP address that has a Reverse lookup to "myipaddress.static.lyse.net" and not my email domain. Would setting a cname mail.mydomain.no -> myipaddress.static.lyse.net cure this problem or are there more tricks to be performedOnce I have cured the FORGED_RCVD_HELO I can move to getting the IP removed from BARACUDA.

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Networking :: Centos Cannot Ping Hosts On The Same Subnet After Change To Static Ip

Jul 26, 2011

I am using centOS 5.0. After I change from DHCP to static IP address, I cannot ping hosts on the same subnet. The error message says destination host unreachable. Before I made the changes I was able to ping and now even I change it back to DHCP I still cannot ping with the same destination host unreachable message. The centOS is running on VMware on a Windows host.

ifconfig shows

eth0 Link encap:Ethernet HWaddr 00:0C29:A1:9A:10
inet addr: 192.168.0.202 Bcast:192.168.0.255 Mask: 255.255.255.0
inet6 addr ......

After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows ? (192.168.0.106) at <incomplete> on eth0 I tried different ways by disabling the firewall and and disabling SE protection. No Luck.

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CentOS 5 Networking :: Bind A Static IP To My NIC I Loose All Network Connectivity?

May 26, 2009

I am having a problem with when I bind a static IP to my NIC I loose all network connectivity but, if i leave it set to dhcp it works fine. I've gone over all my settings a thousand times and they are all correct. Has anyone else had this problem or give me a hint as to what the problem might be?

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CentOS 5 Networking :: Network Install / Static Changes To Dhcp In Anaconda

May 10, 2010

I'm trying to install CentOS 5.4 from my local repo, booting the server from centos54-netinstall iso (vmware). I write "linux URL..." during boot. I eventually get prompted for network config, where I choose manual configuration. Hitting OK ignores my config and defaults back to dhcp, which won't work since I don't have any dhcp server available.Whats wrong? Is there a bug in anaconda?

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CentOS 5 Networking :: Multiple Static ISP IP Addresses / Servers Configuration

Mar 31, 2011

I have a CentOS5 server with dual ethernet adapters + Webmin installed as my Router / Firewall / DHCP server working successfully with 1 static IP from my ISP. I also have 7 additional static IP addresses from my ISP needing to configure to individual servers inside my network. I have configured the additional virtual interfaces, but am lost on how to route data specifically from additional ISP address to specific internal network address.

Below is my desired configuration.
98.173.159.xx1 = eth0 physical interface ==> eth1 192.168.1.1
98.173.159.xx2 = eth0:1 virtual interface ==> 192.168.1.10 ==> CentOS Server 2
98.173.159.xx3 = eth0:2 virtual interface ==> 192.168.1.20 ==> CentOS Server 3
98.173.159.xx4 = eth0:3 virtual interface ==> 192.168.1.30 ==> CentOS Server 4
98.173.159.xx5 = eth0:4 virtual interface ==> 192.168.1.40 ==> Mac OS X Server 1
98.173.159.xx6 = eth0:5 virtual interface ==> 192.168.1.50 ==> Mac OS X Server 1
98.173.159.xx7 = eth0:6 virtual interface ==> 192.168.1.60 ==> Network Attached Storage Server 1
98.173.159.xx8 = eth0:7 virtual interface ==> 192.168.1.70 ==> Windows 2008 Server 1

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CentOS 5 Networking :: Rt61 PCI Wireless: Freeze Upon Shutdown With Static IP Configuration

Jun 24, 2009

I have one desktop PC I'd like to use as a jukebox. It's installed in the basement as a black box, with only SSH access, and it has got a minimal CentOS 5.3 install with MPD and NCMPC. It's connected to the hi-fi in the basement, so I can stream music to it when I'm downstairs. Since I didn't want to use cables everywhere, I bought a PCI wireless card, with a RT2561 chip.

Until recently this card worked OK with Linux. Recent kernel version even have out-of-the-box support for it, except of course you still have to download the firmware from the Ralinktech website.

I gave the thing a static IP configuration by editing /etc/sysconfig/network-scripts/ifcfg-wlan0, interface went up fine, I can ping the machine and SSH into it OK. Now the only problem is, when I do a shutdown -h now, the machine "hangs" while trying to bring wlan0 down. (In case you wonder: I temporarily attached a monitor to it, since wanting to know what goes on while shutting down in an SSH session is a chicken-and-egg situation :)). I actually have to hard-reboot it (by pressing RESET).

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CentOS 5 Networking :: Virtual Host Entries Are Not Working When Accessed From External Static IP?

Jan 16, 2011

I had made following entries in my httpd.conf file at centos5.5.

###########################
Listen 80
Listen 8080
Listen 8085[code]....

When i am trying to access the any directory other on port *80, its not being accessible from the static ip which is routed through a DMZ server. http://122.165.35.9:8085 something like this returns the error "could not connect to web browser"

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Networking :: Centos 5 Ip Address Not Changed

Feb 17, 2011

i want to change eth0 ip address from 192.168.7.143 to 192.168.7.140, but it not changed even i follow the steps in this tutorial this is content of file /etc/sysconfig/network-scripts/ifcfg-eth0.

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CentOS 5 Networking :: IP Address Conflict Log?

Dec 4, 2009

I was particulary suprised to have nothing in my logs regarding an IP address conflict in Linux compared to the windows and its popup !Did I miss something in the logs ? Or is there someting to configure to have it ?Otherwise can I do something to have the date in the dmesg log file ?Here my story about this problem :My linux machine was monitored by Nagios so i've seen some Up/down/up/down phenomene when I came to work this morning. I tried to figured out what's wrong browsing the logs (messages & dmesg & mail/root)... but nothing usefull so far...Then I hearded that a collegue booted a old Windows machine the day before. I checked this machine and there was the classic windows popup regarding a IP address conflict! So that was the problem, the Windows machine have the same IP than de Linux box.I was particulary suprised to have nothing in my logs regarding an IP address conflict in Linux compared to the windows and its popup !Did I miss something in the logs ? Or is there someting to configure to have it ?Otherwise can I do something to have the date in the dmesg log file ?Linux : CentOS 5.4 64bitsWindows : Windows server 2003 32 bits

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CentOS 5 Networking :: How To Set Gateway IP Address

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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CentOS 5 Networking :: MAC-address Is Changed?

Jun 16, 2011

With virtualbox I do a test session to train myself with centos before I make big mistakes on my production server.I did take a harddiskfile vdi to another computer with virtual box. Now I have the problem that de MAC-address is changed.I can not get the mac adres anymore, becaus those computer is sold. How can i change the trust of the MAC-address in centos? Or must i change de MAC-address? If I may change the MAC-address, i must do that inside centos, end not inside virtualbox, if you understand me?

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CentOS 5 Networking :: Ip Address Not Working / Solution For This?

Oct 25, 2010

The install went fine but the only issues is getting the server on the network.

I can't ping any thing other that the ip address assigned to the server.


I did it through the gui , the command line and using ifconfig and editing the ifconfi-eth0 file and nothing works.

any ideas on how to get this to work.

i see nothing wrong in the messages.log file either.

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CentOS 5 :: Can't Install Development Tools

Jun 28, 2009

I try to install the Development Tools by yum groupinstall 'Development Tools' but there is a problem with the dependency of the package systemtap-runtime.

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CentOS 5 :: Can't Install Development Tools In 5.3

Apr 7, 2010

Trying to install the latest , greatest hplip 3.10.2 on a CentOS 5.3 I'm following hplip webpage manual installation steps have a Kernel ver 2.6.18-128.1.6.el5 output from rpm -q centos-release centos-release-5-3.el5.centos.1 trying with (as root user ) yum -y goupinstall "Development Tools" getting following err message:

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CentOS 5 :: How To Create/boot CentOs 5.3 Ram Image

Apr 6, 2010

How can I create/boot CentOs 5.3 ram image?I'm looking to create a CentOs ram image that once booted will not access the hard drive.

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CentOS 5 Networking :: DGE-530T Will Not Get IP Address From DHCP Server

Aug 6, 2009

I am attempting to get this network card running under CentOS 5.2 but have had no luck. Some sites say to use the sk98lin driver, others the skge, which I can't find at all. I have tried multiple versions of the driver in rpm but none seem to work. The card shows under the network manager but will not get an IP address from the DHCP server.

Here are the outputs for this card.
uname -rmi
2.6.18-92.1.10.el5 x86_64 x86_64
lspci -m
04:01.0 "Ethernet controller" "D-Link System Inc" "DGE-530T Gigabit Ethernet Adapter (rev 11)" -r11 "D-Link System Inc" "DGE-530T Gigabit Ethernet Adapter (rev 11)"
lspci -n | grep "$(/sbin/lspci | awk '/net/ { print $1 }')"
04:01.0 0200: 1186:4b01 (rev 11)
lspci -vv
04:01.0 Ethernet controller: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11) (rev 11)
Subsystem: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11)
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
Latency: 64 (5750ns min, 7750ns max), Cache Line Size: 32 bytes
Interrupt: pin A routed to IRQ 121
Region 0: Memory at febfc000 (32-bit, non-prefetchable) [size=16K]
Region 1: I/O ports at e800 [size=256]
Expansion ROM at e0000000 [disabled] [size=128K]
Capabilities: [48] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
Status: D0 PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [50] Vital Product Data

How to get this working as we have 3 of these cards for computers without a Gb NIC and I don't want to fight with it 3 separate times.

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CentOS 5 Networking :: Eth0 Unavailable - Different MAC Address Expected?

Jul 8, 2010

New to CentOS5.5 I'm experiencing some trouble in order to continue my configuration. I've just installed my vmware tools and configured my network card with system-config-network

Edit eth0 (eth0) - vmxnet3 -> with a static IP I rebooted my server and since then I lost my eth0. I still see it in system-config-network, but I can't active it anymore.:

/etc/init.d/network start Bringing up interface eth0: Device eth0 has different MAC address than expected, ignoring. [FAILED]

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CentOS 5 Networking :: Secondary IP Address Won't Work On Eth0

Jul 1, 2011

Everything worked fine until very recently, and without apparently ANY change to the settings on the server, a secondary IP that was assigned to my server won't work anymore..Any IP attached to the same server works fine.. So in my case, the problematic IP is 213.8.155.67. The other IP (213.8.155.42) works without any problem.How would I go about troubleshooting this?

ifconfig:
eth0 Link encap:Ethernet HWaddr 00:26:B9:44:11:3A
inet addr:213.8.155.33 Bcast:213.8.155.127 Mask:255.255.255.128
inet6 addr: fe80::226:b9ff:fe44:113a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

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