CentOS 5 Networking :: Getting Start W/ Centos Networking \ Ssh Commands But Not Setting Up A System And Stuff?
Feb 19, 2010
I just started setting up a linux box in the office...I have some experience with ssh commands but not setting up a linux system and stuff.The box is connected to our network but I have no clue how to make windows & osx talk with it. How can I go by doing that and also setting up an apache server to be able to connect through network. Right now I have apache/linux/mysql running it works when i go to localhost, but I would also like to let all the computers in office to access it. I would guess that will deal with virtual host which I know how to setup. I just need to setup an IP.
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Nov 4, 2010
i'm trying to set up samba so that i can connect to the printer in the den since we have wireless access. also, i can see my virtual box on the windows xp home ed desktop, but can't access it.so, how do i go about setting up samba so stuff is visible between my ubuntu machine and my families windows orientated network? i'm having a hard time finding anything on videos too. i'm taking a break from the remastersys stuff so i can get the more important things done, such as connecting my ubuntu machine to my families windows network. i don't know if the printer is wireless or not, but regardless, i can't find it.
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Nov 14, 2009
I'm trying to seup my dual ethernet card. One to go to the internet and the other to serve the LAN. Do I need a router for the NIC that will serving the LAN and another one to the NIC that will be connected to the internet? I don't want the LAN computers to connect to the internet. Can someone please give me a description on how to set this connection. And yes I will be using my server as a DHCP and DNS BIND.
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Mar 18, 2010
I am configuring a new installation of CentOS 5.4 with the goal of setting up a server. Ive been through the installation and set up everything that I thought that I had to setup. Im getting into CentOS because my work utilizes this distribution. I do have some debian experience, and I have used Ubuntu on both server and desktop platforms.
Now, when setting up Ubuntu, I found that I was able to get networking up much easier. During the initial installation it had asked me to choose between DHCP or manual configuration. As this is going to be a server I want it setup with a static IP. But for some reason no matter what I do I can not get the machine connected. I go so far as trying to do a 'yum update' and I can not make a connection.
A few things Ive noticed that might be applicable here . . . . .
For DNS servers, I am unsure exactly what I need to put here. My ISP is Cox. I am not sure what NS's to put there for them, so I thought that I would be able to use third party DNS servers such as OpenDNS or the Google Public DNS. I know that I have setup my debian server like that with no issues. Also when setting up my debian server it prepopulated certain areas that I am required to fill when setting up CentOS. Example, when setting up localhost.localdomain -- I would choose my hostname and local domain was prepopulated as ph.cox.net. I dont know if this is something that I have to use, or if it would change if I am using third party DNS.
My resolv.conf file looks like this
search ph.cox.net
nameserver (IP address of third party dns either opendns or google)
nameserver (IP address of third party dns either opendns or google)
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Oct 24, 2009
I am trying to learn about networking and am looking to set up a mini network between three bare bones Centos machines in Virtualbox. I set up the machines with a static IP. In the Virtualbox I am using NAT and have the IPs as follows
Centos-1
IP: 10.0.2.15
Gateway: 10.0.2.2
DNS: 10.0.2.3
Centos-2
IP: 10.0.2.16
Gateway: 10.0.2.2
DNS: 10.0.2.3
Centos-3
IP: 10.0.2.17
Gateway: 10.0.2.2
DNS: 10.0.2.3
On all machines i can ping google.com, and yum updates, but I can not ping any other machine. It says they are unreachable. NOt really sure what to do. Any help would be much appreciated.
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Apr 27, 2009
I'm setting up a LDAP server to centralize the admin of a bunch of Centos 5.2 servers. I've got the LDAP server set up. I've got my client machines reading their autofs mount tables from LDAP. Now, I'd like to get name resolution working via LDAP.
Here's what I have so far:
1) /etc/nsswitch.conf contains the line "hosts: files dns ldap"
2) /etc/openldap/ldap.conf has URI and NSS_BASE_HOSTS set up to indicate root of "hosts" subtree in LDAP database.
3) "hosts" node in database is an "orginizationalUnit" object.
4) Below "hosts" I have a number of "ipHost" nodes defined with "cn" set to host name and "ipHostNumber" set to host's IP address
This setup doesn't work. Attempting to ping a host by name locks up. If I take the "ldap" keyword off of the "hosts:" entry in the nsswitch.conf file, the ping then returns immediately with "unknown host".
I'm surprised that there isn't better information available online on how to do this. I've found bits and pieces, but nothing concise. how to get name resolution working through LDAP?
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Jul 22, 2009
how to setup a broadband connection in Centos5.. My broadband connection is over a PPPoE link
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Sep 19, 2010
I'm trying to follow the instructions here to get my dell wireless NIC working in CentOS. I've got to step 3 but when I run the make command.But it does exist, as a link pointing to ../../../usr/src/kernels/2.6.18-194.el5-i686.
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Mar 28, 2009
I am trying to install CentOS 5.2 on an HP rp5700 desktop unit. These units were originally sold as a Point of Sales unit I believe, but HP also markets it as a high life cycle server for SMB market.I tried to load CentOS on this unit via CD (created from downloaded ISO of course). It presents the initial CentOS banner page and waits for the obligatory "enter" to continue. It begins the boot process up to discovering the PCI stuff and just locks up, no response. I have to power down to restart.Since this does not even get to the point of installing. I am at a loss what to do next. Has anyone had a similar issue with other PCs.The boot stops at the lineACPI: PCI Root Bridge [PCI0] (0000:00)
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Aug 4, 2009
I have a Sprint U760 air card that apparently works under Linux. Sprint has a guide: "Wireless Mobile Broadband Setup Guide for Linux OS" that I am using to setup the air card. When I go through the procedure in the manual for "Setting Up PPP Using KPPP" the last task is to query the modem to see if Linux recognizes it. When I do the query I get a response "unable to open modem". I have tried going back through the PPP setup but still get the same response.
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Jul 7, 2010
i have encounter strange situation i have set all my network configuration via /etc/sysconfig/network-scripts/ifcfg-eth0 ,eth0.2 ,eth1 etc ....i have used only once Gnome network manage settings to add routing since then all my network config change although all files mention above showing the same config i have set initially and same for Gnome network Manager.
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Sep 11, 2010
I recently purchased the Linksys WMP45G wireless card for my desktop (as my router is too far for ethernet cable). I can't get it to work. The NetworkManager icon doesn't appear in the upper-right corner, despite being up-and-running. Here is some output:
[root@cwatson ~]$ uname -a
Linux cwatson.homeunix.net 2.6.18-194.11.1.el5.centos.plus #1 SMP Wed Aug 11 08:19:38 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
[root@cwatson ~]$ yum list installed "Network*"
[code]....
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Oct 12, 2009
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
iwl3945 90177 0
mac80211 137929 1 iwl3945
cfg80211 30793 2 iwl3945,mac80211
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Apr 13, 2010
I have a Centos 5.4 server, I would like to know how to start NFS automtically when the server boots up so that I won't have to manually start the service after the server boots up. where and how do I accomplish this?
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Jun 29, 2010
I have installed CentOS 5.5 final on VM ware 7.0 workstation.... and I was trying to install and configure bind9.. it installed alright but it refused to start because named.conf is not in the /etc/ directory. I have copied the template for /usr/share/doc/named/* to (/etc/ and /var/named/) the appropriate directory but it still fails but on it does not gives me any error message. Oh... least I forgot I was trying to configure it as a cache only server for now.
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Jan 18, 2011
I set up a bridge device but I can not figure out how to pass parameters into the ifcfg-vmbr0 in particular I need to pass:
maxage
ageing
fd and stp seems to be passed by DELAY=0 and STP=on the others? I have not found anything in the post, tips, docs how could I do?
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May 9, 2009
I have CentOS 5.2 just installed and massively updated with yum -update command. Than I tried to configure firewall. After changes via system_config_securitylevel_tui (open ssh, http, ftp, and 3306:TCP ports) iptables service can't start with message
> /sbin/service iptables start
Flushing firewall rules: [OK]
Setting chains to policy ACCEPT: mangle filter nat [OK]
Unloading iptables modules: [OK]
Applying iptables firewall rules: iptables-restore v1.3.5: Couldn't load match `TCP':/lib64/iptables/libipt_TCP.so: cannot open shared object file: No such file or directory
Error occurred at line: 18
Try `iptables-restore -h' or 'iptables-restore --help' for more information.
[FAILED]
I erased the iptables service and installed it again with yum. How can I make this service work?
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Jul 23, 2009
I have Centos 5 installed on a PC in the local network. I have installed the RPM dhcpv6-client-1.0.10-16.el5.i386.rpm on this PC to configure it as DHCP V6 client. The RPM was installed successfully, and I have done modifications to the following files:
1. /etc/sysconfig/network, set the networking to yes.
2. /etc/sysconfig/network-scripts/ifcfg-eth1 set the BOOTPROTO=DHCP.
Now the problem is when I start the client on this pc as dhclient, it throws the following errors, and logs out after some time. All the network configurations were lost and the PC gets disconnected from the network.
[root@ServerB]# dhclient
Internet Systems Consortium DHCP Client V3.0.5-RedHat
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
[Code]...
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May 28, 2009
I am trying to attach my server to 2 diferent networks, with fixed ip addresses,
eth0 = 192.168.0.2 255.255.255.0 with gateway 192.168.0.1. This is currently working, and I can ssh o the machine on this address
eth1 = 192.168.150.5 255.255.255.0 with gateway 192.168.150.1
When I try and start eth1 with ifconfig eth1 up, I get the error message "eth1: unknown interface: no such device"
I have configured eth1 using system-config-network-tui and /etc/sysconfig/networking/devices/ifcfg-eth1 looks correct
GATEWAY=192.168.150.1
TYPE=Ethernet
DEVICE=eth1
BOOTPROTO=none
[Code].....
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Mar 19, 2011
system: centos 5.5 Kernel 2.6.18-194.el5 freshly installed. bind is configured in chroot environment out of the box. placed named.conf in /var/named/chroot/etc and my zone files in /var/named/chroot/var/named.
[Code]...
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Jan 18, 2009
I'm having trouble to get connected to the internet on CentOS 5.2 . I have an NVIDIA nForce Networking Controller onboard. And I've been trying to find a driver for this, but I was unsuccesful so far. And if I have a driver, how do I install it? Could anyone please help me to get this working. I'm just a beginner with CentOS and Linux, so I don't have much experience yet. Oh, and I forget to say that Centos 5.2 on VMware does have internet, but I stopped using vmware because it became very laggy on my Vista OS, so I started to use dualboot.
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Aug 12, 2009
I have a problem when a try start my wireless card broadcon 4303, i receive this message.
SIOCSIFFLAGS - no such directory
I use centos 5.2
kernel 2.6.18
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Nov 24, 2010
I recently configure a centos linux distro to use on the internet.my actual plan is to use it as a router to the internet for computers on my network. the system already has two lan cards which i have configured with their appropriate ip addresses. now with this initial configuration i believe i should be able to browse the internet, but my problem now is that i cant even though the lan card pointing to isp is correctly configured with the ips,gateway and dns from my isp. i cant even do a ping to the outside world.
I cant really pin point where the issue is coming from but i am guessing maybe my route are not well configured. i get ''unknown host google.com" message when i ping google.com and a ping to my gateway address gives '' Network is unreachable". i have been using this system before as my gateway, but only recently switched isp and i started having this issue when i reconfigure the system to my new isp settings. Now, on a windows system, all goes fine so i have been able to safely remove the fact that maybe it is from my isp from the picture. How do i resolve this?
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Jul 13, 2010
I have LDAP server but I'm not admin. When I type: ldapsearch -x -b "ou=2007,o=faculty" "cn=7username"
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Aug 13, 2010
My problem is next: I have Public IP-addresses (ex. 80.237.x.x) and this IP-addresses join to network interfaces (eth0:0, ... eth0:5) and I have local IP-address of Guest System 192.168.122.111 of NETWORK 192.168.122.0.What I can do here if I want assign Public IP-address for Guest System? Because if I want connect to my Guest System through any computer in world (ex. through SSH) I should have public IP of guest system (not private, ex.192.168.122.111).
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Dec 22, 2010
I have a virtual machine with two network interfaces. Now I wanted that both are part of different domains and tried to configure that with system-config-network. But there I only could change the the domain for the entire system. Is it possbile to edit the Domain for each network interface. If yes how?
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Sep 6, 2010
I trying to set up a LDAP server using openLDAP / db4. The server runs fine but I cannot get the client to work. Client and server are on the same machine, as for now. The problem seems to be in PAM. However I cannot start the system-config-authentication tool which should do the trick.
Environment
=========
CentOS release 5.4 (Final)
Software
======
authconfig-gtk-5.3.21-6.el5
system-config-securitylevel-tui-1.6.29.1-2.1.el5
system-config-network-tui-1.3.99.18-1.el5
[Code]....
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Apr 2, 2011
I have install squid 2.6 in my cent os 5 system. The proxy server is working perfect using the following method.
Code:
[root@localhost squid-2.6.STATBLE22]# ./configure@--prefix=/usr/local/squid
I want to enable delay pools feature in it.For that purpose I do as following
Code:
[root@localhost squid-2.6.STATBLE22]# ./configure --enable-delay-pools && "configuration successful"
The question is should I configure it as I do it for squid
./configure --enable-delay-pools--prefix=/usr/local/squid
To enable delay pools may I need the correction in the steps which I have taken.
[root@localhost squid-2.6.STATBLE22]#make
[root@localhost squid-2.6.STATBLE22]# make install
In short to enable delay pools may I just use
# ./configure --enable-delay-pools
then
#make
#make install
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Jan 12, 2010
New CentOS 5.4 system working fine. Sys admins came in and copied the hosts file from one of the servers down to my desktop and ever sincethen machine has been slow (progs take 10-20seconds to load). RunningGnome. Luckily I saved the old hosts file and copied it back and all is now well. But I'd like to understand why, particularly as I will need to change myhostname in the future.
As configured:
/etc/hosts (yes my hostname is "dummyName" that I will need to change later)
127.0.0.1 dummyName localhost.localdomain localhost
[code]....
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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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