CentOS 5 Networking :: Internet Sites Not Working In FF Browser / CentOS
Jul 20, 2011
I installed CentOS. NetworkManager successfully installed and launched. I can ping any IP from terminal but I can't open any site in browser except 127.0.0.1 I can't open IP of the modem 192.168.1.1 in browser also.
The results of some commands:
ifconfig
eth0Link encap: EthernetHWaddr 7D:60:00:00:00:00
inet addr: 192.168.1.5Bcast: 192.168.1.255Mask:255.255.255.0
inet6 addr: fe80::7f60:ff:fe00:0/64Scope:Link
[Code]....
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Sep 10, 2009
My server was working perfectly.
My other uses on on LAN can access Internet but Cant ping the server.
Though they were able to do that earlier.
No software installed. No change in any files.
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Jun 9, 2011
I am fairly new on CentOS and am in the process of setting up a small home office network that shares Internet access through the Linux (CentOS) box.I have two network interface cards The Linux box is also the DHCP server. My challenge is to get the client machines to access the Internet! I have a PPP connection to the ISP. Essentially I followed these Instructions CENTOS REDHAT Internet Connection Sharing. Pretty straight forward but I am still not able to get clients to access the Internet. I defined the DNS server through DHCP (196.44.x.y). I assumed it has to do with default gateway and it is set as follows: on the Linx box the gateway is my ppp0 link. DHCP uses eth1 (LAN card) fixed IP as the gateway. All clients are reflecting this information. The firewall (iptables) is reflecting the FORWARDING and POSTROUTING rules as advised.
Is there a step I mioght have missed to get this working? I tried to Google but its not getting me far.
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Jan 4, 2011
I am setting up a Beowulf Cluster using CentOS 5.5. I have the head node with two NIC devices eth0 and eth1. eth0 is the one that is connected to the WAN while eth1 provides the internal LAN connection. I am trying to configure internet connection sharing with the slave nodes on the network so that I can update/install software as needed via ssh sessions using yum. I have set up the master node with the requisite changes to iptables to enable IPv4 forwarding. From my slave nodes I can ping ip address from the terminal, but my domain name resolution is not working. i.e. if I ping [URL] it can not resolve, but if I ping 74.125.224.50 (one of google's IP's) I can communicate with the machine without a problem. I also ran the configuration tool provided in the README section of the forum on the slave node and the master node. The links are:
[URL]
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Sep 9, 2009
I have an MSI K9A2 Platinum mobo, which has a 10/100/1000 Fast Ethernet Realtek 8111B built-in, a D-Link DIR-655 Router and a DSL modem. Compared to Windows Visya and other Linux distros ( Fedora 11, Suse 11.1, Mandriva 2009.1 ) access to the internet is much slower. It seems there is a noticeable delay when running CentOS 5.3. before internet access kicks in each time I am surfing the web or updating my system.
Is there any way I can speed things up, or determine why CentOS 5.3 seems much slower ?
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Apr 21, 2010
I installed CentOS on Vmware server 2.0.2
I took a snapshot of my machine with internet working
If I reboot my machine I lose internet. This makes no sense to me.
I ifconfig eth0 down then ifconfig eth0 up and still no internet
Weird thing
I check ifconfig and my bcast ID is 192.168.2.255 when it is supposed to be 192.168.45.255
(When the internet is working if I check ifconfig the bcast ID is 192.168.2.255)
IF I change my bcast my internet stops working
If I reboot my machine my internet stops working
I checked /etc/sysconfig/network-scripts/ifcfg-eth0 and I see that in my snapshot (where the internet is actually working) the bcast is at 192.168.2.255
Without rebooting if I edit that script and I put it to .45.255 my internet stops working
If I reboot my machine at any time my internet stops working
I have also just realized that I cannot ping my gateway..
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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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Apr 13, 2009
I installed CentOS 5.3 on my Shuttle SS-31T with SiS 190 network adapter. While booting the message "Bringing up eth 0 [ OK ]" appears. After booting it isn't possible to surf to an internet location (p.a. www.google.com). It's also impossible to ping other machines in the network. After typing ifconfig everything seems to be ok.
ipv6 is turned off
IP : 192.168.0.3
Subnet : 255.255.255.0
Gateway : 192.168.0.1
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Nov 20, 2010
I have a Centos 5 server on my LAN for testing the websites that i develop.It worked perfectly until this morning , after cold start -up, it seems that my network card is not enabled . Everything works normal:gui and terminal but no internet access. I'll run some commands on my Linux box and write the results , by hand , to this forum .
* uname -r : Linux Server 2.6.18-194.26.1.el5 i686 i386
* ifconfig eht0 : eth0 : error fetching interface information
* ifconfig -a : I get only results for loopback (lo)
* less /etc/modprobe.conf : alias eth0 sis900
* lspci |grep -i eth : 00:04.0 Ethernet controller :Silicon Integrated Systems [SiS] sis900 PCI Fast Ethernet (rev 90)
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May 10, 2011
I originally tried using a torrent download to try and get a DVD ISO image. When I tried to copy the image to a DVD, my software said something about the file not being supported and the file vanished from the download location.
So now I have tried looking for just an ISO file instead of a torrent file and when I try to download it my browser just hangs, I get the "Save" or "Open" option and choose "Save", nothing happens. The option window blanks out.
So how do I download a DVD ISO image for CentOS 5?
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Dec 9, 2009
I am trying to install CentOS-DS on version 5.4 x86_64. I cannot get to the Extras repo due to lack of wired Internet access. I have wireless (except to server) and I have big UFD drives.
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Apr 20, 2010
Is there any way to setup the Centos Directory Server without an internet connection?? i tried using the command: yum install centos-ds
but this just tries to connect to the internet to to download the packages. Is there a site where i can find the package so that i can copy it to my server and install it or is there some other way to do this?
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Jan 22, 2011
I am using Ubuntu 10.04, when connected to the ethernet through , Atheros Communications AR8152 v1.1.I can successfully access the internet. But when I try to use the wireless I can connect to the network using Atheros Communications AR9285, but can't access any internet sites. Or ping any other devices on the network.I'm using an Acer Aspire One D260
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Oct 17, 2010
I have CentOS5.5, it has full access to internet until I did something to it I couldn't figure out. This is not a cable issue since I could ping and ssh to other machines within my lan. Apache is also running fine, which is probably irrelevant. When I type traceroute cnn, it simply hangs, later saying [URL]:
Temporary failure in name resolution
Cannot handle "host" cmdline arg '[URL]' on position 1 (argc 1)
This is a desktop version of CentOS5.5, when i do Administration - Network, it says eth0 is active and Primary and Secondary DNS are set correctly to my comcast DNS server at 68.94.15x.1
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Mar 10, 2009
I have a 4.7 VPS web server on the net and it works very well. I am intending to upgrade it to Centos 5.x and have been having a play using VMWare Appliances and VMWare Player. I have therefore installed a local 4.7 applicance (all works well) and a 5.2 appliance (can't get basic internet connectivity).
I am running VMWare in Vista (apologies) and am connecting via a broadband modem (which effectively presents a serial modem to the computer via a USB interface). Using VMWare I am hooking this up to either the 4.7 appliance (works fine) or the 5.2 appliance (detects fine and connects but there is a problem). I think the issue with 5.2 is a firewall or a routing issue
I have prepared a report of the most common things people would need to know. The 5.2 appliance can see the USB device (lsusb), connects fine and obtains an IP and DNS addresses (wvdial) but ping fails. However the same on the 4.7 appliance works fine - I can use yum, ping and lynx etc. I have turned off the firewall on both appliances, but something is still getting in the way in 5.2!
***********************************
CENTOS 5.2 - ROUTING ISSUES?
***********************************
* Have disabled the firewall using system-config-security-level
> lsusb
lsusb
Bus 001 Device 007: ID 0fce:d0c5 Sony Ericsson Mobile Communications AB
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Feb 27, 2010
I have a CentOS server that I can connect to over my local network. The computer I'm currently on is on that same network and can access the internet. My server can not connect to the internet. The network card is obviously connecting to the network since I can access the server locally with SSH or HTTP. While in the terminal for the server, I type wget google.com and the server can not find the specified host, so this leaves me to believe it can not access the internet.
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Jan 30, 2010
I have a CentOS server in one of my labs at work that does not have an Internet connection.Is there anyway that I can download the updates on a USB stick and then update the server? If so, what are the procedures?
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Oct 29, 2010
I've installed a new fresh Centos 5.5 ..and after a lot of work..something starts to work (X now works with the new ATI HD5145 using ATI drivers) but i've a serious problemThe ethernet controller JMC250 JMicron PCI EXPR. doesent work at all so my notebook is out of the world !!!Here is some infos:rpm -q centos-release
centos-release-5-5.el5.centos
rpm -qa kernel* | sort
kernel-devel-2.6.18-194.el5
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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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May 8, 2011
How can I successfully SSH using SecureCRT from the Internet to my Centos Linux box at home behind the router? I have a DGL-4500 dLink router. I configured a Virtual Server in the router for SSH 192.168.0.182 Protocol 6 TCP public port 22 ? private port 22 Schedule Always Allow Inbound Filter Allow All. Further I Enable DMZ for 192.168.0.182. I got my Internet IP address through "what is my ip website." Now every time when I try to SSH, I get a message "The remote system refused the connection". Here is iptables -L command output;
[root@localhost ~]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere
Chain FORWARD (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere
[Code]....
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Mar 14, 2009
I just downloaded and installed the latest Cent OS 5. I disabled SE linux, turned off the firewall, and selected the Server package options when installing. I plan on using this as a router/firewall between my internal network and the internet, as well as web server, etc. The first thing I did was to configure the two NICs, internal one with 192.168.7.1 address and the other with an address from my ISP (I have a static address, but I also tried to let the DSL router assign an address via DHCP). Everything looked fine, I checked /etc/resolv.conf and my routes. I was able to ping the DSL router from the server, but I was not able to do a ping or lookup on anything outside my network. I tried host, dig, nslookup, etc, no luck. Obviously then, I was not able to browse the net with firefox.
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Oct 6, 2009
I am a newcommer to Centos. I should connect to internet via a pptp vpn connection. I created the connection in "network connections". In other distrows I could connect to created pptp vpn connection simply by clicking on network-manager-applet and selecting the connection, but there is no network-manager-applet in Centos. Is there any way to connect to the vpn connection I created or I should go to do it by manually editing config files?
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Oct 15, 2009
Any ideas why i cant connect to the internet with this server.
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Jul 4, 2010
On my Centos 5 box my internet won't work. I am unable to get update and I can't download any native programs. But I have Samba running and I am able to access all my files for my other computers.
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Nov 28, 2010
1. I've just installed Centos 5.5 on a dell machine with 2 network interfaces, and have disabled SELinux.
The output for the command sestatus is: SELinux status: disabled
2. Am I right to think that iptables is not a concern since SELinux is disabled? In any case, the output for the command "iptables -L" is:
Chain INPUT (policy ACCEPT)
target prot opt source destination
ACCEPT udp -- anywhere anywhere udp dpt:domain
ACCEPT tcp -- anywhere anywhere tcp dpt:domain
[Code]....
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Jan 1, 2011
This is my first post on forums.i am using centos 5.5 on my pc. i want to use internet on my using my cellphone as modem.internet is running successfuly on my handset.i have got a usb cable to connect it with pc.details are given below:-
1.cellphone= samsung c3200(gprs,edge,3g supporting)
2.connection method= usb cable
3.os= centos 5.5
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Dec 3, 2009
i am trying to get centos 5.4 installed and bootable on my 16gb flash drive, with persistent overlay using and ext3 formatted drive.i want to be able to boot into centos and be able to have all updates from yum, etc, saved when shutting down for my situation i cannot use vfat.
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Nov 16, 2010
DM9, 2GB RAM, 32GB SSD, Ubuntu 10.04 UNR.At Panera and at my local library there is a page that comes up when I try to connect to the Internet that is an agreement page. It comes up with my iPod Touch and with my MacBook. Using my DM9 that page does not come up for me to sign in so I can't get on the Internet.I have had Firefox and Chromium running at different times with the same results. When there is a WEP password or no password it connects. What do I need to do to get connected to the Internet at Panera and the like?
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Feb 13, 2011
I see something like internet connection is established. Ive established etho connection but I cant open any sites at all. I also have Windows on another hard disk and it works well. About a week ago I had Ubuntu 8.04 and it worked really fine. What�s wrong? Is there any remedy?
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Aug 5, 2009
A few days ago my wireless windows vista computer internet was running slow so i reset the modem. Then I went on the internet on my ubuntu machine machine and went to www.google.com and couldn't connect to the server so i tried linuxquestions and i couldn't connect but i could ping sites. My wired and wireless windows computers worked fine. So I called Comcast (my ISP) and said it was a router issue. So I looked online and it said to disable IPv6 on firefox so I did but that still didn't work.
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