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

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CentOS 5 Networking :: Internet Working But Can't Ping?

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

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I ifconfig eth0 down then ifconfig eth0 up and still no internet

Weird thing

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IF I change my bcast my internet stops working

If I reboot my machine my internet stops working

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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

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ipv6 is turned off
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Subnet : 255.255.255.0
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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 .

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May 10, 2011

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***********************************
CENTOS 5.2 - ROUTING ISSUES?
***********************************
* Have disabled the firewall using system-config-security-level
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centos-release-5-5.el5.centos
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[Code]....

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[Code]....

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