Networking :: Can't Get To Internet With My Centos System / Resolve This?
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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Jun 10, 2011
I have installed Linux 5.6 in my home PC, i tired to use internet connection its failed to connect. Whereas i am able to work in windows XP.
In Linux:-
i am not able to ping any sites.
i am using BSNL Broadband connection.
i have enable the option DHCP (IN DNS Configuration) to obtain an IP automatically from the ISP.
/etc/resolv.conf file looks like
search localhost
nameserver 192.168.1.1
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Nov 4, 2010
I've replaced Ubuntu 10.10 with F13 and can't connect to the Internet.
I'm using a WiFi connection to my router. I receive an IP address via DHCP. I can connect to the router's web configuration interface, 192.168.2.1. Same with my NAS web configuration interface.
I've also tried with Live CD (F13 and F14beta). Same thing: receive IP, connect to router's web interface, can't connect to Google.
As a check, I tried Ubuntu Live CD and I can connect to the Internet.
I've also tried F13 Live CD on my laptop. Can't connect to the Internet.
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Oct 31, 2010
Cannot connect to internet via Firefox or Midori on my Dell Inspiron 8200 laptop with a Netgear wireless card. However, I can update via yum, I can ping google from the CLI, I can ssh to my desktop, I can point a browser to find my router which /etc/resolv.conf points to, but can't get a browser to resolve hostname. I'm posting from a different machine (desktop), here is my /etc/resolv.conf:
[Code]....
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Apr 23, 2010
The computer connects wirelessly to a router. The router is connected to the internet and that is working well. (If i use a cable connection to the router, I can reach the internet).
Why wont the wireless connection reach the Internet? It is a strong connection. It worked before wirelessly. I am on 10.04 beta, with the recent updates installed.
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Nov 17, 2010
I have an odd thing going on with DNS. I have two machine's running Ubuntu and for some reason they do not always resolved internet addresses on my Internet connection. This has gone on since the Ubuntu 8.04 when I first started using Ubuntu. Anyway, I use OpenDNS' DNS servers and I have been running perfectly.
This is what is odd. My Windows XP Machine never has the problem. It always resolves. Does Windows Possibly have some Microsoft hosted DNS server hard coded in there as a backup? Things are working fine this way so I am not looking to change. I am just a little puzzled and finally got around to asking, "Why is this".
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May 31, 2009
cant resolve anything via dns, can ping ips though, traceroute shows that traffic is going through.
[root@home ~]# uname -a
Linux home 2.6.18-128.1.10.el5 #1 SMP Thu May 7 10:35:59 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
[root@home ~]# route -n[code].....
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Oct 2, 2010
I has used centos for all my servers but today i have problem with my router.
I install and configure my router/gateway as follows code...
at previous configuration (centos 4x) everything work well with those configuration but when i use centos 5.4
all my client cannot browse the Internet, its only work when i put the ISP dns (221.321.32.15)
i want my client use 192.168.0.1 as DNS.
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Feb 26, 2010
It is really a problem that drives me crazy.
Every time after restarting my Linux machine, Network won't load and i can't activate eth0.
After multiple restarts it comes activated but i am sure it is not what makes it to work.
Can some one ever heard about such situation?
I have a 3com Ethernet adapter.
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Apr 9, 2009
Ive seen this a hundred times while searching google but I can't seem to get any of the fixes suggested to work for me.
Here are the specs code...
I have other servers on the same network with the same software/hardware that never loses its mount to the windows share, and nightly backups are run through those mounts. So why does the mount on this machine fail when we do a push? The only conclusion that I can come to is there is some sort of time out on the windows server that causes this. The other servers that have this same type mount use their share every night, where as the share on this server gets used once or twice a week. Once the mount hangs I can not unmount it, I have to reboot the server. Once the server is rebooted the push works fine. But then the next week when a push is tried it hangs. What else can I check?
UPDATE: I've also tried NFS mounts and autofs mounts and they hang as well
I enabled logging by echo 1 > cifsFYI and this is what I see in var/log/message code...
Ive removed the actual file names for security concerns. Any one have ideas as to why this is happening? The only other thing I can think of to try is to swap out the NIC but it's at a remote location so I can't do that right now.
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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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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 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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May 29, 2009
I am working on a system with no internet access so I cant use yum. How do I install a feature like X-Windows or GNOME Desktop Environment(using groupinstall) directly from DVD?
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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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May 23, 2010
This is a bit of an odd problem that's been happening to me recently. My home folder is a version of Fedora old, I've been using the same one between Fedora 11 and 12 (which I'm now using).
When booting up, I notice that my system fonts are not the ones I have manually set. They're the ugly version, whatever exact font it is. It's only when I select System->Appearances from the menu that the system seems to detect my seletions to use Liberation fonts in all areas, and then everything instantly switches to the more visually pleasing Liberation fonts. This is a strange bug, I was wondering if anyone has experienced this or can point me in the right direction?
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Sep 6, 2010
Just i installed Slackware linux , how can i connect this system to Internet? I have BSNL broadband (DSL modem conn to ethernet port)
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Nov 5, 2010
I have Internet modem , and i want to share my internet to other , i mean other can connect to my internet from other computer ? with key security? , its possible? its possible from windows should linux do that too , but i dont know how .
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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
[Code]....
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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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Apr 4, 2010
Just recently installed Opensuse 11.2 in a KDE environment. The problem I am facing is that when I connect it to my network either via wired or wirless neither getting internet or access to the network although the network manager shows the connection as active
I am using a Dlink Di-524 Wireless Router at home
The Wirless router for the computer is Broadcom BCM 4312
Was able to install the drivers for this from the packman repository
Also when I connect my laptop directly to the internet connection via wired it is working fine. However if i connect it to my wireless router either over wifi or thru wired it just shows connected but i can neither access internet or other computers on the network.
Have checked the wireless router other computers (windows and ubuntu are being able to access the internet via it)
Results of my ifconfig-a command when i am connected over my wirless connection code...
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Dec 4, 2010
I've installed ubuntu on my laptop, but I've got one problem... I can't see my wireless Internet?
On my mac I see my wireless Internet i click on it, put the password in and I'm connected, but on my ubuntu he doesn't show the wireless Internet?
When i connect via cable I've got Internet so i think it can't be my network card because else he wouldn't connect via cable not?
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Jun 23, 2011
Dell atitude E6420. e1000e: Intel(R) PRO/1000 Network Driver - 1.0.2-k2 Firstly, I installed 11.04, 64 bit, I have wired internet but can not restart; then I switched to 10.04 LTS 64 bit, I can restart but I lost my wired internet. For both situation, wireless internet works well. I update the "linux-image-generic-lts-backport-maverick", then the wired internet works, it is fine. But, I can not restart the system, just same as 11.04. How to fix it?
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Mar 28, 2010
Failed to fetch [URL] Could not connect to 127.0.0.1:8118 (127.0.0.1). - connect (111 Connection refused)----when tor and polipo are not running---
Possible causes:
I just installed tor, privoxy, and polipo and set them up for web browsing anonymity. Other than that I don't recall making any system wide changes.
Other Info:
I can access the internet via a web browser and other programs just fine because i can manually edit each program's internet connection settings. apt-get works when tor and polipo are running. I have used tor and privoxy/polipo in the past and this has never been a problem, so I must have done something different this go around. Obviously I am not sure what that is. Attached are the applicable config files.
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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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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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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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