Ubuntu Networking :: Unable To Connect To The Internet But Can Connect To The Router
Apr 6, 2011
I am trying to setup a dhcp server for my internal network. I have two NICs, a modem, and a wireless router. I have my server connected directly to my modem which is providing me with Internet access on eth1 and is working fine. I have dhcp and dns setup on eth0 which is connected to my router. The router shows that it is connected to the Internet but when the router gives a client computer an IP address, the client is unable to connect to the Internet but can connect to the router. I will post my configuration files below with my current configuration.
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Dec 5, 2010
I have just installed ubuntu 10.04 using the wubi installer to dual-boot my machine. Under ubuntu, I am not able to connect to the internet or my router. Everything works fine under windows. I have tried to find relevant information in the forums, but nothing seems to work for me. I have tried disabling ipv6, setting a static ip, but no go. ifconfig shows no IP, dhclient results in no DHCP offers and pinging my router's IP results in Network is Unreachable.
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Feb 21, 2011
I am running Slackware -current. Every thing was working fine and suddenly it stopped. I am unable to connect to the router or the internet. Which is a problem since I'm using it right as a server.
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May 23, 2010
I'm a beginner in Ubuntu, I'm using Ubuntu 9.10.
Currently using a Dlink GLB-802c router and using a ADSL connection. I try to connect to the Internet but it is unsuccessful. Ubuntu is not indicating my router when I connect to the PC.
My PC is P4 and using USB to connect to internet, PC haven't a Ethernet interface.
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Jan 3, 2011
- CAN connect to other computers - ssh and vnc over the home network (via D-link 524 router).
- CAN get an IP address via DHCP
- CANNOT get internet connections - including router at 192.168.0.1
- CANNOT even ping router (but I get an IP address - weird)
- Other computers on the network CAN access internet
- Live CD could not access internet
results of ifconfig
Code:
Code:
I am wondering if his ISP could be doing this - he has received a warning letter about bitorrent. Could the isolate a single computer behind a NAT router?
This is the results from dmesg:
Code:
I have tried:
- to set proxy settings as "Direct internet connection"
- disconnecting power to (including 30 sec wait): modem, router, computer + unplugging ethernet from computer
- Live CD (he only had an old one 7.10) which also didn't connect to internet, but as I am remote, I couldn't do any more. We are downloading a 10.04.1 iso for him to burn tomorrow, and will try that again.
- Uninstalled Crashplan which was the last software that we installed (and it was working ok).
I am currently ssh'ing into another computer on the network that IS working, and then ssh'ing into my Dad's computer - including a VNC session (tunneled through both machines and router).
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May 4, 2011
i recently connected this router to mahh modem..http:[url]....before router connection i was able to connect to internet via "pppoeconf command" but now i am not able to connect to internet from ubuntu ..i am still using lan cable coming out or router to connect it with pc..
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Jul 30, 2010
I connect my internet using pppoe to may DSL modem with bridging mode, and it goes fine until I try to put a wireless router between my PC and the modem. After I configure both modem and the router, I can run my wireless network fine by connecting it from a laptop, but my PC is unable to reach the modem at this configuration.
PC has address 192.168.2.100
Router has address 192.168.2.2
Modem has address 192.168.2.1
all with netmask 255.255.255.0
With bridging configuration in modem and automatic detect configuration in the wireless router, the wireless network run well, except the PC cannot ping the Modem saying that
Code:
root@firefly:~# ping 192.168.2.1
PING 192.168.2.1 (192.168.2.1) 56(84) bytes of data.
From 192.168.2.100 icmp_seq=2 Destination Host Unreachable
Looks like my PC, which has Slackware 13.0, don't know how to reach the modem even they are physically connected.
1. how can I configure the modem, PC, and router so that the PC can reach the router? Do I need to do add route gateway from the PC?
2. How can I configure internet connection from the PC (before I use PPPoE)?
3. How can I configure the modem, PC, and router so that the wireless network is on?
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Feb 12, 2010
Useing gnome network manger. I thught that is DNS resolve problem, and wrote in linksys router the same DNS as 3g huaweii modem use. Steel the some result. NO INTERNET. Change for static ip in router and try use the same gatway , but steell can't use connected at the same time to internet with 3g and local router.
Only one devace at the same time, Router have no any acces to internat. SO why 3g internet stoping working after connecting router to LAN ports? Has it some thing to do with subnet or ip range and routing table?
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Oct 27, 2010
At work, we (like almost everyone) are still full-on windows. I am currently trying to get away from windows because I am not a fan. my current windows machine (different from my Ubuntu machine) is accessing the wireless network fine, and there are no obvious problems there. Also, my Ubuntu machine can access my wireless network at home, so I know there are no driver issues. I set up the connection for the Ubuntu machine, and it seems to be connecting OK. I can ping internal IPs and by all statuses, the connection to the router is functioning. However, when I attempt to load a web page or ping a domain or external IP, it fails. I tried to ping the IP, thinking if that worked, it's probably the DNS, but pinging both domains or IPs fails. I have looked around at forums and posts, but none of them seem to match my issue (that's probably not true, but I am struggling to see the commonality).
Here are the results of "netstat -r":
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.45.0 * 255.255.255.0 U 2 0 0 wlan0
link-local * 255.255.0.0 U 1000 0 0 wlan0
default 192.168.45.5 0.0.0.0 UG 0 0 0 wlan0
And here is "ifconfig":
wlan0 Link encao:Ethernet HWaddr 74:f0:6d:XX:XX:XX
inet addr:192.168.45.49 Bcast:192.168.45.255 Mask:255.255.255.0
inet6 addr:fe80::76f0:6dff:XXXX:XXXX/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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Jan 7, 2011
After forgetting my wifi router password, I had to reset and reconfigure the router. I enabled WEP, and after I typed the password, the computer now recognises it automatically. But I can't connect to the internet no matter how long I wait. (The wired internet connection works fine.) How can I get the wifi to connect to the internet?
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Aug 2, 2011
I think something weird is going on. On a fresh installation of 11.04, I seem to be connected to my router just fine, but I can't reach the internet or anywhere else on my network. Anybody see my problem from what I've posted? The computer is only connected via wireless (so I don't know why eth0 would be connected as well). I can't think of what I'm missing...My system seems to be connected to my router on two interfaces. "ip addr" gives:
Code:
1: lo <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
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May 19, 2011
I'm running Ubuntu 10.04LTS 64bit. The desktop running it does not connect to my router or the internet. My mac laptop does. When I installed windows on this desktop, it too could connect. But after reinstalling ubuntu, I cannot. I tried upgrading to the latest ubuntu, but that just bricks my computer. Here is my ifconfig:
Code:
~$ ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:1d:09:95:39:76
inet6 addr: fe80::21d:9ff:fe95:3976/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
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Apr 27, 2010
I cannot connect to internet. I just installed Fedora 12 w/ the Live CD and I have a Linksys WMP54G Wireless Card (v4.1 I believe) and it apparently installed fine upon install of fedora. It will not thought connect to the internet. It reads my connect (NETGEAR-2.4-G), my router is a Netgear WNDR3300. It worked perfectly fine on Windows XP. Like I said, it picks up my wireless connection. But when I go to connect it attempts to connect for like a minute or two then goes back to not connected.
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Oct 4, 2010
AT&T will not help. I am trying to connect with Cable (CAT5). When I try to configure my network card with YaST here is the message received. "Unable to configure the network card becasue the kernal device (eth0, wlan0) is not present. This is mostly cause by missing firmware (for wlan device) See dmesg output for details"
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Feb 12, 2010
I have just installed Linux Mint 8 to an Asus A6000. My problem is that the computer won't connect with my wireless router. I have tried with MAC-adress and such, but still no respons. I also tried to connect with a cable to my modem, but no response there either.
I think I may lack some drivers, to what I think is Broadcom b43, but I am not sure. I tried to download the drivers on my other computer, and transfered them to the Asus. I managed to install 2/4 drivers, but on the two others, I get this message "Failed to fetch ... Couldn't reach archive.ubuntu.com"
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Apr 23, 2010
I have had a router die on me and have bought another (maybe a bad buy!) The new router is Linksys WAG120n. Ethernet is fine. Laptop wireless adapter is Atheros AR5009 802 11a/g/n. I have setup a wireless connection but it is not connecting to it. I have checked the router settings and these seem to be OK! I'll try to give any details required.
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Aug 12, 2011
Firstly, the actual problem I'm having is that when I start my computer (netbook) up in the morning and try to connect to the router (wirelessly) it just... doesn't work. I've used it before, at full signal strength, and it was completely fine. It never disconnects me or anything - but if I shut down my computer, like I do overnight, when I start it up again often it's hardly getting a signal at all (or so it says) and when it tries to connect it makes the connecting animation and occasionally flashes to a circular thing like firefox's loading animation. Eventually it just fails.
I try restarting my computer, but it doesn't seem to help. The last time, I had to wait until the signal looked "full" again, then delete the settings in "edit connections" for that router and only then would it let me log in again, even though I was using the same password from the same computer (even in the same place). That only seems to help when the connection looks "full" though, and even then, not always. Normally I'd try resetting the router, but I can't because it's locked in the next room (I rent a room here and the guy with the key is rarely around) but honestly I don't think the router is causing this, for a few reasons:............
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Apr 1, 2011
I have 2 pcs at home. I dont have a switch so I can connect only one PC at a time to my adsl router/modem for internet access. In the past I had successfully connected the two PCs (NIC to NIC) to each other using the same ethernet cable which was supplied with my dlink adsl modem.
Recently the motherboard of on of my PC went bad so I replaced it with a new one. The problem is when I connect the two using the same Ethernet cable they won't connect. The lights on the Ethernet port won't light up. I can still connect both of them to the adsl router (NIC to Router) (one at a time).
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Apr 24, 2010
Ubuntu 9.10 comes with rt2870, the driver for my Zonet ZEW2545, and I have had to blacklist rt2800usb in /etc/modprobe.d/blacklist.conf in order for rt2870 to work. My network adapter is able to attempt to connect to my router, but after 10-40 seconds it tells me I am disconnected again. This adapter works fine on windows.
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Jan 31, 2010
I've only been using linux for a few days so I don't know all the tricks. I'm pretty savy configuring windows networks however.My adapter is (according to windows) a: CNet PRO200WL PCI fast ethernet adapterLinux says it is a: 21x4x DEC-tulip compatible 10/100 EthernetI do seem to be getting an ip address from the DHCP router, but I cannout ping any other ips or connect to the internet.I've tried a bunch of different options, switching things back and forth, but it still doesn't work, and honestly i don't even know what some of the options mean.
ALSO, if this helps:
paladin:~ # ifconfig eth0
Eth0 Link encap:Ethernet HWaddr 00:08:A1:03:3C:99
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Oct 27, 2010
I have a telephone connection of 1 mega internet modem huawei mt 880 SmartAX my desktop computer is connected via an ADSL PPPoE.I use Ubuntu 10.04 in Spanish and want to know how to connect a WiFi router TP-LINK TL- wr942nd to provide wireless Internet to other 2 PC, a desktop with a plaquet wireles G CNet CWP-854 and 500 series notebook olivetti olibook. The issue is that when I connect the router I can not even go online and do not know how to operate the network, I can not even connect the desktop to my internet provider
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Jun 10, 2010
Currently I have an Acer Aspire One netbook with Windows XP on it. I want to switch to Ubuntu, so I have the OS on a flash drive and I can run it fine. The only problem is,I cant see any wireless networks in range. I know the router is working because I can connect with Windows fine. A notification also pops up telling me i have to install missing drivers. But when i click on install, the progress gets to 99% and fails. It says i need the Broadcom B43 driver, but i don't know how to get it.
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Aug 3, 2010
I've been trying for 3 days now, gone to a couple of ubuntu sites, asked some friends who unfortunately don't have the time to assist me, and gone through several forum responses on here to try to find the solution to my problem.The problem is my inability to connect to my wireless network. I have a linksys USB device for my wireless, and the wireless router is literally right next door to my room. I am able to find my router and my neighbor's router from my computer. However I can not connect to my router. It is WPA enabled, and I have the correct password. It is just unable to connect to the network, it tries for a few minutes then doesn't connect at all and says wireless network disconnected. I am currently hooked up to an unsecured wireless network, but I can't connect to the internet. I am using firefox, but it doesn't seem to connect to any site I try.
Here is the lspci
Code:
captain@The-Ship-Of-Capn-Alex:~$ lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8375 [KM266/KL266] Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8633 [Apollo Pro266 AGP]
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and when I ping I type in [URL] in the terminal and all that comes up is
Code:
ping: unknown host [URL]
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Mar 10, 2011
I use Hasee L141 notebook and ever since I installed ubuntu, my internet connection using both wire and wireless does not work but for the windows it works alright. I asked friends to help me but it yielded no result. Is there anything that I'm missing? I re-installed it several times but still had the same problems.Someone please help me. I even tried installing using the wubi.exe but still the same problem.
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Sep 29, 2010
I have a new laptop with me and I am unable to connect to internet from It. i have a wireless router with WLAN connection. I am able to connect from windows 7 But in ubuntu the network manager doesnt show any WLAN connections at all.. I am a newbie and dont know how to start debugging this Issue. I may like to know,
1. How to ensure that my linux distro has detected network card on my system as the first step
2.Then how to make the wireless connection UP and running.
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Oct 1, 2009
I have been using Windows XP, and last month i had Linux Mint installed. I was connecting to the internet with an external modem and everything was running fine, until while experimenting with the settings,i bust the whole thing. What i did was to do a "right click" on the 'computer icon' at the bottom right-hand corner to disconnect and from that day i am unable to connect from Linux, but i can still do it under Windows.I had done the same thing under Windows but after going to the 'control panel/network settings' i managed to get the thing working.I went to the 'control panel' in Linux, and under 'network ' i get the message: "Auto eth0 => never". i have been trying to 'edit' the 'settings'
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Feb 18, 2010
Just purchased a Dell Inspiron 580 MT tower pc with Windows Professional. However unable to connect to the network or the internet when I load a copy of Ubuntu Karmic on dual boot. Windows networking and internet working fine. Is this an ethernet adaptor hardware issue? Broadcom NetXtreme 10/100/1000 Gigabit Ethernet controller-PCI Express card Will try later connecting through a usb ethernet adaptor to see if this is really the problem.
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May 21, 2010
I am unable to connect to internet using my wifi network. Though I can share folders on network. Here are the details:
HP Pavalion laptop - DV6149us
lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
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Jul 29, 2010
I cant connect to the internet wirelessly or with a RJ45 connection. Last week my son came round and thought it was very call the internet worked fine then. Then he downloaded a programme called wireshark. Since the installation of that programme there has been no internet. Even the internet icon on the top bar has gone Aswell as the network manager section has vanished from the preferences menu. I have uninstalled wireshark thinking it will correct its self but havent had much luck. I am running Ubuntu 10.4 (lucid) Kenel Linux 2.6.32-generic GNOME 2.30.2
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Sep 24, 2010
I have dual boot system and on windows I am able to connect to wireless but on Ubuntu I am not able to connect to wireless.
I desire to learn to trouble shoot the problem my self hence I would appreciate if some one guides me How to look for the problem.
and how to find what is wrong and right
That is why I am not posting any output here but rather would like to learn to solve the problem by myself
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