Ubuntu Networking :: Can't Access Internet On 4 Port Ethernet Router
Mar 1, 2010
I changed to a 4 port ethernet router (D-Link DSL-2542B Adsl2+)with intention to share Internet access with my brother (he's on Vista).Initially it all went well,but 3 days ago there were connection problems occured on the part of the ISP. Without realized the problem,I had reset the router.This morning I've been informed by the ISP that the connection has been re-established.So,I accessed the Internet via the 4 port router but failed to do so (server not found).Suspecting that the problem was from the 4 port router,I reverted to my old Adsl router (DSL-520B single port) and without any problem I managed to access the Internet back.I really need help to configure back the 4 port ethernet router to its initial state.
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Mar 18, 2010
Ever need to provide access to multiple PC's and did not have a router only a hub. Maybe this isn't original thinking, but then again maybe you didn't think of doing it this way (which i am sure there are many ways to do it) So I have 2 Ubuntu Servers, 1 Windows Box and a Hub - All 3 with internet access off of single ip and single Ethernet port.
While searching for a backup method today I came across Clonezilla. I was wondering if this was the right thing for me and since I needed to backup my roommates PC for a reformat and install of Windows I decided I would give it a try, but only if it would work. I didn't want the hassle of going into the main part of the house and finding out what cord was what as there is a cable modem connected into a switch (4 static IP's with internet) and one port of the switch hooked to a router) Anyways, didn't work he was on the router I was on the switch)
But this got me thinking. When I setup my server to do this, during one of the setup scripts it said it was setting up Internet access for client machines and that it was assigning them IP addresses threw a DHCP server that it had installed.
So, I dug up the hub connected the internet cable to hub up link and Server 1 on port 1 Server 2 on port 2 and Windows on port 3 The main server gets the internet provided IP address and routes it to the hub via a virtual interface. Server 2 is configured for DHCP and the windows box, It was set to get info automatically but it didn't fill the DNS info so I had to manually do that (just a heads up) I decided to use OpenDNS Servers (208.67.222.222 & 208.67.220.220) but im sure putting in the gateway IP address would have worked too.
So, by now if you need this I am sure you are excited and want to get to it. Like i said there are probably other ways of doing it, ways that don't involve you installing clonezilla and DRBL, maybe even just DRBL is needed, maybe one of them installed whats needed as a dependency- all I know is it works, if you know - elaborate so people know, but hey- this way not only do you have internet access on all PC's you can deploy custom images to them as well.
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Jun 21, 2011
I am running Ubuntu 11.04 and i am curious to if there is a way to share my established wireless connection through my Ethernet port.. I know it was possible in Windows by going to adapters and bridging the wireless, and Ethernet adapters. how to make this work in Ubuntu?
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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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Jul 8, 2010
I have a newer Belkin N+ router that has a USB port for accessing an external hard drive.I can access the HD with no problem in Windows.I am new to Linux/Ubuntu and cant seem to connect to the HD. In "Network" I have a folder "Windows Share" and within that folder is where I see the HD "CBHD" (name of my drive). I cant click it because when I do, i get an error message along the lines of (cant remember exactly right now) "Failed to mound"I typically access the drive in Windows via : \192.168.2.1
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Jun 5, 2011
I am using ubuntu (11.04) here, when i connect Bsnl broadband link(wired connection). Internet is connect automatically But unable to instal, upgrad and access Internet pages ..
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Jan 9, 2010
I've installed ubuntu 9.10 64bit onto a usb flash drive and found that even though I can connect to my safecom adsl modem/router I can't get an internet connection, the previous versions work and it works with a Linksys router. Is this a known issue with a fix?
I'm using a Toshiba satelite pro!
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Apr 18, 2010
I have a dual-boot desktop with Windows 7 and Ubuntu.Problem: Linux does not recognize my D-Link DWA-131 Wireless N USB Adapter. So, I can't access my wireless router or the internet.D-Link has a Linux driver for the DWA-131 posted on their website URL...that includes a readme file with long, strange, convoluted instructions on how to install the driver.
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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
[code]....
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Apr 28, 2011
Today I set my HPG50 with Ubuntu 10.10. I used network install disk, then tasksel to add Ubuntu Desktop. Everything was fine, I set up my samba shares and a few other things. I had the NM icon on the panel but did have to configure. I was on wired connection and I could surf no problem. When I went to set up the wireless, I noticed the icon was gone. I know it was there after the install. At some point the network manager icon disappeared, not sure when because I could still access the router and internet. I spent a few hours surfing google and the forums trying to find an answer. Then, after running update and upgrade I lost internet. Even though I could see the router, I connected straight to the modem, still no internet access. I unplugged the cable from that machine and plugged it into my other system and I could surf just fine.
It was clear that nm-applet was running from running nm-applet at the terminal - nm-applet - "An instance of nm-applet is already running - Warn Couldn't initialize the D-Bus manager. nm-tool - State - connected, Driver r8169, State Unmanaged, Default no. NetworkManager.State - All three entries are set to "true". It seems clear that some other app is managing my connection as I can access the router and am currently serving video to my apple tv from this system. How do I find which app is managing my connection?
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Jun 5, 2010
I have I fileserver on my home network. It has a static IP and is plugged into the back of the wireless router. It is fine on the network but cannot access the internet. I noticed this when I was trying to update my package list. This is what is in /network/ interfaces:
auto eth0
iface eth0 inet static
address 192.168.2.100
netmask 255.255.255.0
network 192.168.2.1
broadcast 192.168.2.255
gateway 192.168.2.1
[Code]...
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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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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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Oct 11, 2010
I just installed Fedora Core on my Dell Inpsiron B130 laptop and I am having trouble connecting to the internet both wirelessly and with an ethernet cord into the router. When trying to configure my network, I dont recognize any of the ethernet adapters in the drop down list. I have been told that my wireless card is Linux compatible (dell y8029 dell wireless 1370 802.11/a/b/g mini pci). My ethernet card is a B130 Broadcom Ethernet Driver which isnt in the drop down menu either.
I read that I need to download an ndiswrapper but I dont know where to find this download AND even if I could download it to a zipdribe, I have trouble opening a USB flash in Linux becuase its not a "valid block device". This is after the command "mount /dev/sda1 /mnt/usbflash"
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Aug 30, 2010
i have an embbeded hardware that uses bootp for booting from a Network Managemnt Host (NMH)on the same ethernet. The embedded hardware has both kind of ports i.e ethernet as well as E1/T1. I would like ask, what do i require to establish a communication-link between the embedded hardware and the NMH throuh E1/T1 ports of embedded hardware, so as to make it boot through from E1/T1. Further, NMH possesses only ethernet port. Just to refine my questions i'd like to know what additions do i need to do on my NMH , like may be i have to put an E1/T1 port or is it possible that the E1/T1 port can be directly connected to an ethernet port on the other host.
pardon me if i am not making absolute sense here as my knowledge is limited on Layer 1 and layer 2.
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Jul 30, 2011
I'm curious is it possible to access your router settings. I'm trying to open up a port. I have done this in my firewall now I need to open up my port through my router. I'm using fedora 15.
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Sep 2, 2010
I tried to setup a connection as below but face some problem (probably route table setting incorrect). Hope if anyone could shed the light.Basically, I have a PC1 (.1) and PC2 (.130) connected via a PC router. PC router has 2 interfaces: wireless (.2) and ethernet (.129). PC1 connects to PC router via LAN cable/wireless interface, while PC2 connects to PC router via cable. This settings try to simulate 1 wireless connection along the path (and because PC2 is too old to support wireless interface, we need a PC router). These interfaces are all under same 172.16.130.x subnet.
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Oct 8, 2010
My old G USB network stick died and I also cannot get my internal ethernet to pick up my router. I've tried installing ndiswrapper, but I keep getting prompted to insert the installation cd for ubuntu's Jaunt Jackalope, which is what I am currently operating. I don't have an installation disk. I installed this version a while ago via usb stick (which I no longer have). Is there any way I can install ndiswrapper without having to use a ubuntu installation disk? I'm hoping installing ndiswrapper will solve my inability to connect wirelessly to the net via either my ethernet card of the new NetGear N100 usb network stick I just purchased.
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Jan 16, 2011
I recently installed Ubuntu via "wubi", and tried to set up the Wireless. After looking at a few threads, they suggested using an Ethernet cable to troubleshoot the problem. However, my laptop does not detect the router even via an Ethernet cable. I am running 64 bit(It auto-downloaded with wubi) on an Acer Aspire 5553G, and my router is a Netgear DG834G. I have an Atheros AR8151 PCI-E Gigabit controller, a Broadcom 802.11n Network adapter and TAP Win32 Adapter V9.
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Sep 14, 2010
OpenSUSE 11.3 x64 KDE I dont know what happened it is a new install thats been running for 2 weeks . Now for some reason I can not access the internet or the router. Samba is working with Dolphin I can browse shares on local network both Windblows and Linux and ping local IP's. But I can NOT ping my router (the default gateway IP) with this box or access it with firefox so no internet. A VirtualBox of XP Pro running on this box has no problems with its bridged adapter getting out and seeing the router. I disabled the firewall, added gateway IP to network settings, disabled ipv 6 from the get go, added service provider dns's to nameservers tried opendns servers also.
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Dec 20, 2010
not *buntu related but what is the difference between an adsl router and an ethernet modem?
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Jul 27, 2011
I am running 11.04 on a Dell Inspiron 1501 (the first gen.). I was using my Ethernet port to connect to the internet until about two weeks ago - suddenly the system no longer recognised that port even existed and just kicked me offline. I am able to get online now with a wireless card (replaced the broadcom card, that was a whole different can of worms...).
why my system is unable to connect with the Ethernet port? If I plug in the cable nothing happens.
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Oct 30, 2010
getting a VLAN router with a wan interface capable of Ethernet and AMT? something under $80-$100 pref.i need to segment a client on my home network.
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Jan 12, 2011
I have been working with Linux for about 10 years and I have a good understanding of IPv4 networking and routing but not so much detailed knowledge of implementation or specific networking packages.
I have a Linux system running a custom-built (Linux from Scratch) distribution and using 2.6.15 kernel. My system has 4 Ethernet controllers (eth0, eth1, eth2, and eth3). I have intentionally left out support for forwarding/routing of packets as this machine is not intended to be a router and I specifically do not want it to be able to so. My intent for the machine is to function as a server to 4 different and separate networks without allowing traffic or hosts on one LAN to access or adversely affect those on the other LANs.
My main question: is there a way to completely isolate the connections to these LANs and if so, how might I achieve it, and through what packages?
I have been having some issues:
1) Default gateway. With only a single default gateway, network requests from a LAN that is not directly connected to one of the 4 NICs and for which there may not be a static route defined, may send a response to the default gateway which is on one of the LANs connected to a different NIC than the one that I received the initial request on. Is there anyway to isolate outgoing messages to only go out on the NIC that the corresponding request was received through?
2) Default gateways. I have a requirement to allow DHCP on these interfaces. It is possible that the DCHP servers on each of the 4 LANs may provide a default gateway, but I don't see how I can make use of that. I know that there is a way to configure multiple default gateways via the iproute2 package (which is what I am using) but I don't know how to make sure that the correct default gateway is used for requests that were received on a specific interface.
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Jul 29, 2010
I can't figure this out for the life of me. I am new to Linux too. Wireless works fine. I plug my Ethernet in and turn off wireless and I cant surf the web, download, etc...Network Manager finds the wired network under eth0 and it works perfect on my non-linux desktop (nervous to even mention Vista around here). Firewall was set up with basic setup (I didn't make any changes). I have a Sony vaio VPCCW21FX with fedora 13. Can anyone point me in the right direction?
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Apr 29, 2010
I have a Dell Studio 1501 Laptop and I want to bridge the wireless with the ethernet port so I can hook my xbox360 to my laptop.
I've spent the last 2 hours trying different techniques but nothing is working.
I'm running Ubuntu 9.10 so the last thing I tried was going into the network manager, clicking on wired, editing the ethernet port and allowing it to share. This did nothing.
I tried to share the connect with firestarter but that did not work either.
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Apr 20, 2011
I am using ubuntu 9 but unable to connect to internet via my usb Siemens c110 modem. I have a dual boot system of both windows7 and ubuntu9. I am using the same modem in windows7 and have installed virtualbox where i have installed the same ubuntu9 but there it automatically detects the wired connection(usb)[eth0] but in the actual boot it doesnt detect anything. I have typed in the terminal sudo ppconfig but it was unable to find anything.
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Mar 14, 2010
I just finished setting up my small server, however I realized that no one can connect to it from the outside. The reason being is that my router is assigning internal ip's and dyndns is linked to that. I need port 80 for the Apache server, but if I have the router forward that port to my particular ip, won't it screw with everyone else's internet too?
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Mar 2, 2011
Just today I installed opensuse 11.3 on my Compaq CQ61. Even though I am able to connect to networks (both with an ethernet cable and wireless) I don't have internet access. I have used opensuse for a very brief period in the past and I had no such problem.
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Jul 21, 2011
I'm running an ubuntu maverick server, and I'm having a slight problem with networking. I've only got one ethernet line running into my room, and I've got loads of computers. The server has 2 ethernet ports, one integrated into the motherboard, one on a PCI card that I took from my old server. The on board ethernet never worked on my old server- but I only tried it out post-install, it was hooked up to the card during install (For the record, networking on linux has *never* worked for me if I installed then plugged in the networking stuff after the fact). So I just used the card instead. Transferred the hard drive into a new machine, and lo and behold, it would only work after I transferred in the card from the old one. What I wanted to set up is a basic NAT system, where the network connection is routed through from my server to my main desktop- but when I run ifconfig, my card is not detected, just lo and eth0. How can I fix this?
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