Ubuntu Networking :: Can't Connect To The Internet With Ppp0 While Eth0 Is Active
Jul 2, 2010
My machine has Ubuntu 10.4, installed a week ago. I'm connecting to the Internet with a Wireless 3G modem, the interface is named ppp0. Additionally, I have a network card that is connected to a home router, that's eth0. Everything works fine with eth0 disabled, all my apps can access the internet correctly. But, my issue is that when i enable eth0, i can't access the internet with any app.
So why do i need eth0 anyway? The thing is that i must share my internet connection with my sister, who is also connected to our home router. I planned to give her access by installing squid on this machine and configuring her browser to connect to squid. However, since none of my apps can connect to the internet while eth0 is active (whereas squid and all other apps work fine with eth0 disabled) I can't let her connect to squid while squid is working correctly.BTW selecting "use this connection only for resources on its network" under "routes..." of the ipv4 tab of "Auto Ethernet" made it a little better. Firefox and Xchat started to work with eth0 active. Squid still doesn't work though (althought it works just fine with eth0 disabled)
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Jul 16, 2010
i was using ubuntu 9.10 till recently when i decided to upgrade to ubuntu lucid 10.04. turns out the internet icon shows connected after fresh installation but when i try to use firefox , after an long wait it shows server not found. i did a research of my own and found that i am not able to ping even my router.using sudo dhclient eth0 doesn't recieve offers , but surprisingly when i tried dhclient eth0 in root shell with networking internet got configured very quickly and i can ping the router and any website.i forgot to mention i have a wired connection which i am trying to connect and the net is working fine with windows 7 on the same PC.
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Jan 23, 2010
i want to share the internet connection from Laptop to PC via LAN crossover cable
here's how i connect to the internet in laptop, and connected PC via LAN:
i need to share pppoe(ppp0) to (eth0) , that is what i've been doing in Windows before, but i dont know how to share in Linux, i tried to follow Ubuntu Help about ICS, but it doesn't work
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Mar 13, 2011
I am running the latest ubuntu and I am having trouble getting networking sorted. I have 2 networks, one wired (eth0) and one wireless (wlan0). I connect to the internet using wireless. The problem is that I can only successfully connect to the internet if I disconnect from eth0. I have hit this problem with Windows machines and the solution was to adjust the "interface metric" in "Advanced TCP/IP Settings" so that the wireless was the preferred connection. How can I achieve something similar in Ubuntu?
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Apr 12, 2011
I'm a n00b with these things so be nice please XD I have recently touched on this in previous posts but never came to actually trying to fix it. I have a D-Link DSL-2640R router, with dhcp disabled. It is connected to my computer via ethernet. I have the network manager configuration set to manual with an address of 192.168.1.2, Mask 255.255.255.0 and the gateway column is blank. I would like to know why my eth0 interface seems to stop me browsing.
I use a T-Mobile HUAWEI usb mobile broadband stick, Model E1750 for internet access. If anyone has any ideas as to why this is happening please discuss them. I have also tried editing the /etc/sysctl.conf file and uncommented the net.ipv4.ip_forward=1 line to enable ipv4 packet forwarding. This has not solved my problem.
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Apr 30, 2011
I am running a CentOS 5.6 as a Virtual Machine on my Laptop. And, to connect to internet I am using a datacard (usb modem) device (Tata Photon +).
Now, internet is working well on my VM through interface ppp0
The problem is that when I start my interface eth0, internet (running through ppp0) stops.
Quote:
[root@kick ~]# ip route show
172.29.242.9 dev ppp0 proto kernel scope link src 14.99.211.189
default dev ppp0 scope link
[root@kick ~]# ip addr sh
1: lo: <LOOPBACK> mtu 16436 qdisc noop
[Code]....
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May 24, 2011
I am having broadband connection, I need to connect broadband internet through eth0. Please give me some use full information for configuring this.
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Jul 16, 2011
I am trying to sort out some issues following an upgrade from F12.
I have eth0 as the connection I want to use. Prior to the upgrade, this connection was enabled and active at boot.
Now, for some reason after the upgrade it has to be manually enabled at every boot - even though when I go the Network tool, Ethernet Device > General tab - "Activate device when computer starts" is checked.
At every boot time it is inactive.
In all the ifcft-eth0 files, the ONBOOT parameter is set to "yes".
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Jun 7, 2010
I have a question regarding the configuration of Network Connection. My wired connection is fine right now and when I check the network connection applet, it display active information of eth0. However, when I click the Configure button, the Network Connection window appears but there's nothing in the Wired panel. Should there be a eth0 in that panel? I remember I had one before, but after I messed with some configuration of VPN, my network became unstable and I remove the Network Manager to try to solve the problem. Since then, there's nothing in my Network Connection window, though I can still connect to my router with eth0. Now even after I reinstalled the Network Manager, I still don't get anything.
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Nov 23, 2010
I have installed and setup 3G which works perfectly fine. I use sakis3g scripts for connecting to 3G network. My VPN profile created with network manager (client/NetworkManager GUI) works well.
#cnetworkmanager --activate-connection=user,'XXXXX_vpn_singapore',wlan0,&
Now when I do the same with using using ppp0 (which is after connecting to VPN) I get the following error messages. #cnetworkmanager --activate-connection=user,'XXXXX_vpn_singapore',ppp0,&
[Code]...
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Jun 22, 2011
I have a 10.04 box connected to a router with DHCP and wireless. Lathough it can connect through the wifi, I can't get the connection working with the ethernet cable (which is the one I wanna use by default).
Code:
I may add that it's the default auto connection, but I've also tried to create one manually setting the right ip address, gateway, etc, and attributing the same ip on the router to the MAC address of the card. I've also tried to edit manually the interfaces file, with no effect, or no good one at least. This log comes from a moment when nothing has been changed from the original 10.04 installation.
And I have connected a laptop to this very same cable, and the connection worked straight away...
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Jul 16, 2010
I need to connect to an FTP server that only accepts active FTP connections. (In Windows, I have to uncheck the "use passive FTP" option in Folder Options in order to connect) Is there a way to do this with Ubuntu's Connect to Server system/Nautilus? I would like to be able to interact with the files as if they were local, as I can on other FTPs and on Windows.
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Aug 15, 2010
So, is it possible to set mobile internet as eth0? the reason for this is that etherape and wireshark wont recognize/work with my mobile internet.
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Apr 18, 2010
This holds true in Transmission and NOT in Vuze. UPnP is enabled, ports are randomized and open each time. Pings to outside still work fine, but I cannot browse to websites (404 errors) when the app is running. I'm stumped, is Transmission locking all other in bound traffic/ports except the one it wants to use?
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Apr 19, 2010
Current problem: fresh, clean install of Ubuntu 7.10 on known good hardware does not use/produce/get/have an IPv4 associated with eth0, so cannot connect to my home network for Internet access.
Background: Have been wanting to build and maintain a home file server for some time now. Have also been wanting some hands-on practice to help me progress from Noob to Intermediate, eventually advanced Linux Tech. (I have two decades of tech support experience, but only small fraction of that using command lines and almost zero Linux.)
Anyway, every time I download and attempt to burn a recent distro on my Vista Shuttle, I only end up making drink coasters and mini-frisbees. so I thought that I might have better luck if I used a Linux Workstation to download and burn a server distro.
That's where I an now. I took one of my fully functional WinXP systems offline, replaced the WXP HDD with an old 3.2 GB, dug out my 2008 edition Linux Bible, popped in the DVD that came with it, and installed Ubuntu 7.10.
Everything else seems to have progressed smoothly, but I cannot seem to get the onboard Via chipset ethernet controller to talk to the router. When I run "ifconfig" in Terminal, I see IPv6 info, but nothing for IPv4.
When I try to configure eth0, it doesn't matter whether I set it up for DHCP or static... nothing works.
Is there a command line tht I can use in Terminal to manually configure eth0 to use IPv4?
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Feb 20, 2010
Yesterday I moved my modem (wireless) to my living room so the PS3 detected a better signal. In doing so, I had to run a new ethernet cable from my living room where the modem is into my office where the computer is. I use ubuntu 9.10
For some reason I cannot connect to the internet now. When I scroll over the connection, it says wire connection 1 is active. I have my settings manually set. I did notice the MAC address field is blank...
I didn't have an issue before, but with changing cables and whatnot, something got messed up somehow.
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Nov 19, 2010
I want to use FTP client (for example ncftp) to connect in active mode. I have firewall (iptables) on my laptop and most of time I am behind rooter. With outgoing packets and with passive mode all is working fine.But some sites accept only active mode.I could open some port range in firewall and in rooter for active data packets, but I don't know how to solve security issues.So how should I correctly manage active ftp connection?
How can I set data port range when opening active connection with ncftp (or maybe another ftp client)?How can I limit that incoming connections to that ports range is accepted only by ncftp or else dropped?
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Oct 15, 2010
I have two connections for my PC, my Ethernet which is on the corporate network and my smart phone on 'usb0'. Both have full internet access.I want to stop my PC from connecting to the internet over the Eth0 while still connecting to internal servers then just have internet over usb0.If I go to the settings of 'Auth Ethernet' in the tray area, under IPv4 there is the routings section - I've tried enabling "use this connection only for resources on its network" but it doesnt work.
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Apr 30, 2011
my internet was fine.. until.. i had to work in the school so.. a teacher configured the internet settings.. for something .. ( i don't remember) and everything was fine. but when i returned to my house and conected my lap to internet (cable) the internet didn't work.
ubuntu@VR:/etc/network$ ifconfig
eth0 Link encap:Ethernet direcci�nHW 00:1d:72:46:38:3c
Direc. inet:192.168.1.65 Difus.:192.168.1.255 M�sc:255.255.255.0
Direcci�n inet6: fe80::21d:72ff:fe46:383c/64 Alcance:Enlace
[Code].....
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May 11, 2011
im a linux noob dont get techy ill die of brain fry im running a craft bukkit minecraft server on my 11.04 ubuntu server. however the server uses my only 10m Ethernet cable that i normaly use for my ps3 (i will NOT go wireless. i hate it (or dont like it)) therefor i found an old PCI NIC in an old computer, its a 10/100 realtek one. ifconfig detects it (after two commands:
Code:
ifconfig eth0 up
dhclient eth0
)
now i need to send the internet to my ps3 too.i know the connection wont be blazing fast but isnt it okay?it musnt interrupt the minecraft server. if you need info just ask. ill try and provide them.
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May 2, 2010
Upgraded To Ubuntu 10.04 The Other Day. And when I first installed it everything worked great except for my sound card which I fixed. But there was no problem with connecting to my Router via an Ethernet cable. Then I updated the video card drivers, restarted my PC and it wouldn't connect. It would try over around 1-2 mins then tell me its disconnected. No green light activity on the router / network card either.
I've reinstalled fresh copies of Ubuntu a couple of times now, Hoping to get the default settings back. But nothing has worked since.
I looked around the net and found quite a few people had this problem on previous versions of Ubuntu but it would seem most of there fixes were for there Version, so it hasn't helped me.
Heres some info:
ifconfig:
I've tried all the various things from dhclient to ifup/ifdown etc etc.
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Jan 18, 2010
I've installed Eagle Server in a Cisco lab but R1-ISP router can not see the server because of eth0 is inactive.I'm new in Linux OS.So, how can I make eth0 to be active?
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Nov 8, 2010
A couple of days ago I Obtained a spare computer and installed fedora 14 on it, just to try it out. I only have experience with microsoft windows so I'm new to this system. The OS seems to work fine but I can't browse the internet with firefox. I'm using a speedtouch 546 v6 modem with adsl(wired). The network manager indicates that the wired connection "auto eth1" is active. The previous OS was windows xp. I was able to browse the internet whit this OS. I removed it because it was crashing all the time (illegal version).
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Mar 12, 2009
working to sort out the damn wireless for too long. Mine in cent05 5.2 . network manager is on and I can see the icon on tray. It list all the wireless connections too, but just won't connect. WPA encry is disabled. further details below:
# lspci | grep Wireless 0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
# ethtool -i eth1
driver: ipw3945
version: 1.2.1dm
firmware-version: 14.2 1:0 ()
bus-info: 0000:0c:00.0
[Code]...
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Apr 20, 2010
I have tried clean installs of Knoppix v0.6, Xandros 2.0, and Ubuntu 7.1... same issue with all. I cannot seem to get eth0 (via chip on mobo) to get/have/use IPv4. ifconfig shows only IPv6. (I cannot paste any info because linux desktop is on different box.)
End result is that I cannot get the linux desktop to connect to my lan, either with dhcp or with static ip.
I have a belkin router configured as my gateway 192.168.3.1 and nothing fancy with the setup. I have dhcp open for 192.168.3.245 thru ...254 and at most there are only 4 systems in home connecting with dhcp at any time. all other systems have static addresses.
I have two decades of desktop and lan support under my belt, but relatively small amount of command line experience and almost no history with linux (unless you count a dozen unsuccessful attempts to burn linux distro install discs on this Vista desktop).
Therein lies the start of my prob. I need to build and manage a fileserver for my home, but cannot seem to get a working installer cd or dvd to burn from anything I download.
So I said to myself, "Self," I said, "you're a tech. Build a workstaion, use the DVD that came with your Linux Bible (2008 Ed.) to install one of the linux distros on it, then download a recent, stable server distro and burn it using the linux workstation."
Unfortunately, if I cant get an ipv4 connection to my home network, I cant get out to the Internet to download any newer ISO files.
So what am I missing or doing wrong? How do I tell linux to stop trying to use IPv6 and let me use IPv4?
BTW, eth0 works just fine if I install Windows on that PC, so I know its not bad HW. Could it be a driver issue? Or do I need to use some Terminal command to turn off IPv6 and reconfigure eth0 for IPv4?
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Jun 15, 2010
internet works with MTU=1460 for ppp0. I set this up manually using ifconfig. What changes are required so that it is done by default when PPP0 connects or at boot?
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Dec 1, 2010
I've got access to my LAN and the Internet via my wired ethernet connection. I'd like to share that access with my iPod Touch (device shouldn't really matter) via an Ad-hoc wi-fi network.
This tutorial in the docs seems to describe the right setup but is very out of date (7.04). Instead I found this tutorial and followed it to create the Ad-hoc wireless network. I was able to connect my touch to the resulting ad-hoc network without a problem, but I didn't have LAN/Internet access.What's the next step to get the clients on the ad-hoc network out to the Internet?I found this page in the docs that says I'd need to install dnsmasq-base and uninstalling dnsmasq. I checked and dnsmasq-base is already installed but dnsmasq is not. I do have dnsmasq in /usr/sbin but the package description makes it sound like this should come with dnsmasq. Is the page out of date? Will uninstalling dnsmasq cause other problems?
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Mar 29, 2010
A friend called me today and he explained to me that after his ubuntu install he was unable to connect to a wired Ethernet network. He says it trys to connect using ETH0 and then seemingly fails and disconnects. I have him run a if config and send me a pic. The very odd thing about it is He had a lot 5-8 INET6 address? The laptops is Acer extensa 4420
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Oct 24, 2009
When I activate eth0, the system says that the eth0 seems not exist. However, I can surf in the internet.
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Feb 14, 2009
Since I have a new internetaccount, 2 days ago, I have a problem on my server [Fedora Core 8]. I use it as a router.
eth0 is for the internet.
eth1 is for my LAN.
But since my new internetaccount my server uses eth1 for the internet. This is a line from my syslog:
Code:
NetworkManager: <info> Policy set 'System eth1' (eth1) as default for routing and DNS. I killed the NetworkManager daemon and now it works but this must not be the way to do it? Where do I tell my server that I use eth0 for routing and DNS?
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