Ubuntu :: Couldn't Establish A Connection, Even Local Network Only Via DHCP?
May 25, 2011
For strange reasons I was stuck without an Internet connection for about 2 hours. I couldn't establish a connection, even local network only via DHCP. This was on Natty. After 30mins passed, I rebooted to Maverick only to get the same results. With nothing else to do, one hour after, I booted into Windows XP to play Dragon Wars 2. Lo and behold! I had Internet connection. At first I thought it was a technical problem with my ISP. So I rebooted hurriedly to Natty and after several minutes of trying to coax Network Manager for a damn fre*kin* connection it still couldn't.
Back again to XP, I couldn't believe that I wasn't experiencing some kind of on/off signal from my ISP. It wasn't just a coincidence that I could connect on XP and not on Natty. The connection was fine! And I've reason to believe for the past 2 hours, my ISP wasn't the culprit. .. this time it was on my end.Now - on Natty - I manually configured the connection (Instead of DHCP) to be greeted with the familiar Connection Established prompt from notify-OSD.
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Jan 16, 2011
When ever i try to access 202.164.53.122 through ssh i get the following error message:
Couldn't establish connection to proxy: Network is unreachable ssh_exchange_identification: Connection closed by remote host
I have a account at 202.164.53.122.firewall is on.
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Aug 13, 2011
I've installed the Ubuntu 10.04 Server onto a PPC G4 Mac just for the experience of setting up a server. During the installation process Ubuntu couldn't auto-configure my DHCP Network. I'm using the airport card on a wireless network. How can I manually configure the network once Ubuntu is installed.
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May 16, 2011
I'm new in SUSE 11.4. My problem is: I'm using Alfa AWUS036H card. It's recognised and I can establish connection to my network, but cant get to Internet. I can't surf the web cos Firefox tell me that connection is timed out. Now I'm confused why I can't surf the web even if I'm connected. Also, I trayed to instal linux drivers for this card folloving Ubuntu "how to" and it just dont work.
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Sep 26, 2010
I have installed openSUSE KDE 11.3 on my notebook. Everything looks great, but I can't connect on internet. It looks like dhcp don't work. Wireless works fine, only auto eth0 don't work.
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Feb 12, 2011
I have had long term access to a networked HP Photosmart printer but now I get the following message:
Unable to open device hp:/net/Photosmart_C5100_series?ip=192.168.0.161.
when trying to access it.The ubuntu desktop is wired to the router as is the printer and another iMac wirelessly can still print to the HP. HPLIP status shows the icon for the printer but with a red x indicating no connection to it.The only recent network change was the removal of another router from our network. (service is DSL via a combo modem/router from service provider which previously was connected to a Dlink router which has now been removed from the chain b/c was redundant to the modem/router)
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Jan 27, 2011
I'm trying to connect to a hidden wireless network in ubuntu through the terminal but i am unable to do so.
I first tried using ifconfig,iwconfig and dhclient initially but i am only able to get an ip address without the default gateway and dns server addresses which i normally get through the network manager applet.
Then i tried using cnetworkmanager but failed miserably again i keep getting this error
Code:
Another applet is running: Bus name already exists: org.freedesktop.NetworkManagerUserSettings (pid 1851)
Then i used nmcli available with the network manager package. i was able to establish a connection only with the connections showed in the list. i use a hidden wireless network. i am unable to connect to the hidden wireless network using nmcli without actually creating a connection from the network manager applet.
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Sep 25, 2010
Since a few days ago, I have too much problems to connect.When I try to connect to Internet with Firefox, the following message is printed out (, most of the times):Code:Unable to connect Firefox can't establish a connection to the server at URL...
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Mar 31, 2010
I installed ubuntu Karmic Koala 2 weeks ago, and while I have been able to connect to my school wireless, I have not been able to establish a PPPoE connection (username and password).After my most recent try, following this guide:-karmic.htmlMy wireless connection has gone as well.My network manager applet shows my school network, and shows that it is trying to connect, but it cannot establish a connectionand i apologize in advance for any information that i am lacking. please let me know, and i'll try to get the information.I'm running ubuntu on a separate partition, alongside windows XP home.
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Jan 15, 2010
t "Failed to Connect Firefox can't establish a connection to the server at127.0.0.1:3580." when I try to open a Help File of one of the applications I have.My /etc/hosts file has its entries right:127.0.0.1 hostname.hostdomain hostnameMy firewall is also disabled.
nmap -sT -O localhost
gives me (I have included some):
2401/tcp open cvspserver
[code]....
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Jun 3, 2010
My router is a DHCP Server.My Access Point is a DHCP Server.I'm wondering if it is really necessary and usefull.Is it possible to get an IP from the Router through the Access Point.For exemple I connect my laptop to the wifi Access Point and the IP is given by the router only.
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Oct 21, 2010
I know there are tons of help guides out there for this, and I have looked at and tried them all. I am trying to do something really simple, and just can't seem to get it working. I have been trying on and off for the better part of a week now, with not much luck. What I am tyring to do is have a Ubuntu 10.10 server serve out DHCP addresses and be the DNS for the local network. The local network will have no internet access, so it only needs to know the names of the local server. My network setup is as follows:
1: Windows Vista web server
2: Ubuntu DHCP3 and BIND server to give IP's and resolve local names.
3: A bunch of tablet computers connected via dhcp to the network, that need to access the web server on the Windows machine.
I have DHCP working nicely, but it fails to propagate the hostnames to the tablet computers. Unfortunately I need this to work, as the tablets do not have the capability of having a 'hosts' file.I have tried just about every self-help guide I can find, and just can't seem to get this work. Everything seems to work fine except for the name resolution. Any help would be great, I don't have that much hair left to pull out!
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Jun 2, 2011
how to configure dhcp server in a local lan network
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Apr 9, 2010
I've just installed opensuse 11.2 with the network installation iso. During the installation, it has got the IP via DHCP without any problem, and I has downloaded all the needed packets without problems... But when the installation finish.I have no network connection It's strange, because I have IP address, I get the IP from the DHCP server, and I can see the IP addreess if I do "ifconfig", the default route and even the DNS servers in the resolv.conf file; but I cannot ping my gateway (that is the DHCP server as well!!), I cannot ping anything in my network and either anything in internet. I see a network error at the start, but it finally gets the ip address. In the dmesg, the last message repeats over and over. The machine is a Hyper-V virtual machine, but as I said... I worked very well during the installation, I don't know what is going on. I've tried to reinstall, but it doesn't make any difference
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Apr 23, 2010
I'm trying to setup PPPoE connection to establish my DSL connection, but I got
Code:
pppoe[3885]: read (asyncReadFromPPP): Session 4479: Input/output error
pppd[4104]: Cannot determine ethernet address for proxy ARP
in my sylog file.
When I do pppoe-start, it connected but I cannot ping into any destination (even to my modem in the same network). DNS servers are explicitly set in pppoe.conf and resolv.conf. Did I miss anything?
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Oct 14, 2010
How do I tell the shared connection that it has a static IP and that I dont want a DHCP on the network?Do I have to set up DHCP on the box with the shared connection, even if that box only runs DHCP for a single IP address being the eth0 that is shared?Or can I tell the shared connection that it has a static IP and still allow network manager to run the shared connection?Or should I specify static IP's for all clients and the shared network manager and install say firestarter on the gateway to run the NAT for the eth0 out to eth1.
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Jul 17, 2009
I'm having a bizarre problem where my network connection stops working randomly. At first I thought it was a DNS issue since Firefox simply chilled out on "Looking up [hostname]" until it timed out, but after further investigation (pinging IP's, "host" and "dig" being unable to reach servers) it became apparent that I couldn't even access the DNS servers i.e. the Wicked Connection of the East was most sincerely dead.
There are two strange things about this: one, there are no errors except "timeout". The network manager is happy, Firefox is happy until the lookup fails... Two, the failures only start *after* DHCP configuration. DHCP configuration never has any trouble sending or receiving packets. I'm going to try static IP and whatnot to see if that helps, more information later.
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Sep 9, 2010
I am a web designer and don't know anything about servers. My server service provider use Linux environment and sometime it would be much easier for me to have a local server to test my websites. So I have install a fresh copy of Ubuntu 10.04 to one of my computer. Half way installation, the system tell me something like couldn't configure the DHCP, I have checked that my router has enabled DHCP servers (D-Link 615). After installation and logon, I use sudo pppoeconf command and try to set the network.
But it said something like no PPPoE access. I know I am very dull, and maybe get ban from this forum because I have not read the instruction, it will be great if you can point me to the right page. All I want to do is have something like a web space + MySQL and support PHP to work with.
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Nov 24, 2010
What I have:
Computer: Dell XPS M1210
Modem: SpeedStream 51000 - It's SBCGlobal
I followed the pppoeconf setup instructions.
cracker@Jack:~$ sudo pppoeconf Plugin rp-pppoe.so loaded.
RP-PPPoE plugin version 3.8p compiled against pppd 2.4.5
I then asked it to start the connection.
cracker@Jack:~$ sudo pon dsl-provider
Plugin rp-pppoe.so loaded.
RP-PPPoE plugin version 3.8p compiled against pppd 2.4.5
Checked connection information and got this.
cracker@Jack:~$ ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:18:8b:dd:6e:cb
inet6 addr: fe80::218:8bff:fedd:6ecb/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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Nov 20, 2010
I have set WAN to 'bridged' mode for my D-Link DSL-G604T so that individual devices can connect directly to the internet.
A problem I now face is not being able to connect a computer running Ubuntu 10.04 LTS to the internet via DSL.
The computer connects to the D-Link DSL-G604T router via wireless network connection - which is established, but I am unable to connect to DSL and I don't know why. The DSL connection doesn't even list under the network icon at the top right.
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Jul 25, 2011
I have a wireless cable modem/router and a PCI-E 1x wireless card in my desktop PC. It works perfectly until I connect my Ethernet cable to my local router and printer, no more internet connection. I am guessing there is a setting somewhere that tells the networking software that the hard wire connection is the primary internet gateway. How do I tell it to use the wireless as the primary gateway?
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Jun 6, 2010
I dual boot windows xp and ubuntu 10.04 LTS and the wireless card works perfectly fine in xp so I know its not a hardware/network issue. In ubuntu, it detects wireless networks, will connect to network and work for about 20 seconds.
[Code]....
and it continues on after this alternating between a normal 20ms and high ping over 200ms. The connection refuses to load anything off the internet/local network.
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Feb 15, 2010
I am trying to establish an ssh connection to my server. I have a regular ssh connection working through the command line, so I know my key works and I have the port forwarding on the router correct.
When I go to Places -> Connect to Server the window comes up properly. The only problem is that the drop down menu only has one option in it for Service Type. It is Custom Location. I have had this set up in the past and there were other options there. I chose the ssh connection and everything was fine. Now it doesn't work.
I have tried to completely uninstall nautilus and reinstall it, but that didn't work. When I did uninstall it, I uninstalled gnome-session as well, and I reinstalled that one too.
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Nov 12, 2010
I've got an Expect script that establishes a ssh connection to the iLO interface of a server. Problem is it drops me back to the local terminal and I can't enter commands to be executed on the remote host. How do I get it so it logs me into the server then leaves me connected to it?
Code:
expect -f - <<-expect_script_end
spawn ssh -o StrictHostKeyChecking=no $user@$host
match_max 100000
expect "*?assword:*"
send -- "$pass
"
send -- "
"
expect eof
expect_script_end
The ssh server running on the iLO interface appears to be sending eof's which is causing expect to exit. How can I get it to ignore them?
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Apr 3, 2011
I am trying to set up, I am having problems understanding what steps I need to take but have done the following on recommendation of help from linux forums but am not getting anywhere with what I have done. PC:
Laptop Dell latitude D610
Ubuntu Gnome 2.26.1
I currently have a wired connection to my laptop but am trying to set up wireless, I have put the antenna on the router and have a wireless network showing called NETGEAR, amongst others, which is my primary router name so i'm trying to connect to that but the actual wireless antenna is on the switching hub. For all intents and purposed assume I am a complete newbie with ubuntu and linux command line stuff, I know basics like pwd, ls and so on but need a good bit of help trying to do this. When I click on this wlan network NETGEAR I get asked for the password, on the bottom of the switching hub is a code for WLAN and I put this in, it then asks for a password for a default keyring, which I do not know. How do I find this out?
But I am still not sure what I am supposed to be doing or looking for to resolve this connection problem, not only am I not a network expert I have no knowledge of linux either and steps to follow to establish a connection.
[Code]....
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Jul 18, 2011
I'm using Ubuntu for almost two years and everything has worked well till now. One day I have reinstall ubuntu in my computer, but then something went wrong. I couldn't anymore establish my internet connection. I have tried everything but nothing helped. I even reinstall my ubuntu multiple times but there was no efekt. Even when I installed Kubuntu or an older Ubuntu 10.10, there was no internet. I'm also using Windows 7 but there is always a internet connection. I didn't change any hardware on my computer, only a new AMD graphic card. I'm using wired optical Internet 10/10 MB.
[Code].....
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Jan 29, 2011
I am running opensuse with LAMP, and this is my first time setting up this type of server (usually am a windows junkie) My problem i am having is that I am unable to view my website from outside the local network. I have setup my router for a dynamic dns and forwarded all the ports through the router and the local firewall. I ran the apache setup through YAST2 and everything seems fine locally but when i attempt to access it elsewhere its not connecting. computechsolutions.dyndns.biz is the dynamic dns address i have setup through my router.
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Oct 17, 2010
I just got an error message and i have no clue what it means.Error: Unable to establish connection with FAM.Do you have "FAM" or "Gamin" installed and running?I installed the net cd of Lenny and it is up to date so I don't know whats up.
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May 3, 2010
Dual boot Vista Basic and Ubuntu 10.04 on low spec PC. I can connect to the wireless when I am next to it. I move to the room where the computer is normally used and I lose connection. I can still see it but it fails to establish a connection. Okay, sounds like it's just too far way but when I re-boot and use Vista, it works fine (1 or 2 bars, but it works). Is this a driver issue? Anything I can do apart from move my wireless router?
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Oct 29, 2010
Getting an error while connecting to remote desktop using rdesktop.
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