Ubuntu Networking :: SSH & HTTP Unable To Connect?
Mar 23, 2011
I have an Ubuntu 10.10 machine hosting a virtual Windows machine on virtualbox. I have 3 servers I connect to using SSH with password authentication, on standard port (22)For some unknown reason, I have one server that I cannot connect to Via SSH using putty/terminal or HTTP via Browser from my Host nix box, but my Virtual machine CAN connect via both. Same machine, same network, one virtual with a bridged adapter, one physical network card connected to my network.
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Aug 6, 2009
I have Fedora 11 and have successfully set up VNC so that I can connect within the network (direct using vnc client/server setup). I am in the middle of working on a problem and have a fried who is in another city and was trying to set up VNC so that he could connect via http, which I know is possible (that it listens on range 5800 + the display number - mine is 3 in this instance). For the life of me I cannot get the java http viewer to work, here is what I have done so far: My vncservers file:
[Code]...
My router is set up to forward incoming requests on the range 5900-5910 and 5800-5800 to this computer. I have opened ports 5902, 5903, 5802, and 5803 on my linux firewall. So far as I know, this is all that is necessary..well. Whenever I attempt to connect via [URL]:5803 I get a time out error. What could be wrong?
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Aug 14, 2010
How do Http requests and responses go from a client to the server? IS a TCP Connect Tunnel always formed or is there some different mode ?
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May 16, 2010
I'm trying to set up a server for an NPO who connects to the Internet through an internal proxy (Websense). I can't access the Internet unless through the proxy.
Since it's a server I did not install a GUI so I'm wondering how to connect the new server to said proxy server. I have the IP address, port number and username-password for the proxy server. The new server has a static IP address and is ready too go!
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Aug 2, 2011
In ubuntu 10.04 LTS I am currently unable to access the location http://192.168.1.1 I have accessed it earlier. This is necessary for modem configuration. I am at a loss why this is inaccessible at present. Can anybody please advise what to do? I am configuring firewall but I doubt if that has anything to do with my problem. Or in case this may be due to faulty firewall configuration, please indicate denial of possible service/program which may cause this. Also ping 192.168.1.1 reports 100% packet loss.
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Nov 23, 2010
I have a really weird (but consistent) problem with my Kubuntu 10.10 install: I cannot post some HTTP forms.
First off, this is a client PC problem. My squirrelmail on the server works fine. I just use squirrelmail 1.4.17 to troubleshoot the ubuntu desktop problem
I used an old (07.04) Ubuntu install which worked fine. Then I wiped the disk and installed Kubuntu 10.10 on the same hardware. Everything works but **some** HTTP post does not work (I can log in but not send mail or save draft). I noticed I cannot log in to Yahoo, for example.
My webhosting account can display the apache access_log. When I hit the <Send> button the POST request never arrives to the web server.
I use a router (Dlink DL-604) behind a DSL modem and ooma box. There is a Windows 7 PC and a Kubuntu PC connected to the router. I can use squirrelmail just fine from the Windows PC.
I tried several steps:
- reinstalled Kubuntu
- installed Firefox and Chromium (on top of reconq)
- ran from a CD on my other (Windows 7) PC
- installed Wireshark and compared the traffic (but was unable to pinpoint a problem)
The result was the same: the <Send> button just keeps waiting; the POST request never makes it to the web server.
This sounds (and is) scary and suspect. The fact that the "demo" Kubuntu install (from the CD on my other Windows PC) using the reconq exhibits the same problem on a totally different hardware leads me to believe this may be related to Kubuntu. For example, I had to type this very message on the Windows PC as I could not post it on the forum from my Kubuntu box.
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Sep 27, 2010
Using netcat, nc(1), craft a valid http/1.1 request for getting http headers (not the html file itself!) for the main index page of www dot aalto dot fi. What request method did you use? Which headers did you need to send to the server? What was the status code for the request? Which headers did the server return? Explain the purpose of each header.
nc -v www dot aalto dot fi 8080
HEAD / HTML/1.1
host: www dot aalto dot fi
And it returns:
200 OK
Content-Length: 858
Content-Type: text/html
Last-Modified: Thu, 02 Sep 2010 12:46:01 GMT
[Code]....
I really don't know what does it mean. Question 2: Using netcat, nc(1), start a bogus web server listening on the loopback interface port 8080. Verify with netstat(, that the server really is listening where it should be. Direct your browser to the bogus server and capture the User-Agent: header "Direct your browser to the bogus server and capture the User-Agent: header" I don't understand this question.
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Nov 2, 2010
I am unable to connect to wireless network in ubuntu 10.10.i have noticed that the iwlagn driver isnt been used by anything.
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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.
[Code]....
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Jul 27, 2010
I just switched from Ubuntu to Fedora 13 because I was unable to get Ubuntu to connect to wireless networks. I tried everything suggested in help and forums, and kept getting "Bad Password" with WICD and Network Manager. Now, with Fedora...I still can't connect.
Problem #1: The guide says to "...make sure that the relevant wireless interface (usually eth0 or eth1) is controlled by NetworkManager," and that I do this via: System>Administration>Network
However, there is no Network option under System>Administration.
Problem #2: I open Network Manager, which displays a list of networks. I click on mine, configure it with WPA and the right password, and it fails to connect: "The network connection has been disconnected."
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Jan 11, 2010
I have come across a fairly minor issue however. When using any IM clients I am unable to login to MSN using the direct connection method. Instead I find myself having to connect using the HTTP method. I wouldn't worry about this except many of my contacts are complaining that they are getting "message unabled to be delivered" errors regularly when trying to contact me.
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Dec 16, 2010
I'm using the Netopia 2247 router. I'm on Fedora 13, on a Thinkpad T60.
For some reason, ever since I switched my ISP (just last night), I can't connect to any non-HTTP services. I've tried Thunderbird for IMAP, FileZilla for FTP/SFTP, and Empathy for XMPP. Nothing connects. Chromium, Firefox for HTTP: works just fine. I know it seems really far stretched to think that this could be an issue on my end, but: I've checked with the ISP, and they insist that there's no reason this should be happening. They will be coming in tomorrow to take a look at wiring and all that though. I'm able to access my IMAP email via my smartphone's built-in mail client, via my new ISP. This is using a Nokia N82, with default messaging client (just called Messaging). But, who knows, maybe N82's email client actually uses HTTP? (Unfortunately, my only "desktop" computer is T60, and I only have Fedora installed on it; I realize the icon at top right shows Windows, but that's my work desktop, and I definitely can't take that home for testing). I've checked the firewall settings on the router, and put them at the very lowest setting.
Again, I know it seems far fetched that there's something wrong with my system (e.g., I've traveled with my laptop and have never had any problem accessing IMAP or FTP on other connections), but I just want to make sure I've exhausted every possibility. So, if you could entertain the possibility that it's something on my end, what might it be?
Maybe disabling SELinux might help? I'm going to try that when I get back home. Although: I feel like an SELinux dialog would've popped up if that was the problem.
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Dec 29, 2010
I was having no problems (that I knew of) browsing the web since installing Ubuntu 10.10 a week or so ago. I was previously trialling Win7 as my customers will likely be using that in the future. Then I wanted to go to internode.on.net. Got the following: Quote: Firefox can't establish a connection to the server at internode.on.net. or Quote: Oops! Google Chrome could not connect to internode.on.net
As it was just after Christmas I thought it must be down, for upgrades or maintenance etc. I later tried to go to Freebsd.org; same error. I've been having a small number of other websites give the same error. I thought nothing of this until I tried it on my wife's macpro. I could log onto all the websites I wanted to and none gave any indication of having been down. Both boxes are on the same adsl connection. I still can't access internode or freebsd on 10.10 yet have been able to access every website on OSX. Now, I was only looking at them for info but am worried I won't be able to access something important. (so far everything I 'need' is working)
ping just drops out. edit: weirdest thing! I just retried and now can not emulate the problem for internode. freebsd still won't show. that is less than five minutes between problems and resolution! I hadn't even posted! But I still would like to have an idea of what is going on. Here is the ping error for freebsd: Quote:
[Code]...
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Jul 14, 2010
I have Karmic Koala and together with my neighbours we have a W-LAN which I was always using without problems. Now, a couple of weeks ago, my neighbour has changed the password to this W-LAN and since then ubuntu is unable to connect. The network is being recognized, but after the request to unlock a key for the network manager (besides, how can I unlock it once for all?) there comes the window with the request for the network-password, after typing it (correctly), nothing happens. The request for the password comes two more times and then ubuntu states that it is unable to connect.
- We have changed the password again - didn't help
- On Windows I and my neighbours get the connection
- My Ubuntu is able to connect to all other W-LANs
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Nov 16, 2010
I have an Ubuntu server dedicated to running an openVPN server on my VMware ESX 4 host. On my Windows clients I am able to connect to the VPN; however, on my Ubuntu 10.10 workstation I am unable to connect. Here is what I have done. I have network-manager-openvpn and dependices installed as well as the openvpn package. When I hit the add button in the network manager for VPNs, I fill out all the needed information, but am unable to hi the apply button. I have also tried using the openVPN method for connecting. I download the client.ovpn file from the VPN server, and issue the following command:
Code:
openvpn --config client.ovpn
It asks me for the authentication user and its password and produces this:
Code:
Mon Nov 15 21:37:20 2010 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Mon Nov 15 21:37:20 2010 Control Channel Authentication: tls-auth using INLINE static key file
Mon Nov 15 21:37:20 2010 Outgoing Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
[code]....
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Mar 24, 2010
When I run sudo apt-get update I get the following message at the bottom:
[Code]....
I have tried numerous ways to add the keys i.e: gpg --keyserver keyserver.ubuntu.com --recv-keys EF4186FE247510BE && gpg --export --armor EF4186FE247510BE | sudo apt-key add - However, I then get the following message:
[Code]....
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Apr 25, 2010
My box has to connect to internet using specified http proxy.I have set proxy in both kde control center and yast2 control center. They both tell me the proxy works fine. But when I really try to use yast2 to update my system, it report an error:
Code:
Failed to download ./repo/repoindex.xml from [URL]
History: - [AbstractCommand.cc:195] URI = [URL]
Even I try
Code:
export http_proxy=http://XXXX
yast in command line,the error still exist.
In debian apt-get and slackware slackpkg,my proxy works fine. So I am sure it is not my fault and maybe it is a bug of yast2.
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Apr 16, 2010
I see the network applet in the panel which shows that I am connected but I cannot access the net. I found out that I had to do this in firefox
about:config --> IPv6 --> disable.IPv6 true
With this tweak I was able to connect to the net. But when I use the Update Manager or Synaptic I am not getting connected, even if I use the cli and do
Code:
apt-get update: I cannot connect. When I do
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Apr 20, 2010
First off, I should state that I am still using Hardy. I realize that it is many versions from the current release, but my schedule is full and provides little time to ring out a new distro and considering the nature of my problem I don't see much need.
The problem is that I cannot connect to my WPA home network. The wireless card is working because I can connect to any WEP network and before upgrading to Hardy I could connect, although not at first.
Have recently installed WICD which has not helped. WICD tries to connect but reports that it cannot obtain and IP address. Network Manager did not report anything but did seem to translate the password into an encrypted key (saw posts relating to this before but no obvious fix) Since switching to WICD I have not had the opportunity to test connection to a WEP network.
I do not wish to change the security of my home network to accommodate the operating system.
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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]
[code]....
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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Aug 14, 2010
I just dual-booted my Acer Aspire 3810TZ laptop with Ubuntu 10.04. When I first tried to connect to my home wireless network, it connected fine. However, now whenever I start the laptop, it will not connect. The network appears in the available networks list, but it fails to connect. I know the network is ok, because I can still connect to it fine from Windows.
My network adapter is Intel Wifi 1000 BGN. Apparently (from [URL]) the drivers for this card should be part of the distribution.
I can't understand why it connected once, but (without any changes to the system at all) it won't work now.
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Aug 19, 2010
I'm a first time Ubuntu user and I just installled it more out of curiosity than anything else so I don't know jack abiut linux just that people say it's better.
Anyway I have a Dell Inspiron 1526 laptop and I'm unable to connect to the wireless network. The router that we use is an Apple Airport Express device to connect.
I checked using the troubleshooting guide and this is what I got in the Terminal:
moofknock@moofknock-laptop:~$ sudo lshw -C network
[sudo] password for moofknock:
*-network
description: Network controller
[Code]....
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Oct 19, 2010
Unable to connect to vpn and along with my thinkpad I am frustrated, exhausted by multiple restart installed ubuntu 10.10 on Thinkpad-T410 64 bit
Steps
1. sudo apt-get install network-manager-vpnc
2. sudo apt-get remove resolvconf
3. Import .pcf
4. reboot
5. connect, enter password in password window
6. error "invalid VPN secrets"
also tried enabling/disabling Dead Peer Detection option but still no success
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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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May 12, 2011
The problem is wireless connections show up in the connections list but when I try to connect it will just keep trying to connect and will never actually complete. During the connecting process it will constantly ask for my WPA2 key. Wired connection does work but that is only a temporary fix to this problem. The phy0 wlan hard block is stuck to yes also, so that could be the problem.other info:Running Ubuntu 11.04 dual boot with windows vista 32 bitWireless card is Atheros ar5001 on Toshiba satellite laptop
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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
[Code]....
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Jun 5, 2011
Yesterday I tried to connect using my 3G, it has been working since I installed the computer more than a year ago.
When I try to connect I get the following in the syslog (and daemon.log)
Code:
Jun 5 10:50:21 ubuntu NetworkManager: <info> Activation (ttyUSB0) starting connection '3 Bredband'
Jun 5 10:50:21 ubuntu NetworkManager: <info> (ttyUSB0): device state change: 3 -> 4 (reason 0)
Jun 5 10:50:21 ubuntu NetworkManager: <info> Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled...
[Code]....
After alot of swearing ang scratching of the head I've resorted to trying this from i live cd, but with the same results. I know I've been able to connect using livecd before so I'm a bit worried that something might have happened with the hardware.
What I'm hoping for though is some way to determine that it is the sim-card and/or something on the operator side that is bork.
how to further pinpoint the issue? And/or troubleshoot the hardware? I should be able to send AT-commands directly to the modem, does anyone know how and/or the syntax for establishing the data connection?
EDIT: I'm using an Asus eee 901 with builtin 3G modem.
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Jun 22, 2011
I had this sticky problem with b43 drivers. Unfortunately, on my Acer Extensa 5620z I'm not even able to connect via ethernet, so I can't download upgrades, driver or whatever. This was initially with 11.04, so I've decided to get back to 10.04, but the problem persists. Then, here we go with details:
networking checked - is enabled.
Ip configuration (I've got static local address) - is ok.
Ifconfig - recognizes eth0.
Iwconfig - recognizes wlan0.
Ping - 100% packet loss, always.
dig - goes on timeout.
netstat -an - doesn't show any connection with external address.
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Jul 5, 2011
I recently installed and now my wireless Internet isn't working.have a Dell Inspiron 1545 laptop, with the 1397 wlan mini cardI have read through other threads, but I was unable to solve the problem I am having (Stated below).I just installed ALL updates available and plugged in my computer to connect to the Internet.Now the wireless option is there, and so is my network, but when I select it, nothing happens
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