Networking :: How To Diagnose VPN Connection Failure On Fedora 12
Jun 4, 2011
Using a set of instruction given to me, I was able to set up a Macintosh system running Mac OS X to successfully connect to a virtual private network.I then tried to adapt those same instruction to configure a system running Fedora Linux 12 on an Intel Core2 Duo system.However when I try to connect using the NetworkManager Applet, I get an error that saying the VPN connection failed, with no clear indication of what the actual problem is.What can I do to troubleshoot this problem and find out why the connection is failing?
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Feb 26, 2011
I can't connect internet using ADSL modem of bsnl.I am new user of linux(fedora8).To do so I go through system>administration>network configuration and trying to activate xdsl modem and ethernet but unfortunately ethernet does not seems though there is a ethernet card.Here it should be mention that in my windowsXP partion there is no problem for internet connection.so what can I do next?
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Jan 28, 2011
I use a free vpn connection service to avoid filtering in Windows xp but in my ubuntu 10.10 is not working , i checked the gateway and other properties a lot of time and there is nothing wrong.
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May 4, 2010
I use an ADSL connection which I 'dial' using the Network Manager. My laptop is connected to the modem through an ethernet cable.
The thing is the place where I stay is prone for power failure. So the modem goes out with the power. It comes back on within a minute when the power is restored but Network Manager doesn't seem to automatically re-establish the connection after it is lost once. I have to manually do it. Hence most of my downloads do not get done.
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May 21, 2010
One of the (many many) problems that I had with Ubuntu 10.4 was that I wasn't able to connect using a wired. It really came to me as a huge surprise, because that's a problem that I have never encountered. I had dealings with wireless-issues in the past. But never a wired connection failed. The thing is that we (in the dormitory where I live) had a network problem recently. A hardware piece got fried and we weren't able to replace it for about 3 weeks (go figure :X ). But in the past 3 days or so we're back online. The thing is - none of my neighbours (all of them are using Windows) has network issues now. Usually it was on the contrary - I was the one who had beautiful connection while they had to deal with a load of d@ng. That said - I made a fresh install of Ubuntu 9.10. The problem got resolved and I was as happy as a chick during her first wedding night with Don Goivanni in her bed. BUT after I updated (note - update and NOT upgrade) my system, I was suddenly unable to use the wired connection. The strange thing is that the NM says that I am connected AND I even get some short bursts of network traffic (last for 2-3 seconds) but usually not enough to load even a simple web page. Ping always returns 100% loss no matter how long the package burst lasts. I have slept this night for about 3 hours looking for a solution. None has been found so far. I don't have WAPs at home so wired connection is the only way for me to use this modern thing called internet.
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Jul 8, 2010
i have to install app server on VM of Linux box. am able to connect Linux box via puTTY and Xmanager as root user. but am not able to connect as a normal user. in Xmanager i see network error. In puTTY console gets disappear
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Sep 22, 2009
A recent yum -y update produced the same error on a half dozen boxes: --> Finished Dependency Resolution gnome-phone-manage 0.65-1.fc11.x86_64 from installed has depsolving problems --> Missing Dependency: libgnome-bluetooth.so.2()(64bit) is needed by package gnome-phone-manager-0.65-1.fc11.x86_64 (installed) Error: Missing Dependency: libgnome-bluetooth.so.2()(64bit) is needed by package gnome-phone-manager-0.65-1.fc11.x86_64 (installed) So I did the following:
[code]....
I am at a loss as to what the complaint is about. Everything appears to be in order and the application works just fine. Can anyone tell me what yum is complaining about?
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Jan 16, 2011
Just recently I've been having strange connectivity problems with my wireless network. The connection has previously worked fine and haven't had any problems with it. I haven't installed anything that would have affect it as far as I know. how do I go about testing the network to see where the problem lies? I'm running Ubuntu 10.10 with a Netgear WG111v2 wireless adapter and my guess is it is some strange configuration problem or a rogue application is eating up packets because the system works fine when I boot it up into Windows.
When I try to ping my router I'll usually get something like 98% packet loss. However in the output below, the network sprang to life half way through my pings so it went up to 63%. What other tools can I try to find out what's going on?
Code:
alex@obsidian:~/dev $ ifconfig
eth0 Link encap:Ethernet HWaddr 00:1a:4d:4e:03:3f
UP BROADCAST MULTICAST MTU:1500 Metric:1
[code]....
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Dec 23, 2010
Where does one look in terms of diagnostics after a system lockup and hard reset? For example, one of my computers, running Fedora 14 i686, has taken to locking up quite a bit lately. My only way out is a hard reset. Now, once the thing is booted back up I'd like to try to figure out where the problem lies. Where do I look? Will any of the log files reveal anything relevant to me? If so, what sort of things would I be looking for. Keywords?
This same box also locked up when I had Fedora 14 x86_64 installed. I had read that there were some issues with the newer 64 bit kernels that were causing lockups and / or extremely high loads. This is why I switched back to the 32 bit version, 2 days ago to be exact. The box gets little use. It's a toy really and not my main "daily use" computer. It is, however, running folding@home. Maybe that's where the problem is. About 15 minutes ago I called home and had my wife reset the box, then I logged in from work and stopped the folding service. I'll have to see if it locks up without folding running. Folding was running on this box when I had the 64 bit version installed also.
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Jun 21, 2009
I have installed Fedora 11 recently. I want to share my Internet connection.
I have e LAN connection eth0 which is connected to internet.
I have a Wireless connection wlan0.
I want to share my internet connection with wireless connection.
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Feb 28, 2010
After running a system update, on next boot I was unable to connect to the internet. I am running Fedora 12 KDE 4.4 x86_64 with a dsl connection. Network manager was keeping my ethernet card disabled. If I disabled NM control of the card I could manually enable it and connect to the internet, but on reboot it would be disabled again. I saw that the update did apply to NetworkManager so I did a downgrade. yum downgrade NetworkManager That seems to have fixed the problem.
Here's an interesting thing I noticed. When I did the downgrade, yum wanted to "Install" for dep NetworkManager-glib for the lower version, however didn't do anything to the same file on the latest version. Almost as if it wasn't installed. Now, with the downgraded version as current, yum wants to update both NetworkManager and NetworkManager-glib to the latest version. I couldn't swear to it, but I think the original update to NetworkManager did not include the *-glib dep, but now it does. Maybe that was the problem all along?
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Jan 12, 2011
I am running fedora 14 and have tried to setup VPN access to work. I used the simple networking GUI program. Another engineer at work uses ubuntu and that is how he accesses the VPN. I think that I did everything right but get this generic 'VPN connection failed' message. I am trying to connect to a monowall firewall and have the IP address. Yes, I have an account but am just trying it for the first time. I turned on all of the options available which seemed correct based on the instructions that I had. I have contacted my sys-admin to try to find out what the monowall doesn't like. However, I am wondering if I might need to open an outgoing port on my linksys home router/firewall and, if so, which one?
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Jan 19, 2011
I am using Linux operating system fedora 6 .Before today everything is going well. But today internet connection gets failed. It can not connect to the server for the internet connection. But in the same computer,installed windows operating system shows the internet connection.Please try to answer my question why the Linux operating system can not connect to the internet?
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Jun 29, 2010
I'm trying to configure postfix on an ubuntu virtual machine to use gmail as a relay client. For the past two days I have been in and out of the logs, changing parameters and blindly following tutorials but I can't get anything to work properly. So far I've narrowed my problems down to tls connection establishing and a failure to authenticate, judging by the local emails I've received from "The mail system".
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Jan 16, 2011
I just want to use Internet Connection Sharing (ICS) to connect to the internet. I have done a massive amount of troubleshooting, but some of it seems to contradict itself, and the only two things that I know for sure are that it used to work, and that my Ethernet cable is not the problem. When I use Terminal utilities like ifup and dhclient it seems that it can not determine IP information, but when I try to put it in manually, the "Apply" button grays out right after I finish typing it in. When I try to connect normally, in KDE or GNOME, the icon acts like it's connecting, then instead of having the connected icon, I receive a notification that "the network has been disconnected", and it goes back to the disconnected icon.
Oh, and by the way, I know that I could probably find a workaround, but I have limited resources, and this used to work. The Linux is a Dell desktop with Fedora 12 and the Windows is a Windows 7 HP laptop.EDIT: I hope that I didn't mess something up, but I accidentally used system-network-config to try putting in the IP address there, and ended up changing it back to the original settings, but the computer is now calling it Auto Ethernet in the taskbar icon, although sudo iwconfig in the terminal still calls it eth0.
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Mar 6, 2010
I have installed fedora 12 recently. after installation i tried to connect to the internet using BSNL broadband connection. I filled in the details such as IP, Netmask, Gateway and even DNS servers. In the services also I ensured that the network manager services is on. However even though my computer cannot connect to the internet. I then tried the ping test of the modem from the address 192.168.1.1 and found that the ping test is successful. Then i tried the network administrator and there I noticed something unusual.
There are two options in the devices eth0 and eth1 thats ok but the unusual; thing is that the Activate (green button), Deactivate (red button) and even the delete buttons are in the background and I cannot select them. Isthis the problem for the network connectivity.
[Code]....
I then tried the ping test of the modem from the address 192.168.1.1 and found that the ping test is successful. Then i tried the network administrator and there I noticed something unusual. There are two options in the devices eth0 and eth1 thats ok but the unusual; thing is that the Activate (green button), Deactivate (red button) and even the delete buttons are in the background and I cannot select them. Isthis the problem for the network connectivity.
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Apr 2, 2010
When trying to run MS Communicator 2007 in XP hosted by Ubuntu 9.10 using VirtualBox 3.1.6, the Communicator process inside the virtual image maxes out (90%+) and it becomes unusable (host reports VBox at 50% CPU). If I migrate that image to a Windows host, VBox does not show the same issue (Communicator process ranges from 20-35%). Creating a similar VMware image on the Ubuntu host and running it also does not show the issue (Communicator process ranges from 20-35%). So obviously there is some kind of bottleneck occurring with VBox on Ubuntu. My questions is, how do I figure out what that bottleneck is?
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Jan 18, 2010
My old custom PC is starting to die on me. Half the time the bios won't POST, and when it does beep and start to load, the system will freeze at random. It will freeze in bios settings, loading up the OS, or just whenever it wants to. Sooner or later I actually get the computer running, and it will freeze less and less frequently until it will be able to stay unfrozen for days as long as I don't reboot it. Rebooting the machine will usually start the whole freezing process all over again. Anyway, I want to learn how to figure out what is not working on my computer. I have been switching out RAM, PSUs, video cards, and bios settings to see if I could fix it, but nope. So how do I go about diagnosing this problem? I'm pretty much assuming it's a hardware one.
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Dec 6, 2010
How to connect bsnl 3g data card in fedora14. i tried with mobile broadband connection but it is not working
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Apr 12, 2010
i recently switched from slackware to debian because my laptop kept freezing up on slackware, and now it's doing the same on debian on slackware i would get this error in syslog: "hpet: compare register readback failed" at the exact time of lockup, which would leave me with a blinking capslock led indicator, and a completely frozen system (not even magic sysreq sequence would do anything) now on debian, same symptoms only there's nothing in syslog, and no blinking capslock led hardware is: i7 720q intel pm55 chipset nvidia gt 240m laptop model is lenovo ideapad y550p this will occur both in X and at the console i am using my own kernel as the default kernel doesn't support my ethernet adapter i have tried disabling hpet at boot, but there was no difference i have tried the patch posted here
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Feb 14, 2011
I've got an LG CD/DVD player/writer in my desktop, and it's suddenly stopped working. No error messages at all, but it doesn't acknowledge any discs any more, whether they're CDs or DVDs or CDRWs or anything. How can I diagnose what's wrong? It's only 1.5 years old so I wouldn't expect it to be a hardware problem really, but I can't think of anything else. At first I thought I'd broken something with Squeeze, but I ran a live system from USB stick and it also can't read any discs at all. Also I tried a bootable DVD and couldn't get that to boot either, so I'm pretty confident it's not a software problem. It's always worked fine before and hasn't had any shocks or moves or anything (that I know of). The green light flashes when I close the drawer, just flashes a few times and then stops. There's nothing in /var/log/messages. Are there any tricks to figure out what might be wrong or is it looking like I need to buy a replacement drive?
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Aug 3, 2010
I have tar files where I archive about 250 files, each about 80 Mb, without compression. In a few cases tar is only returning some of the files. For example, when doing an extract of the file using:
tar -xvf 356.tar
I got only 103 files, when it should return 255 files, but tar does not give me an error. Furthermore, the tar archive is 15.8 Gb while the extracted folder is just 6.4 Gb. The tar files were created using:
tar -cvf 356.tar 356
where 356 is the name of the folder. All the steps where done in the same machines, under Ubuntu 6 and newer. Any ideas if there is a way to recover the files that are not being extracted?
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May 30, 2010
The problem is random but reproducible: go to http://www.tvbythenumbers.com/, navigate around for a while, click some links...eventually firefox (3.6.3 on 10.04) will crash. I tried running firefox from the command line, but all it says is 'Segmentation fault' with no details. What can I do to diagnose this?
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Jun 26, 2010
I am struggling to get my wireless usb working on a fresh installation of Ubuntu Server 10.04, but it works just fine on a fresh install of Ubuntu Desktop 10.04. So I am trying to work out what's causing the discrepancy. I know the Server version is a "minimal install" of Ubuntu, so something must be missing that affects its overall abilities.
I am planning to compare the file system of a totally fresh Desktop version with a Server version - and would appreciate as much additional brain-power as possible to assist in the plan/execution of what I should be comparing. I hope this will throw up a solution as to what is NOT installed/configured on the Server version that prevents my wireless from working. [It will teach me a lot as well ] COMPARISON PLANAll programs installed on both file systems (looking for differences) Program differences which affect network setup and related hardware (I'm not sure of what this list should have on it) Related configuration files which might affect connectivity (same here - not sure what configures what at this stage)
* Do $lsmod to look for installed wireless drivers Miscellaneous tests
* Disable security on wireless router to see if security config is the cause I'm not sure if the kernel build will be different and if so how to establish this... but somehow wonder if this affects the outcome
If anyone is willing to assist in filling out the gaps in this plan I would really appreciate it. Or maybe there is a better way?
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Jan 18, 2011
How to diagnose a possibly failing harddisk. This is the system disk of a Windows XP machine that will not boot. It gets to the "progress bar" that runs across the screen a few times but then it always stops in the same spot. If I boot from a live Ubuntu CD what tools should I use to find out if the disk itself is failing? The disk is under warranty but if I take it to the shop and the problem turns out to be software errors then I have to pay so I want to be sure what is going on before going there..
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Apr 17, 2011
I am running Ubuntu 10.10 (amd64) on an Intel Atom 525 motherboard. I have a 5-bay SATA enclosure connected to my system through a Syba SD-SATA2-2E2I PCI card (uses the SIL3124 chipset). Under small to moderate load (transfer speed: ~25 Mb/sec), this setup works perfectly. Under heavy load (transfer speed: ~40 - 70 Mb/sec), the system crashes. By crash I mean I loose SSH connectivity, I can't ping the system, etc. The only solution is a hard reset. Initially, I thought this was a SAMBA problem so I logged into the system and tried doing a copy directly from the SATA enclosure to the system disk (connected directly to the motherboard). After 100 GB copied (at ~75 Mb/sec), the system crashed. My question: I am fairly new to Linux and Ubuntu. How would I go about diagnosing this problem?
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Jul 9, 2010
I downloaded bind 9 on my machine, but when I try to start the service "service named start" it fails. I found the logs by grep named /var/log/messages
Jul 8 22:10:49 localhost named[27072]: starting BIND 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 -u named -D -t /var/named/chroot
Jul 8 22:10:49 localhost named[27072]: adjusted limit on open files from 1024 to 1048576
Jul 8 22:10:49 localhost named[27072]: found 2 CPUs, using 2 worker threads
Jul 8 22:10:49 localhost named[27072]: using up to 4096 sockets
Jul 8 22:10:49 localhost named[27072]: loading configuration from '/etc/named.conf'
Jul 8 22:10:49 localhost named[27072]: using default UDP/IPv4 port range: [1024, 65535]
Jul 8 22:10:49 localhost named[27072]: using default UDP/IPv6 port range: [1024, 65535]
Jul 8 22:10:49 localhost named[27072]: listening on IPv4 interface lo, 127.0.0.1#53
Jul 8 22:10:49 localhost named[27072]: listening on IPv4 interface wlan0, 192.168.1.3#53
Jul 8 22:10:49 localhost named[27072]: command channel listening on 127.0.0.1#953
Jul 8 22:10:49 localhost named[27072]: command channel listening on ::1#953
Jul 8 22:10:49 localhost named[27072]: the working directory is not writable
Jul 8 22:10:49 localhost named[27072]: zone admin.myhost.remcycle.net/IN: loaded serial 2010070700
Jul 8 22:10:49 localhost named[27072]: zone admin.myhost.remcycle.net/IN: sending notifies (serial 2010070700)
Jul 8 22:10:49 localhost kernel: named[27073]: segfault at 00002aaaac0000d8 rip 00002aaaac0000d8 rsp 0000000040e78f58 error 15
I hear that "The working directory is not writable" is nothing to worry about and is just something that is complains about for no reason, but I can not decipher.
"Jul 8 22:10:49 localhost kernel: named[27073]: segfault at 00002aaaac0000d8 rip 00002aaaac0000d8 rsp 0000000040e78f58 error 15 "
I know segfault is having some memory problem at 00002aaaac0000d8 but does rip mean insertion point? What is rsp? Where do I find out what error 15 means?
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Aug 15, 2010
My F12 setup drops the network connection once or twice a day.
If I right-click on the tray icon and pick eth0 it comes right back.
Some relevant lines from /var/log/messages:
Code:
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Mar 29, 2010
does anybody know ho to sharing internet connection in fedora 12.what program should be installed and how to configure it.
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Sep 29, 2010
I installed F13 on a server with dual NICs. I configured both NICs into bonding lacp mode. I also removed the NetworkManager.
Everything seems to work fine, except I cannot connect to internet. I can connect to and from another machine through ssh. I have another server with the same type of networking configuration in FreeBSD working fine. The server is connected to a lacp supporting gigabit ethernet switch. The switch is connected to a router which goes to the modem.
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