Ubuntu Networking :: Intermittent Internet On 10.10 Server With Desktop

Dec 30, 2010

I have been running 10.10 server with no GUI for a few months without issue. I decided to install ubuntu desktop (GUI), because I want to turn it into a media server, and I'm finding that my Internet browsing fails intermittently. i.e. I can get [URL] sometimes and sometimes not. I have tried traceroute and found that I do not reach my local router on addresses that fail, and yet I get a full trace on addresses that are ok. Ping tests too.I remember from some time ago that the GUI may cause a network problem but I'm not sure.
By the way, other computers on the network can access this host through Samba so the NIC is working fine.

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Ubuntu Networking :: Intermittent Internet On Wireless/wifi - 10.10 Disconnects Repeatedly?

Dec 31, 2010

I just upgraded to Ubuntu 10.10 because I was facing internet problems with previous Ubuntu 9.04 after I upgraded it with downloaded software. And now, 10.10 connects to wireless, but shows web-page some-times and repeatedly disconnects. Earlier it wasn't reaching Internet at all. Some of the topics here helped a lot. But this intermittent internet seems not going anywhere. Wired Internet connects easily though.

I've tried :-

-disabling ipv6..... first in Firefox, then in Kernel also
-Setting DNS.....System> Preferences> Network Connections
-setting static Ip

The system still gives trouble.

My system is Asus UL20A.
Wireless:-Atheros AR9285

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Networking :: Intermittent Internet Connection After Setting Up Load Balancer ?

Feb 25, 2011

I have set up one of my linux box as link load balancer for two ADSL connection. After deployment, I have found out that instead of being fast, it has become slow. What I have observed that my request get out to internet but comes back intermittently. Is this a standard scenario ?

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Ubuntu Networking :: Intermittent Internet Connection - Freezes And Doesn't Receive Few Packets

Mar 31, 2010

I'm having problems with my internet connection; it seems to be working fine then every other click of a page there is no connection, then I click it again a second later and it works. I am using a wired network connection plugged into an addon wireless router.

When I use ping under network tools it seems to be fine, then freezes halfway through and doesn't receive those few packets, giving me a transmission percentage of about 70%.

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General :: Distorted Sound / Intermittent Slow Internet On Feodra & Ubuntu

Nov 30, 2010

I have a core i7 machine on which I have dual booted Ubuntu 10.10 and Fedora 14. I am facing a weird problem on both the Linux distributions. Currently, I am facing three major problems which are causing me to use my laptop instead of this machine.Most of the times the sound gets distorted ( like the tempo is very slow and some cracks), but some other times it just works fine. ( I experienced this on both Ubuntu and Fedora)Internet at times is very fast and works great, but suddenly it slows down and takes a whole lot time to load. sometimes it just never gets fast.The low resolution flash videos, gets this very weird high pitch sound

Also, I noticed ( I don't think there is a relation between the two or is there?) that whenever the internet is slow, the sound is also distorted and when internet is fast sound works great.The intermittent nature of the problem is making it difficult to debug.

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General :: Intermittent Internet With Ubuntu Natty - Connections To Particular Websites Will Start Timing Out

Aug 28, 2011

I'm having a bit of Internet trouble with a fresh install of Ubuntu Natty and I haven't been able to track down the problem. I have my desktop running over a wireless network, which connects without fail. Somewhat frequently, however, connections to particular websites will start timing out (google, facebook, stackoverflow, us ubuntu archive, etc.). I'm also having a strange issue where my home page [URL] is redirecting to [URL].

Initially I thought it might be an issue with Comcast DNS, so I updated the router to use OpenDns servers. When that didn't work I started to try accessing some of the problematic sites through my laptop (which is using the same router) and they all connect without problem. The issue seems to be with my Ubuntu install, but I'm not sure where to look.

EDIT After doing some further digging, this is starting to look like a DNS issue. My home page appears the resolve to an incorrect ip address when the redirect issue occurs. Still not sure how to track down the problem, however.

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Ubuntu Networking :: No Internet Desktop 10.04?

May 20, 2010

I have always been a mac user and a couple of days ago I decided try ubuntu. My first step into ubuntu was the installation of Ubuntu Desktop 10.04 LTS on an desktop computer. Everything went smooth until I tried to connect to internet and I wasn't able. The thing is that the network is working fine, because I'm connected to it from my mac and other windows users too. I already tried everything without success. I have two dlink routers connected via cable, and only one has DHCP enabled. I'm trying to connect to the one that has the DHCP disabled via cable. I already try static ip configuration. I really would like to install ubuntu on both computers the desktop one and my mac, but I need to solve the internet issue first.

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Ubuntu Networking :: Desktop Cannot Connect To Internet?

Feb 19, 2011

Ubuntu cannot detect internet.My internet connects to my wireless router, which connects to my PC with Ubuntu installed.The "PC" light on the modem is blinking, which means the connection to the PC isn't right.The wifi WORKS throughout the house. Also my laptop can detect the wifi internet and I can go online.Only the desktop (with Ubuntu) cannot connect to internet. It WAS working fine yesterday.

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Networking :: Get Internet Access On Desktop Computer Through Networking?

Sep 10, 2010

I'm not really a newbee in Linux but I am a newbee in networking. I have both a Ubuntu laptop and a Gentoo desktop computer. I have just bought me the MBR1000 Cradlepoint router and it works great with my Verizon USB 760 modem plugged in it. I can now send and receive email on my Ubuntu laptop. I like it.My Gentoo desktop computer is just sitting there with no Internet access because my Verizon modem is no longer plugged into it but plugged into the router instead. Only my laptop now has Internet access. The laptop has an integrated wireless card built in the MB but my desktop has no such capability.

Is there a way (besides buying a wi-fi adapter) to get Internet access on my desktop computer through networking so that the router would give both computers Internet access at the same? My Gentoo desktop does have an ethernet adapter that perhaps I could useThe router has several LAN ports and one WAN port, both unused.

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General :: Internet Gateway (Server Or Desktop Editions)

Jul 2, 2009

I haven't worked with linux before, I am a network administrator, mostly working with cisco routers and windows 2003 server configured with ISA, I want to shift to linux, since its a free OS, offers more than windows 2003 server, and I have the time and resources to test it at my work place, I want to give it a try. Now ... this is what I want:

I want to use Linux OS (server or desktop editions) as Internet Gateway, I have less than 50 hosts (internet users) on my network, and I simply want to know what is the most convenient linuxs distro for me to work with as a beginner to install, configure and administrating a linux OS(working as an Internet Gateway).

Its a simple network, 50 users connected to a switch, the switch to a server (where I will run the linux OS), the server to a cisco router, the router to the internet line. (Any tips on what do I need to be able to configure firewall rules and user activity monitoring like I am used to do with ISA on windows server 2003).

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Ubuntu Networking :: Intermittent - DSN Fails While Browsing

Mar 12, 2010

Every so often while browsing, DSN fails. The thing is that if I DIG the address at the command prompt the site immediatly pops in in Firefox. what I should do to diagnose the problem.

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Ubuntu Networking :: 9.10 Desktop 64bit Will Not Connect To Internet

Apr 13, 2010

I just installed 9.10 -64bit on my desktop. I am still trying to connect to the internet. I have my desktop linked to my asus router via ethernet cable and then the router is linked to my cable modem via ethernet cable.
9.10 desktop >> asus router >> cable modem

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Ubuntu Networking :: Using Laptop To Give Internet To Desktop?

May 17, 2010

I have a laptop running Ubuntu 10.04 with wireless working out of the box. I've been using it for the past few weeks because my iMac G5 has really slowed down with OS X. Today I installed 10.04 on the iMac G5 as well. However, wireless isn't working out of the box as it asks me to install the Broadcom wireless driver. The problem is, without this wireless driver, I can't install the drivers.

I am wondering if I can connect the laptop, which has wireless, to the iMac with a spare ethernet cable to give the iMac internet so it can download the driver.I'd rather not have to unplug it and move it downstairs to the router just to install the drivers.

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Ubuntu Networking :: Can't Connect To Internet With Desktop Version?

Jan 17, 2011

I have some problem with my network, i can't connect to Internet with Ubuntu desktop version. I'm using my network cable but cant seem to get Internet.give useless information but don't know what to give you.

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Ubuntu Networking :: How To Diagnose Intermittent Wireless Connectivity

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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Ubuntu Networking :: Desktop Internet Randomly Stops Working?

Mar 2, 2011

Not sure if I've listed the specs of this machine before, so I'll do it again. 'm running an HP Pavilion 760n with 512MB of RAM and (I think?) a Pentium III processor... not sure on that one right now. It's currently running a laptop version of Ubuntu 10.04.I went to log into my online classes tonight only to find that the computer wasn't responding at all. I did a hot shutdown and restarted it, and now the system isn't detecting the internet connection at all. It should be noted that the connection was working perfectly fine earlier today, perhaps 6 or 7 hours ago.I know it's something to do with my computer and not my router, as I'm on my wireless network from a Windows 7 laptop and it's connecting just fine.

In viewing another thread,..lems+-wireless, I found a bunch of commands that it was said would be helpful diagnosing this issue. That said, below is the output of all the commands that I could think of.

Sudo ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:e0:18:5c:45:7a
inet addr:192.168.2.1 Bcast:192.168.2.255 Mask:255.255.255.0

[code]...

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Ubuntu Networking :: Intermittent Wireless Broadband Connection Recognition?

Mar 27, 2010

Using my usb mobile broadband dongle I am able to access the internet about 25% of the time. I am able to make a connection to the '3' wireless network 100% of the time, but often Mozilla and all other applications that rely on an internet connection do not recognise that this connection has been successfully established, and give me error messages claiming there is no internet connection.

I can't discern any pattern as to whether the connection will be recognised or not. When it isn't recognised, the only solution is to disconnect and reconnect to the network. Sometimes this works and sometimes it doesn't. Sometimes restarting the computer fixes the problem, and sometimes it doesn't. I also have access to a wireless network at uni. I have no problems using this network whatsoever. Housemates using the same dongle on Windows have no problems. I'm using an Acer Aspire one, the dongle is a Huawei e220, I'm running Ubuntu 9.10. I have only recently reinstalled the operating system and have not needed to mess around with any network settings to get the usb dongle to 'work' the way it is currently.

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Ubuntu Networking :: Intermittent Connectivity Using Huawei E 1550 USB Modem On 10.4

Aug 18, 2010

I have a Huawei E 1550 USB stick modem and I'm trying to consistently get it working with Ubuntu 10.4. Using usb_modeswitch and wvdial I've got the device recognized as both a modem and disk drive and it seems to be working okay. wvdial usually is able to find the modem and connect and I can get online no problem. That's the good part.

However, after some amount of time (sometimes just a few minutes, sometimes hours, but it always eventually happens) the modem stops working and gets into a state where when I run wvdial it keeps looping and failing with:

Code:

ATDT*99#
NO CARRIER
--> No Carrier! Trying again.
--> Sending: ATDT*99#

[code].....

Interestingly enough, when it's in this state I am still able to access the modem, and via AT commands am able to see that it has signal, can make phone calls, and can send SMS messages! It just can't seem to dial a data connection. Now, unplugging and plugging the modem back in almost always seems to solve this problem, only for it to fail randomly at some undetermined point in the future.

Why can't I just keep unplugging and replugging the modem, you ask? Because the computers (yes there are currently 9 computers and modems I need this to work on) are being deployed to clinics and offices in rural Africa where they will be locked in a box so they aren't stolen. I have pursued ways to shutdown power to the USB port in order to "fake" a hard pull of the cord in software, but haven't been successful so far. I've also tried reading as much as I can on the NO CARRIER response, but so far it's not turned anything up.

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Ubuntu Networking :: Intermittent Wireless With Atheros AR5001X+ On Lucid?

Sep 12, 2010

I have an old Tatung tablet pc, with touchscreen, stupid speakers and an atheros wifi card (AR5001X+). With XP, everything works reasonably well, and wifi connectivity is rock solid. I know I'm asking for trouble installing *nix on this machine, but if the wireless worked, I'd be happy. However... With an updated Lucid install, I can see and connect to open, WEP, and WPA(1/2/tkip/aes/whatever) networks. I get good speeds with every network I've tried, but after a minute or two, my connection speed drops to zero, only to recover after another few minutes. A few minutes later, the wireless dies again, then reconnects....

Both the router and the tablet show that I still have a connection, and the connection speed recorded by both does not change from the 'working' condition. I get nothing in the logs (router or tablet) and no indication (aside from transfers stalling) that there's any problem. The 'network history' part of Gnome system monitor shows the data rate dropping to zero, but a network monitor applet on the gnome panel shows transmissions and (later) recieves. Reported signal strength remains constant, and seems to have no bearing on the frequency or length of the dropouts.

I've tried the stock lucid drivers, the lucid wireless backports, and madwifi (currently on madwifi) with no change to symptoms. I did think that it may be to do with scanning for networks (iwevent showed completed scans as the dropouts ended) so I removed network manager and tried static configuration with /etc/network/interfaces . The problems persited (although iwevent is now silent) and I am now using Wicd with no change.

lscpi:

Code:

sudo lspci
00:00.0 Host bridge: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02)
00:00.1 System peripheral: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller (rev 02)

[code]....

I see nothing toobad in these, so I ran a longer test - I bash'd a while loop to ping the router, run ifconfig and iwconfig, and spit the results into files. I concurrently ran a wireshark capture. All of these contain a lot of text/data, so I've attached them here. I can't see any connection between the output of ifconfig/iwconfig/wireshark while the ping drops, but I'm no expert.

[URL]

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Ubuntu Networking :: Wireless Exclamation Mark And Intermittent Disconnectivity?

Oct 21, 2010

I got a NetGear wireless router recently. Attached it to my Huawei (pardon the spelling) modem. I have a HP 540 laptop running Ubuntu 10.04 The wireless gets connected. But there's an exclamation mark almost all the time. Very frequently these days, the connection gets bogged down or websites just don't open at all. But the icon (with the exclamation mark) shows Active Connection. I don't know where to start looking for bugs. Seems odd. Wireless is connected, I can connect to sites, but there's the exclamation.. and sooner or later, connection goes off but the icon still stays the same with "active" label.

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Ubuntu Networking :: Intermittent Connection With RTL8192E In Samsung N150?

Nov 7, 2010

I've got UNE 10.10 installed on a Samsung N150 that uses the RTL8192E for wireless. When the wireless works then it generally works okay, but I'm having problems with reboots and long-running connections. This is different to the mass of posts (mainly from 2009) about the card not working at all, so I started a new thread.Basically, 90%+ of cold boots result in a successful wireless connection, with Network Manager remembering my WPA password.

When the wireless is up then it never obviously drops out, but I've got an app with a long-running connection that seems to disconnect itself occasionally. Looking at Wireshark then it appears that there are a number of retransmits, and a big batch just before it disconnects (which implies that the app is dropping its connection because it thinks the other end disappeared). Running the app on another machine with a different card but through the same release of Ubuntu and the app and the same router doesn't result in retries or drop-outs.On the times when a cold boot doesn't successfully reconnect then it asks for the WPA password, then continues trying, then asks for the WPA password again, then continues trying, then asks...and so on until I rmmod and modprobe the driver.

I originally had problems with the machine refusing to restore after a hibernate/suspend, but this was solved by a tip to rmmod the driver on hibernate/suspend and modprobe it on restore.The wireless will now work okay on some restores, but is more likely to repeat the behaviour described above for the failed cold boot.

Code:
$ lspci -nn
...
05:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8192E Wireless LAN Controller [10ec:8192] (rev 01)[code]....

Attached is a file with some snippets from dmesg around the time of the wireless failure, and the log of what it does after a remove and re-add for comparison of the "correct" messages.

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Ubuntu Networking :: Intermittent Connectivity - Wired Router (WRT54g2)

Nov 10, 2010

To be brief, I am having intermittent connectivity issues with a wired connection to a WRT54G2 router. I have no such issues if I am plugged straight into the modem. My wireless persists throughout the outages and they usually require me to restart the interface on my machine. I have used Wicd Network Manager and Ubuntu's out-of-the-box Network Manager.

hostname -rs
Code:
Linux 2.6.32-25-generic
ifconfig eth0 .....

Capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
Configuration: autonegotiation=on broadcast=yes driver=e100 driverversion=3.5.24-k2-NAPI duplex=half firmware=N/A latency=32 link=no maxlatency=56 mingnt=8 multicast=yes port=MII speed=10MB/s
Resources: irq:20 memory:feafe000-feafefff ioport:ac00(size=64)
No errors in dmesg.

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Ubuntu Networking :: Connect To My Home Desktop's Internet From Behind Firewalled Computer

Nov 1, 2010

I am going to a country with government managed firewalls. How can I connect to my home computer's (Ubuntu 10.04) internet connection from a computer behind these firewalls?

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Ubuntu Networking :: Possible To Connect Desktop To Internet / By Connecting It To Laptop With Cable?

Jan 11, 2011

I have an old desktop computer that I installed Ubuntu 10.04 on. I also have a laptop with Windows 7 Pro which is connected wirelessly to the internet. The desktop does not have a wireless card and the modem is in another room. I have a spare ethernet cable, is it possible to connect the Ubuntu desktop to the internet by connecting it to the laptop with the cable? I'm not very good with computers.If this isn't possible, how would I go about connecting the desktop to the internet?

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Ubuntu Networking :: Slow/intermittent Connection On Linksys Wmp600n - Wubi 10.10

Oct 28, 2010

i have just installed 10.10 under wubi, first time trying to use this network card under ubuntu. works fine on XP where it connects with good signal strength to a zyxel p-600 b/g router (my 3 other machines also connect fine to this router)

i am using WPA2, it takes 30secs to 1min to connect in the first place, then runs slowly and with intermittent disconnects, reports good signal strength in network manager.

i have been fortunate enough to have 3 machines that run ubuntu flawlessly out of the box..

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Ubuntu Networking :: Using PC As A Router To Share Internet: Laptop Connects But Desktop PC Doesn't

Oct 15, 2010

Since I have 3 Network cards in my Desktop PC I've configured it to act as a Router using GNU/Linux Ubuntu Lucid in combination with Samba so I could share my internet connection. It works on any laptop a connect to it using any of the network cards ports [regardless of the operating system installed on the Laptops], but when I plug that same network cable to any Desktop PC [regardless of the operating System installed] it doesn't even light the LED in the netcards. From the Client PC seems like nothing is plugged in the the netcards.

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Fedora Networking :: Intermittent Mobile Broadband Connection Just Goes Off Without Doing Anything

Apr 3, 2011

In the last week I have noticed that sometimes my Mobile Broadband connection just goes off without me doing anything! I have credit on the dongle account, so it isn't that. I'm using fedora 14 on an acer aspire one netbook. Dongle is a Huawei E160 on o2 here in the UK Kernel is 2.6.35.11-83.i686.fc14

Sometimes unplugging and replugging the usb dongle works. Othertimes, I have to leave it out for several hours. It does seem to happen daily, though.

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Networking :: Sharing Internet Connection - Using My Desktop As A Wifi Hotspot

Dec 27, 2010

I have two computers:
- one is my desktop, running ubuntu. it has two NIC's one is wired (eth0), the other is wireless (wlan0).
- the other is my laptop, running archlinux. two NIC's as well (eth & wlan).

I would like to connect my desktop to my router via eth0 and connect my laptop to my desktop via wlan0, providing internet access to my laptop. i would like both computers to be able to use the internet simultaneously (not all packets would be forwarded).

Any manner of doing this would be ok, but if this is a simple enough task to do it by simply configuring some files (e.g. /etc files) rather than installing some unnecessarily big application, then that would be wonderful!

Also, not really as high a priority but if possible, i would like this to perhaps not be limited to my laptop. connecting any device (a psp or pda for example) to the internet this way (making it a hotspot in a sense) would be super! encrypting the connection (WEP for instance) would be ultra-mega!

Miscellaneous info:my desktop uses dhcp to connect to the router.

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Ubuntu Networking :: DNS Died - Karmic Desktop Stopped Connecting To The Internet (Firefox & Evolution)

Apr 1, 2010

This morning my Karmic desktop stopped connecting to the internet (Firefox & Evolution). Network is all ok and other machines can connect fine - in fact I am typing this from a Windows 7 virtualbox running on the offending machine. Investigation shows that this is definitely a DNS problem as I can connect to sites / mailservers by using the ip address. Have tried several reboots which did not help. PowerDNS is installed. When I restart it the ff output is send to syslog:

[Code]...

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Networking :: Windows 7 Intermittent - Resolving Host Aliases Against BIND 9.6.2?

Jan 15, 2011

I have a Windows 7 professional x64 pc that intermittently fails to resolve host aliases. The nameserver is a Fedora 11 system running bind 9.6.2-p2. Its cannonical name is trixter.intranet.org, and it serves several web sites, each with a different host alias: hg.intranet.org, svn.intranet.org, bugzilla.intranet.org, etc.

Occasionally, the Windows pc will be unable to find any of the aliased hosts, even when it can find the canonical name. The aliases will be un-resolvable for a period of several minutes, and then, with no intervention, they can be found again. Trixter can always resolve the aliases to itself.

Even stranger, when I use Cygwin from the problematic Windows 7 PC, it CAN resolve the hosts. I can ping hg.intranet.org from a Cygwin shell, but not from a cmd.exe window. Administrator privileges make no difference.

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