Networking :: Vsftp Keeps Stalling / Trashing Wireless Connection

Feb 18, 2011

I have openSUSE installed on a laptop, and Debian on a workstation.They are linked via an unbranded British Telecom wireless homehub. The Debian workstation via physical ethernet wire, openSUSE lappy via wireless (NetworkManager).I have vsftpd running on Debian, which I can connect to from openSUSE fine, and begin to shift files. However after about a minute the wireless connection is lost, so the file transfer stalls. This happens every time I try, moving files in either direction.

I installed vsftp on openSUSE laptop and tried to use that as the server. The same thing happens; initially it works fine but after about a minute the wireless connection is lost again. I need to restart my wireless NIC each time to regain network connectivity.

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Ubuntu Networking :: Wireless - Lost It - 'wmaster0 No Wireless Extensions', But Then Refers To Wlan0 As The Wireless Connection

Mar 28, 2010

A friend who switched ISP's gave me his old Linksys WRT54-G wireless router. I went through the installation procedure and had a wireless connection up and running - smiley face. I had security set up for WPA, and decided to upgrade it to WPA2. Another smiley face. When I went to connect (had already done so successfully), I noticed it referred to my wireless as Linksys - I was expecting to see the SSID. So I started playing around in Network Manager and now I have things all effed up.

Don't know exactly what I did, but now I have no wireless. So I ran a few commands (lshw -C network, iwconfig, ifconfig, and iwlist scan), and looking at the results I see what appear to be inconsistencies in the output. I've posted them below, and make the following observations:

1. Under the lshw it refers to my wireless connection logical name as wmaster0, and has the correct MAC address, etc.

2. Under the iwconfig it says, 'wmaster0 no wireless extensions', but then refers to wlan0 as the wireless connection (although it does not seem to be running).

3. Under ifconfig I see both a wlan0 and a wlan0:avahi. The wlan0 has no IP, the wlan0:avahi does, but it is incorrect.

[Code]...

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Ubuntu Networking :: Internet Keeps Stalling Then Eventually Just Disconnects

Mar 13, 2010

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Jan 24, 2010

Its a case of ".... wireless network connection active but still not internet connection .."I am using WEP - 128 key ... Works when I connect directly using ethernet cable ... but not wireless (pci and wireless router)

ubuadmin@ubucomputer:~$ ifconfig

wlan0 Link encap:Ethernet HWaddr 00:06:25:12:83:3b
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::206:25ff:fe12:833b/64 Scope:Link[code].....

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Jun 21, 2009

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I have a Wireless connection wlan0.

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Ubuntu Networking :: No Wireless Connection Despite Being Told Connection Active?

Jun 11, 2011

My problem is exactly the same as [URL]

but I am stuck at the last hurdle

here are the output of the command that helped to solve the case in the previous post:

ifconfig wlan0
wlan0 Link encap:Ethernet HWaddr 00:1b:77:d2:59:55
inet6 addr: fe80::21b:77ff:fed2:5955/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0

[Code].....

I have also tried sudo dhclient but it hasn't helped and I am still unable to connect to the internet

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Feb 4, 2010

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Dec 21, 2010

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Mar 2, 2011

I'm afraid I have a huge issue with my newest Fedora 14 server. I recently migrated to Fedora 14 from Centos 5, which was very stable, but had ancient packages and libraries and my users were revolting...The machine is a HP ProLiant 360 G7, with 12G RAM and 6 SAS drives in RAID 5.After I migrated to Fedora 14, I noticed that for some reason, during the course of about 24 hours, all usable RAM "disappears" and applications are forced down to swap space. Needless to say I didn't have this issue on CentOS.

The server does heavy IO as per it's function (it's a heavily loaded file processing server and user simulation computing station among other things, which causes lots of random IO), so I thought it may be the cache, but then I realized it cannot be - because obviously Linux will use onyl "unused" RAM for caching and frees it up as soon as an app need it. Then, I thought to check the "slabtop" to see what's going on in Kernel memory. Unfortunately I don't have the screenshot from the time just before the latest crash, but there's a certain value displayed by slabtop, which slowly, byte-from-byte creeps over all available RAM, eventually forcing applications down to the swap. This is malloc-64, and as you can see from the bellow copy-paste, it's building up again even now...


Code:
Active / Total Objects (% used) : 9118075 / 9153600 (99.6%)
Active / Total Slabs (% used) : 152157 / 152157 (100.0%)

[code]...

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Apr 10, 2009

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Feb 4, 2011

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Oct 8, 2009

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Jan 1, 2010

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Jan 13, 2010

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Jan 15, 2010

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Jan 25, 2010

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Code:
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Jan 28, 2010

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Feb 3, 2010

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Feb 19, 2010

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Mar 5, 2010

Hi - I am new to Linux and Ubuntu so I have no idea how to fix or problem solve unfortunately I installed Ubuntu 9.10 from scratch recently on this laptop and all was good. I connected to my WIFI network no problem. It's WPA PSK encrypted, DHCP enabled. I just set it up in Network Manager and it was all fine. Then after a few days I installed a printer and some packages and updates via synaptics. The network connection started dropping after 20 mins or so. Only a reboot would restore it - auto connects at first, runs fine till it drops then never will reconnect. I posted on here, someone gave me some lines to put in a config file. I tried that. I didn't seem to help much, problem remained. Yesterday I checked for updates and there were a whole bunch so I just installed them all. Now I cannot connect at all. I have deleted and recreated the connection in Network Manager but it doesn't help. It tries to establish a connection but never achieves it. I am connecting to the internet now on the same laptop booted into Windows, so all the hardware is fine.

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Ubuntu Networking :: Loss Of Wireless Connection?

Mar 11, 2010

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1. Will updates always undo my wireless? Are there certain updates I should avoid if I want the wireless to stay up and running? (I just assumed the thing to do is just get the updates -- though I am guilty of having no idea what they were about.)

2. Did the updates cause one of my instrucitons to no longer work, or need to be modified?

They were as follows:

sudo apt-get install build-essential
cd ~/Desktop
sudo tar -xvzf rtl8192se_linux_2.6.0100.1012.2009_64bit.tar.gz
That 'sudo tar -xvzf...' operation is the one that stops me. Is there something to change in that line? It goes on:
cd rtl8192se_linux_2.6.0100.1012.2009_64bit

[Code]...

this worked the first time I tried it. I posted this earlier under 'hardware', and do not know how to get that post off, so I typed it here once I realized.

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Ubuntu Networking :: Wireless - Connection Get Off Line

Mar 27, 2010

I have a very strange wireless problem, i have ubuntu 9.10 installed on a dual boot with a belkin pci wireless card, i have used ndiswrapper to install the windows driver, plenty of wireless connections come up, i find my own and try to connect, it asks for the password (i have double checked and this is correct), and then goes to connect, now heres the weird bit, the connection light comes up on the card as though its on the network then after about 1 minute the light goes out and ubuntu tells me it is now off line.

[Code].....

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