Ubuntu Networking :: Squid Stops Working When Switching Connection Type?
Jul 13, 2011
I have squid and dansguardian installed on my laptop. What seems to be happening is when I go from home (ethernet) to school (wireless), or from school to home, squid stops working (sites don't load - at least some don't). My fix was to shutdown squid with
Code:
sudo squid -k shutdown
delete the cache folder and then recreate it with
Code:
sudo squid -z
The problem is that this keeps happening and it is becoming a hassle to have to go through the 1-2 minute process every time I change my connection. I had squid and dansguardian set up and working for about a month on this installation and since Christmas on my old installation. This problem has only started recently. Occasionally, I would have to restart my computer because of DNS issues but I did not have to do so every time I changed connections.
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Jul 24, 2010
I have an Intel PRO/Wireless 5100 AGN [Shiloh] on my HP Pavilion dv7 running a fully updated Lucid (10.04).I can connect to the wifi on my smartphone and I have no problems at all.However, after a recent update I found myself unable to use my home wifi connection.Once connected, I can usually transfer about 1 MB of data and then nothing else will go through.# uname -aLinux lappy 2.6.32-23-generic #37-Ubuntu SMP Fri Jun 11 08:03:28 UTC 2010 x86_64 GNU/LinuxSince the home wifi router, a Linksys Wireless-G SRX, is a bit more advanced than the wifi capabilities of the smartphone, I'm inclined to think there is some feature being used that is now broken in the iwlagn driver.I've tried to disable the "11n" support with this:
# modprobe -r iwlagn
# modprobe iwlagn 11n_disable=1
but the problem continues even after that ... is there something else I can try to disable?r some way of getting the details of these two connections to see exactly what the difference is?
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Sep 1, 2011
I have a problem with my wireless connection in ubuntu (natty with amd64bit) There seems to be intermittent disruption in my connection. Havent seen a pattern as yet, though it happens once a day. After that I cant get it to work at all and only restarting + reconnecting the USB device helps. Dont know what is going on.I have already read these pages : Commands and Wireless Troubleshooting.Here is my line of though1) Given that I am able to connect other devices to it while I am not able to connect through this desktop, I think the router is OK.2) I am able to work with it after restart + re-connection . And so the driver is OK and is loaded. The driver seems to be oK and loaded even while I am not able to connect.So why is this happening and how can I get this under control without having to reboot and re-connect the device everytime.Here are the output for the commands which will give you a more detailed idea of the process. Before reboot while I was not able to connect:
Code:
Script started on Tue 23 Aug 2011 01:40:08 PM CDT
raja@UshRaj: ~raja@UshRaj:~$ sudo nm-tool
[code]....
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Feb 5, 2011
I am currently dual booting between Linux Mint 10, and Windows Vista SP2. Wireless works fine in both these OSes, but when I quit Mint and load Windows, 70% of the time my wireless stops working.
ie, it does not detect any wireless networks nearby, althought there are tons of them.
Restarting the wireless device doesnt help, I have to restart my computer at least 4 times for wireless to start working again.
And as of now, my wireless in Linux Mint has stopped working.
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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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Nov 13, 2010
I'm running Ubuntu 10.10 Maverick Meerkat 64-bit on my desktop with a wired internet connection (with no firewall). For the past 2 days, I have observed that1. Firefox randomly throws up errors like "Problem loading page" whenever I click on a hyperlink. When I click on Reload, the page loads up just fine. This has been happening a lot recently..and I do not remember updating anything consciously. By the way, ipv6 is disabled in Firefox.2. The network stops working all of a sudden (usually indicated by the Firefox error). The Autho Eth0 indication is active, but I am unable to connect to any external machine.
3. Needless to say, this error is manifesting itself in apt-get as well. I get "something wicked happened" errors all the time, and am unable to download or install anything.That this is not a problem with the ISP is obvious because I also have Windows (from which I'm typing this, ironically), which is able to access the internet.Is this a bug in Ubuntu 10.10?
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Mar 15, 2010
I am having a problem where when i connect to a wireless network at school the internet works for maybe about 30 seconds but then stops. It still says connected but i cant get to internet websites Running Ubuntu Karmic 9.10 Installed "inside" windows School has multiple routers is that a problem? all have same essid Can connect to wirelesss at home flawlessly.
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May 5, 2010
I just configured my (dataone) ADSL connection and now it stops intermittently. Can anyone tell me why this happens and what is the solution for this.
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Jun 30, 2010
Internet connection has been very unstable on my system latley. Think it was because of last update.
Basically for example i watch a video on ..... and it never fully loads. Even when i browse pages dont fully load and i must wait a few seconds before i press reload.
I am connected through cable. Network is working fine on other OS
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Apr 17, 2011
I have a problem with my wlan connection. it works for few seconds, then stops for few seconds and then starts again (without interaction from my side). I run Ubuntu 10.4 Lucid. The issue started few days ago. Using ethernet, there is no problem. The problem does not exist with other computers i have, there wifi and internet work continuously and flawless. I ping my wlan router. one sees that connection to the wlan router starts and stops every few seconds... (of course, internet connection then behaves analogous)
Quote:
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=1.30 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=1.21 ms
[code]....
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Feb 23, 2011
I have a Dell PowerEdge 2900 on which I just installed from scratch Debian Lenny 5.0.7 AMD 64bit. I am having issues where when I ifup a second nic card the server will maintain connectivity for a period then all connectivity is lost and I have to ifdown all eth interfaces and bring them back up to regain connectivity. Here's how the server is laid out: I have 12gb or ram with 2 Xeon 5450s in the server, as I mentioned it's a Dell Poweredge 2900. It has a build in Perc6i raid controller with 2 drives in Raid 1 for the OS and 4 drives in Raid 5 for storage. It also has a Perc 5e card in it connected to 3x6TB raid arrays. I mention this because they are all sharing the PCI bus if that matters.
The nic cards I started with were the two builtin Broadcoms and lspci reports them both as:
Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet (rev 12)
After I started experiencing the problem I added an inexpensive Trendnet based off the Realtek RTL-8169 chip rev(10). Debian sees this card without any need for additional drivers. The Broadcoms required the non-free network drivers provided by and built against the Debian kernel (no custom drivers). One nic card is configured with a public IP address and I use IP tables to reign in the traffic to http and https only. There is also an outbound openvpn tunnel from this machine back to our offices through this interface. The second nic card is hard wired to a mac mini directly and is assigned an 10.x.x.x address. I am able to see the mac mini from it.
The amount of time the network connection stays up doesn't seem to follow any set pattern. I have flood pinged the 10.x.x.x while running apt-get and one time it fails, the next time it doesn't. Sometimes the network connection degrades and I can do an nslookup one second and get nothing and the next I get a response. Finally though it fails and it requires me to ifdown the eth connections and ifup them to get them going again. I don't really see anything in the logs. I've looked in kern.log, messages, syslog and pretty much came up empty, but not 100% certain I'm looking for anything more subtle than obvious errors. The routes all look good too.
Naturally, as Murphy's Law would have it, this is a remote server at a colo so that doesn't make troubleshooting any easier. What I have done to temporarily prevent me from losing complete access to the server is setup a cron script that runs once a minute and pings something. If there is 100% packet loss, it restarts the nics and I'm going again for another arbitrary period of time. Lastly, this has no effect on the OS running. I don't have a hung system when this happens just a trashed network connection.
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Dec 17, 2009
We have two offices suppose A and B. At office A, we use centos 5.3 computer as router and squid proxy server. At office B we use a cisco router to connect to Internet. Computers at office A that has direct access to Internet can access computers behind cisco router at office B using vnc viewer. But computers at office A that can use internet only through squid proxy can't access computers behind cisco router at office B. Is there any way so that I could allow squid clients to access computer behind cisco router at office B using vnc viewer.
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Jun 16, 2011
I use ssh to port forward my browser(firefox) using SOCKS to a "server"(ubuntu desktop with ssh ) I have in the UK, to watch iplayer etc wen traveling... I forward port 1024 (default port for SOCKS? **mite b untrue..). the "server" is running ubuntu 11.04.
could i set up a transparent proxy(squid) on the "server" in the hope tht it speeds up the connection etc... my thot was get squid to listen on port 1024, or set up the ssh port forwarding to the squid port... would tht work? is the a better/different way to do it? the issue is tht sometimes the ssh connection can b slow at times
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Jun 16, 2010
I'm having some problems with wireless, it works fine on boot but after a while pretty much randomly, it can be a few days or it can be a few hours, it stops working. I'm not sure which command would tell you what and it would take a little while to debug it because like I said it's random, but if anyone knows what to do please tell me! I'm on Lucid Lynx 10.04.Another something that's really bothering me (But not related to wireless) is that for some reason when I restart my computer, the top panel keeps changing the applets locations.
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Oct 22, 2010
I have created a Samba share, using the fantastic Webmin tool. I have a network media player which can connect to my router, and then access windows (samba) shares. Most of the time, it works fine - it's able to stream HDTV wirelessly across the network. However, every so often, it just stops working ... the media player sees :
Network, then
WORKGROUP, then
FILESERVER-1 (machine name), then
Media (share name), then
Video (subdir, then
TV_Shows (subdir), then
MyShow.AVI ... just hangs
if I use the Webmin tool, I see multiple samba connections all from the media player. Restarting samba seems to have no effect. The only way to fix it, is to reboot.
logfile I can check, or a setting I can tweak to fix this issue ?
When it get like this, trying to access the share from a windows machine, just gives me an error saying it can't find the machine. But when it's rebooted, it works fine.
I have mapped the "nobody" linux user to "guest" which is what the media player is defaulted to login with (it's primarily sold as a "Windows" media player), and using Webmin I have assigned the "nobody" user read-only rights to the samba share. It worked fine for 6 months, until I added this new drive.
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Aug 31, 2011
My Audio stops playing when switching to console from Xorg. When I switch back it continues playing. Is it supposed to be like this? Any way I can make it play continuously? I've already checked the Howtos and this forum for this problem but havent found anything similar.
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Feb 10, 2010
This should be easy for the Ubuntu Gods to sort out:
I have a Sabrent USB 802.11N adapter. (I am using 64-bit Ubuntu in all below)
I plug it into a 9.04 box and it works fine. Plug it into a 9.10 box. Network manager sees it and can attach to the network, but has 0% signal strength, no internet.
Rebuild the 9.04 box with a fresh install to 9.10. 0% signal, no internet. Try 10.04 Alpha 2, 0% signal strength, no internet.
Rebuild same box down to 9.04. Works perfectly. 100% signal strength. I do all updates and then the upgrade to 9.10 using the USB. Everything works fine until the reboot. Then, USB connects, but 0% signal strength, no internet. Oh! ifconfig says the wlan0 interface is up, but it has a random ip address.
I don't mind using 9.04 because for the forseeable future, the box is just going to count aliens for Seti, but my wife wants it off the counter and I would like to upgrade someday.
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Aug 13, 2010
I upgraded to the newest version of Ubuntu a few months ago, and ever since then, the ethernet connection to my router stops working when I restart the machine. It eventually comes back, but after varying amounts of time. Sometimes 20 minutes, sometimes 2 days.
Restarting the computer and cycled reboots of the router don't seem to have any beneficial effect, at least that I can detect.
The light for the slot on the router does not light up like it normally would, so it's almost like the OS doesn't even recognize the network card.
Ubuntu 10.4,64-bit. Dell XPS 410.
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Oct 15, 2010
New Toshiba laptop dual booting with Windows 7. I really like MM 10.10 and most things are working great! Periodically I will be web browsing and I lose connection. At first I thought it was Firefox but if I try to disconnect wireless and reconnect it will no longer connect unless I reboot. My network is hidden but Ubuntu finds it no problem on a fresh boot and connects per my settings and it is not a network problem since I can connect to Windows all day long and the rest of the family never has problems.
My wirless device is: Realtek Semiconductor Co., Ltd. RTL8191SEvB Wireless LAN Controller (rev 10)n and all OS updates are applied that I can find. I am thinking about un-hidding my network since years ago that used to be a problem with Redhat and even early Ubuntu but beyond that I cannot think of what else to try.
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Oct 22, 2010
networking stops working after suspend/hibernate on Ubuntu 10.10 and it used to happen on 10.04 though i did not bother to resolve the issue then
output of sudo lshw -C network
*-network DISABLED
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:08:00.0
code....
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Mar 22, 2011
I'm currently working with Ubuntu 10.10.I wanted to add a default route to a gateway named ppp0.I did it with the command> route add default ppp0It works ok. But then from time to time it suddenly stops and I have to go back again to the server and retype the command. I'm clueless as to why is it happening. I can assure no one is working at the server or doing anything over there.Does anyone know causes that might be triggering route default to stop working?Btw where is the best place to add this command so it will be executed automatically on start-up and without needing to login to the server?
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Apr 15, 2011
i am getting some troubles with WiFi. I got a Lenovo G550 with a BCM4312, at first i found some troubles making it work but i managed to find a proper driver and it is working "fine" Every 5 minutes or so my WiFi freezes and internet stops working. I don't get disconnected from the network, but until i don't reconnect to it, internet will not work.
Rare thing is, i realised that this happens ONLY when my notebook is plugged in. When it's working on battery, this does not happen. If i use it on battery it works for 30-40 mins (or more) and 3 minutes after i plug it in, it just stops working. I'm using Ubuntu 10.10, if there is any information i could give, just tell me. I also have a Windows partition and this does not happen there, either plugged in or on battery.
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May 25, 2011
I have a Trendnet TEW-649UB Wifi N dongle, and I'm using the latest Realtek firmware downloaded from their website. It works ok, but everytime, after an hour or two, the blue light turns off and the dongle stops working. I have to unplug it and plug it back to bet my network back up.
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May 26, 2011
My Ubuntu when i start it up, go to the wireless networks , try to connect to my network it trys to connect stops than says disconnected. My internet card is a Cisco Aironet wireless (idk the model number)
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Sep 1, 2011
I have a wireless network using this driver:
Bus 001 Device 002: ID 0bda:8187 Realtek Semiconductor Corp. RTL8187 Wireless Adapter
and everything works fine for some time. After a few hours or maybe less (if I push bandwidth to the limit) the Internet freezes. I can't even ping my router. If I disconnect and reconnect either the device or the connection via network manager , it does work for a minute only and then freezes again. If I restart Ubuntu entirely, it works again. But for a while...
It works 100% in Win7 and I have no problem at all there. But I am very annoyed that I cant have reliability in Ubuntu. I want Ubuntu as default.
It has something to do with drivers or an inner variable or buffer or something.
At least, is there any way to reset my network connection without rebooting the OS?
I tried sudo /etc/init.d/networking restart but it gives me: Ignoring unknown interface wlan0=wlan0.
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Jun 27, 2011
I have just installed Fedora 15 xfce on my desktop. When I 1st start my computer my RaLink RT2870 works but after a while it disconnects and won't start again till I restart.
I can't see any pattern I am doing to make it stop. I been doing various tasks when it stopped working. I don't what command prompt or configuration file to look for or what to configure in the file.
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Apr 18, 2010
This holds true in Transmission and NOT in Vuze. UPnP is enabled, ports are randomized and open each time. Pings to outside still work fine, but I cannot browse to websites (404 errors) when the app is running. I'm stumped, is Transmission locking all other in bound traffic/ports except the one it wants to use?
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Jul 28, 2010
Previously my wifi has worked just fine in 10.04, but as of recently I keep losing my connection after leaving my laptop on for a while (and this happens sooner and sooner each time, used to be daily, now it's every few hours), I can no longer see any networks at all, and I have to reboot to get it working again. I haven't even installed or removed any packages lately, so I'm not such what might've caused this to break all of a sudden.
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Oct 13, 2010
I am trying to get a network bridge configured but every time I make the changes and restart networking (or reboot) eth0 appears to come up OK but I can no longer talk to the outside world via it. With no bridge defined, I can talk to the web using either wireless or wired; wicd is configured to switch to a wired connection when available (got rid of Network Manager. It didn't recognise eth0(!)).
I want to use the bridge so virtual machines (LXC containers) can talk to the web when the machine is wired to the wireless router. Eth0 gets its IP address (192.168.1.4) via DHCP from the router and I want to bridge to another subnet, 192.168.154.n say, and the containers will have fixed IP addresses 192.168.154.101, 102, 103 etc.
[Code]...
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Oct 23, 2010
I'm trying to get internet set up on my grandad's laptop (sony pcg-f590), which has a fairly old pcmcia belkin 54g wireless card. I've installed the relevant bcmwl5a.inf driver through ndiswrapper, and for a time wireless worked so I installed updates through update manager. however after restarting the network manager menu comes up with "wireless networks disconnected" and no list of networks (I know there are because my laptop works and his is sitting next to the router!). The light is on on the network card so I know the laptop is talking to it. Unplugging and replugging the card does nothing, and neither does restarting again.
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