Ubuntu Networking :: Wireless Dropped Every 3-4 Minutes

Jul 11, 2010

I've been using my current laptop since Ubuntu Edgy Eft and, since then, I never had any problem with wireless ( Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection (rev 02) ) Since I upgraded to Lucid, my connection is dropped approximately every 3-4 minutes for 10s. Network-manager doesn't show anything but it is well visible with the netspeed applet that shows a warning sign "No connection" instead of the speed.This is very annoying and frustrating. I recall having seen the same issue in an blog article where the author was talking about his upgrade to lucid. It was just one line and I didn't care a lot at the time and cannot find the article back.

Is there anyone having heard about a possible issue ? (I've upgraded from Karmic when Lucid was still in Beta, so it might be the cause).

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Ubuntu Networking :: Wireless Keeps Getting Dropped

Oct 1, 2010

My wireless connection keeps getting dropped very frequently. I am on a Dell XPS m1530 and I will just be on the interent and it just disconnects from wireless and I have to connect back. It is super annoying. I am on the latest version of ubuntu.

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Ubuntu Networking :: Wireless N Dropped Connections

Jul 4, 2011

I'm working right now with ubuntu 11.04 on my asus ul30vt-x1, my wireless n network is working on a linksys e3000 router, my issue is basically with long file transfers. When the issue started i was reaching speeds of 100 Mbps through my wireless network even when I'm connected at 150 Mbps. However when at this speed, I don't know why, the connection is dropped after some minutes or even seconds. I made some testing on windows, I'm reaching 70 Mbps there and no problem at all with dropping the connection.

So my conclusion is that for some reason the linux driver, in my case, is not able to handle such speed of 100 Mbps. I know that a wireless network will have a throughput of aprox 60% the wireless speed. Right now im trying to apply traffic shapping to my transfers so i can get 70 to 80 Mbps, its being working so far.

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Networking :: Wireless Is Flakey -- Dropped Connections, Poor Speed?

Jun 15, 2010

My wireless is flakey -- dropped connections, poor speed, etc. As diagnosis, I loaded the 'wavemon' utility so that I might watch the radio and signal and noise.Things will be good, then fall off, then get better, then go away entirely. Repeat continuously and randomly. For these experiments, my laptops -- more than one -- are on a table.The table is roughly 15-20 ft laterally from the access point. The access point is also 8 ft above the floor vs. 3 ft table height.(grin) While the signal "wobbles" everything else is mechanically stable and otherwise not moving.

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Ubuntu Networking :: Wireless Disconnecting Every Few Minutes?

Jan 16, 2010

I have a Toshiba Satellite M55-S325 (as it came from the factory, no mods), a Linksys WRT54G router, and Ubuntu 9.10/Karmic with all updates. I've had issues since I upgraded from 9.04/Jaunty to 9.10/Karmic. It did work for awhile (I think a few days), but then it suddenly just couldn't find our wireless network. I reformatted (with 9.10) thinking it had just been a bad install - now I can connect to our network, but it throws me off every two minutes. My roommate (Dell laptop, Vista) has no problems with the internet, and I've visited a friend (in another state) and used her wireless internet without issues (though I couldn't tell you which router they were using). I've gone into our router's settings (with both my laptop and my roommate's) to reset the router or change the security settings, but with no real progress.

Here is my ifconfig results:

Code:
eth0 Link encap:Ethernet HWaddr 00:0f:b0:87:b3:80
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

[Code].....

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Ubuntu Networking :: Wireless Connects After 5-10 Minutes?

Feb 1, 2011

My wireless connection always worked. When I log in, I already have internet access.I went on holiday and connected to several other networks.Now the laptop will not connect anymore. Sometimes after 5-10 minutes.When I forse to connect ("Connect to hidden wireless network), the laptop connects after several seconds. But not automatically.My wireless modem uses WPA2, MAC filtering and has a hidden access point.I use Ubuntu 10.4 on a HP Probook laptop. In "Network connections", under "Wireless", the "Connect Automaticly" and "Available to all users" are selected. When connected, the signal strenght is very good.

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Ubuntu Networking :: Lose Wireless Connection After 10 Minutes?

Dec 5, 2010

I have a Acer Aspire 7535-5020 laptop with a Atheros AR5B91 wireless adapter & lose my connection after about 10 minutes.The only way to reconnect is by rebooting.I read in another thread that installing the linux-backports-modules-karmic would solve the problem.However when I try to install it I get the message, Error Dependency is notsatisfiable:Linux-backports-Modules-2.6.31-22 generic.

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Ubuntu Networking :: Wireless Connection Drops Out After 15 Minutes?

Jun 13, 2011

Having struggled to get the wireless connection at least working I find it drops out after 15 minutes or so. When I check for wireless connections I can see none at all and the "Disable/Enable wireless conncection" has disappeared, the Network one is still there. I get an auto reconnection if I reboot and all is well for another 15 minutes. Is there any way i can recover the situation without a reboot? I am trying to install the hplip-3.11.5 driver for my new wireless printer,the program take a while to install and by the time it has started looking for the printer the connection has dropped out. I can't be sure but I don't think it was dropping out before I connected the printer using my wired pc. All good fun but I'd like to get it sorted so I can get the engine back in my motorbike, the sort of technology I prefer!

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Fedora Networking :: Wireless Access - Connection Lost Within 3 Minutes

Apr 5, 2009

I have fedora 10 and am having problems with the wireless access. My computer uses the Realtek Semiconductor Corp. RTL8187B Wireless Adapter. It connects to the network, it gets an ip address and a broadcast address, but it loses connection within 3 min. I'm also new dealing with linux and fedora.

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Ubuntu Networking :: Dell 1545 - Wireless Connection Drops After A Couple Of Minutes?

Apr 10, 2010

I have a Dell 1545 laptop with ubuntu 9.1 32-bit installed (the 64-bit had a bug with the wireless drivers which is why I have not used it). Initially, the laptop worked well with the wireless (a sky router with WPA security) but now, the wireless signal drops after a couple of minutes of usage. I have to reboot the laptop or sometimes reboot the router as well to regain the wireless signal. I am using the Broadcom STA proprietary wireless driver.

I have an older dell inspiron 6400 as well with the same OS and driver and it works perfectly without any problems for hours / days.

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Ubuntu Networking :: Connection Stop Working With RTL8187 Wireless Adapter After Few Minutes

Feb 4, 2011

I buy a new usb network adapter (Through DX), when I try to use it in ubuntu or BackTrack4 Final it is working, and connecting networks even with WPA encryption. But after few minuts it stops working totally. It is showing that I'm connected to the AP but web sites do not respond.

Notes:
- I have another PCI Wireless adapter which works fine.

- The problematic adapter works great on windows.

- A driver CD came with it, including a linux driver which I wasn't succesfully installed.

- A BackTrack3 Disc came with it, claming by the instructions that the adapter will work with it. I didn't try it because i have backtrack 4 final.

It took me dozens of surfing the web hours, and too many restarts,

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Ubuntu Networking :: Wireless Connection - Takes Upward Of 10 Minutes And Over 20 Times Of Me Clicking 'Connect'

Jun 20, 2011

I have been having trouble with Ubuntu 11.04 when connecting to the Internet via Wireless Networking. It will connect, and has good speed once it connects, however it takes upward of 10 minutes and over 20 times of me clicking 'Connect'.

Is there a way to connect to a wireless network quicker? My network is unsecured and without a keyring. It is not only slow connecting to my network, but the network of other's.

lspci information:

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Fedora Networking :: Worthless Wireless Connection \ Works Well For A Few Minutes Then Has A Period Of Inactivity - Then Slow?

Nov 24, 2009

I'm running Fedora 12 on an Acer Aspire One with KDE. The built-in wireless works without a problem EVERYWHERE except at work. It's a shared wireless connection using WPA/WPA2 security.I can connect but it's "hit-and-miss" if I can do anything with it. Somedays it works well for a few minutes then has a period of inactivity - then slow - randomly receives...It worked flawlessly when the computer was running Windows7 no one else has connectivity issues but I'm the only one using Linux.

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SUSE / Novell :: Wireless Signal Being Dropped And/or Not Being Picked Up?

Jul 26, 2010

I recently switched to openSUSE 11.2 and updated to 11.3 almost immediately. Everything appears to be working well, with the minor exception of my wireless.I go to connect and one of two things will happen. Either it will hang in a constant loop of preparing to connect and then asking for the security key and then back to connecting. That or it will just not connect period.I'm using a dell wireless 1397 mini-card.

lspci gave me:
00:00.0 Host bridge: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub (rev 07)

[code]...

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Ubuntu Networking :: Keep Getting Dropped From Network

Oct 11, 2010

my laptop running 10.10 and a dell. the college is witch i attend's unsecured wireless network keep disconnecting me from every on average 45 minutes to an hour ands will not re connect for about 10-15 minutes. it works fine anywhere else i go but here i get dropped.

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Ubuntu Networking :: Packets DROPPED By Firewall?

Mar 13, 2010

I am using ubuntu 9.10. Configuring my firewall using guarddog. I have setup a rule to allow traffic OUT on port 7078 UDP, and just because i'm having problems i added an IN rule.

# Create the filter chains
# Create chain to filter traffic going from 'Internet' to 'Local'
ipchains -N f0to1

[code]....

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Networking :: Dropped Packets But Only For TCP Connections?

Oct 1, 2010

One of our RHEL 5.3 servers has trouble about 30% of the time with TCP-based communications, but it does not seem to be firewall issues. From another computer on the same switch, you can SSH to the server sometimes and other times the SSH command will just hang. When it hangs, you can often just Ctrl+C and try it again and it works. Same with HTTP connections. You'll get part of a web page and then FireFox will just hang waiting for the rest and eventually time out. Same goes for communication initiated FROM the server. SSH'ing from the server to any outside server or connecting to any web site works sometimes, but most times not. iptables if off. No other firewalls are running. Tcpdump shows communication gets so far and then stops. It does not matter whether tou run tcpdump on that server or the client connecting to it. Either way you see the connection stops working. MEANWHILE, pinging with small or large packets works flawlessly. 10,000 packets, zero drops.

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Networking :: Dropped Packets On Firewall

Jan 11, 2010

I've recently installed Ubunter 9.10 Server Edition to use as a NAT firewall for the lab I run. I'm using iptables to do NAT forwarding and everything works great except that, occasionally, connections seem to break. Ssh connections close with "Connection reset by peer" and HTTP connections just stall out.I believe this has to do with the firewall's internal network interface occasionally dropping packets.

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Networking :: Netstat - Dropped Packets Under IP

Feb 13, 2009

I have question regarding netstat? When performing a "netstat -s" I receive the following information regarding dropped packets under IP:

IP:
93978695 total packets received
0 forwarded
0 incoming packets discarded
79472157 incoming packets delivered
65235033 requests sent out
29527 outgoing packets dropped

However if I run a "netstat -i" I have no dropped packets whatsoever: (apologies for the table format):
Kernel Interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
bond0 1500 0 34326528 0 0 0 72755307 0 0 0 BMmRU
bond0:1 1500 0 - no statistics available - BMmRU
bond1 1500 0 28605491 0 0 0 20948952 0 0 0 BMmRU
eth0 1500 0 34199550 0 0 0 72755278 0 0 0 BMsRU
eth1 1500 0 126978 0 0 0 29 0 0 0 BMsRU
eth2 1500 0 97911 0 0 0 1 0 0 0 BMsRU
eth3 1500 0 28507580 0 0 0 20948951 0 0 0 BMsRU
lo 16436 0 34094225 0 0 0 34094225 0 0 0 LRU

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Ubuntu Networking :: Ifconfig Showing Millions Of Dropped Packets?

Feb 28, 2010

with my other ethernet card problem solved, I suddenly run into this:

Code:
eth1
Link encap:Ethernet HWaddr 00:02:e3:16:37:4c
inet addr:10.0.2.1 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::202:e3ff:fe16:374c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

[Code]...

This card was working perfectly fine up until....an hour ago and it started doing this. My iptables isn't blocking it somehow, because I didn't change anything. I tried reverting to an older kernel and that didn't help. It's not the network cable, it works fine in any other card. Also, the dropped packets seem to count down? It seems to go down by exactly one every time I run ifconfig, no matter the length of time in between running it.

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Ubuntu Networking :: DHCP Clients Table In Router Is Dropped

May 23, 2011

when I change the hostname on my Ubuntu server, the DHCP clients table in my router is dropped.I'm running 32-bit Ubuntu Server 10.10. My router is a Linksys WRT54GL with firmware version 4.30.15. I'm changing the hostname by modifying /etc/hosts and /etc/hostname. I've also tried changing the hostname using the Linux hostname command in a terminal, but this does not seem to behave correctly according to the manpages (it does not actually change the hostname, or update either of the aforementioned files).

I've also tried using a different router - a Linksys BEFSR41 - but the DHCP table is still dropped when I change the hostname on my server (although this router is not all that different from my other one).

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Networking :: Connections In Virtual Machine Getting Dropped?

Mar 17, 2011

I've forwarded incoming connections on port 25 to my virtual machine with the following commands:

sudo iptables -t nat -A PREROUTING -p tcp -i eth0 -d 10.1.1.3 --dport 25 -j DNAT --to 192.168.56.101:25

sudo iptables -A FORWARD -p tcp -i eth0 -d 192.168.56.101 --dport 25 -j ACCEPT

The strange thing is the connections coming through in the virtual machine seem to be getting dropped. A port scan from the internet says the port is closed, but it is not the case as I can see the connection coming through. As you've probably worked out, I am running a mail server. When I send myself test mail, the connections from the senders mail server also gets dropped.

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Networking :: Packets Go Out One Tunnel / Come Back Another / Then Are Dropped

Dec 5, 2010

I've run into a of a routing issue pertaining to packets leaving a firewall, traversing and IPSec tunnel, hitting the target and then returning via a different tunnel, finally arriving back on the source firewall but on a different interface from where it started. Once the packet has returned to the firewall it is dropped I've been unable to discover the reason for the drop. Two sides to the system, Firewall A and Firewall B. Each firewall provides the default gateway to its respective side and offers a backup IPSec tunnel to the high capacity tunnel handled internally. The Layer 3 Switch uses OSPF and takes care of the bulk of the behind the scenes routing between the sides. In case of failure the Layer 3 switches direct traffic to use the Firewall tunnels to route traffic.

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Networking :: TCP Packets Seem To Be Dropped On Debian Squeeze W/NAT?

Apr 4, 2011

I'm running a Debian Squeeze 6.0.1a box that's connected to my ISP via an L2TP connection that's managed by OpenL2TPD. The box is configured to perform NAT from local clients (on eth0) to the internet (on ppp0).

However, I'm having an issue with TCP packets that are sent from the box itself to the internet (packets originally coming from the local clients get sent and received over the internet just fine)

I'm using this Python app to test this:

Code:
#!/usr/bin/env python
import socket, time
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 5003))
s.listen(1)
while 1:
conn, addr = s.accept()

[Code]...

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Ubuntu Networking :: Connecting To Router - Netgear DG834 - Connection Often Being Dropped

Jul 12, 2010

I have a Netgear DG834 ADSL router (v3) which I have used for a couple of years. Prior to that I had a v2 of the same router, but upgraded for the one that supports ADSL 2+ (here in the UK).

Recently I have been having problems with the connection often being dropped, and when I access 192.168.0.1 for the router admin page, when it is not working I get no IP address listed for that of the ISP's server, and sometimes as well the upstream and downstream speeds are listed as 0 kbps.

Usually this was resolved by rebooting the router.

However, for the last couple of days, when using Ubuntu 9.04, the page of the router at 192.168.0.1 will not load. I have tried numerous different browsers, and none of them will give the router admin page.

When I tried booting from a live CD of Fedora 13, the router admin page came up just fine, no problems (although still not getting a proper connection to the Internet).

I was going to try to use the older router I had, but so far, as I cannot access the router admin page in Ubuntu, I have not done so (not had the time, and now I am at work posting this).

So there must be a problem in Ubuntu that is preventing it showing the router's admin page. The Network connection details show that the router has given the PC an IP address of 192.168.0.6 and the DNS servers are listed, so I know that Ubuntu is talking to the router, but it is not allowing me to access its settings in any way.

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Ubuntu Networking :: Mobile Broadband Connects / But Won't Reconnect After Dropped Signal

Nov 8, 2010

I'm running a ZTE MF112 HSUPA USB stick (3 broadband dongle) for wireless broadband using network-manager.I can connect fine to mobile broadband, but every now and then, the signal drops and the connection is disconnected. When I try to reconnect it goes straight to network disconnected. It looks like it's not even trying to connect.Then when I right click on network manager, disable mobile broadband, then enable it again, works fine until the next disconnect.The point is, why do I have to keep disabling / enabling it? Pulling the dongle out works too. But there should be a workaround.

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Fedora Networking :: Ssh Session To A Particular Server Keeps Getting Randomly Dropped

Jan 23, 2010

When I am running linux on my laptop, my ssh session to a particular server keeps getting randomly dropped. What should I do to troubleshoot the problem?

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Networking :: Capture A Dropped Or Rejected Firewall Packet?

Jul 3, 2011

I'm running ubuntu 11.04, and using firestarter for my firewall. Logging events, all good, but I'd like to be able to (tcp)dump the packets being dropped/rejected. Wireshark is great after the event, but can I hook iptables and tcpdump together somehow so the system logs the entire packet rather than the summary when it says "no"? I've had a quick look/google, but can't find anything. I'm sure somebody must have wanted to do this before - any pointers people?

PS - will keep looking and post the answer if I find one....

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Fedora Networking :: Can Ping But Cannot Browse - Outgoing Packets Dropped

Oct 5, 2010

In my Fedora13 machine, while in mobile broadband, i can ping and skype outside, but cannot browse/yum etc. Few output that may be of relevence are here:

$ netstat -s
IP:
149468 total packets received
6 with invalid headers
16174 with invalid addresses
0 forwarded
0 incoming packets discarded
118821 incoming packets delivered
101331 requests sent out
124 outgoing packets dropped
866 dropped because of missing route .....

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Networking :: See The Number Of Packets Dropped By Kernel Due To Insufficient Queue Size?

Sep 15, 2010

As is known, there is a queue lies between the kernel subsystem and the network driver for incoming data. And if data come when this queue has no space for it, the data got dropped by kernel. Is there some way to see how many packets are dropped due to this buff penury? I tried netstat -s but could not find something useful. On the other hand, I found this 12176 packets collapsed in receive queue due to low socket buffer from netstat -s. I think this is something related to the per-socket buffer, but not the incoming queue between the network driver and kernel. Is this right?

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