Computer Causing Internet To Be Slow On Entire Network
May 4, 2012
I have 2 computers on a network, and 3 devices that use wifi on the same network. Basically when ever computer A is connected, every single computer or device on the network runs extremely slow, if at all. I get anywhere between 1200-2000 ping on pingtest with 2-60% packet loss. Even the speed on the "infected" computer A downloads extremely slow. I'm at a loss for this problem, everything runs slow and its because of the one computer connected to it. I have virus software on this computer, but its not the best so i'm not ruling out malware or viruses right off the bat.
Devices: Blackberry, Iphone, macbook (all wifi)
Computer A
Runs windows xp 32 bit,
amd processor
onboard video
[code].....
The internet modem runs to a router (Dlink dir615) then to a switch (or hub, if you will) and then to the 2 computers. The entire problem is solved by unplugging computer A from the system. But other than that I have no alternative.
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Aug 6, 2011
After recently setting up a new computer, my entire network seems to randomly loose internet connection. The interval between connection losses is as short as half an hour but it sometimes goes several hours without dying; the connections is lost for anywhere between 30 seconds and 20 minutes each time it dies.The new computer is running Windows 7 and is using a Roeswill USB wireless adapter, but I have tired it with a wire and the connection still dies. I am disinclined to believe that this is caused by a virus simply because this is a brand new computer that has had only minimal use; to be on the safe side, though, I did do virus scans with multiple programs, however, I did not find anything.When the connection is lost, a yellow exclamation appears on the task bar's internet access icon. If I check my available networks, my network still shows full strength. I have tried disconnecting and reconnecting but nothing happens; I don't get any "failure to connect" type errors nor do I get connection back. I have also tried physically removing the adapter/wire and plugging it back in, but that doesn't do anything either.
I am under the impression that the new Windows 7 computer is doing something to temporarily kill the entire network, but I don't know what.For the record, my modem is an old Motorola and my router is an old Netgear. Both are quite a few years old, but I don't think they are the problem as my internet was fine before I added the new Windows 7 computer. There are wired computers and wireless computers running XP, Vista, and 7 also on the network.
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Jan 3, 2013
decided first of all to connect an old router to the master (but not test) socket together with different cabling & splitter/microfilter - everything starting working almost perfectly (apart from downstream data rate was considerably lower than expected each time I connected - between about 1400 & 1600 Kbps - I have max. 8 Mbps).when I connected back my current router everything continued to be OK (apart from low downstream data rate) - until I would restart the current router and everything went back to very very slow.
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Jun 10, 2011
I have been using my DIR-655 for about 2 weeks now with Road Runner wideband services. Starting yesterday my internet became very slow and I discovered the cause was the router. I tried resetting it to factory settings and things will be fine and run smoothly for about 5-15 minutes but after that it goes back to being extremely slow. My speed tests would go from 10ms (normal) to 250-450ms. Before this issue occurred the Dlink was perfect, had full speeds. I am running a wire Ethernet connection.
I am currently using revB and tried upgrading firmware to 2.01NA which had no effect, but make my internet seemingly go back to normal for the first few minutes then nosedive again.I have also changed my speed/duplex settings in Network Config to 1gbs Full Duplex. I've also disabled QoS, and still no change. Not sure what else to do.
When directly connected to the modem everything seems fine. The modem is also the provided Motorola SBG6580 which I have called Time Warner to set the modem into bridge mode and have the DIR-655 connected to it.
With DIR-655 connected to PC
With Modem connected to PC
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May 11, 2011
This only started about a week ago and everything was working fine before then. My router is causing my internet to be slow (I know this because it goes at normal speed when I am connected directly to my modem)
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Dec 9, 2012
I have 2 laptops and 1 desktop all connected to the same router, the 2 laptops are connected via wifi and the desktop PC is currently connected via an Ethernet cable, both laptops run windows 7 while the desktop runs windows XP and more or less every time the desktop is booted after a few minutes of normality connection to the internet is lost and the yellow triangle on windows 7 appears so to fix this I have to go into my routers settings via 192.168.1.1 and reboot which then solves the problem and all machines function as they should including the desktop.
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Jan 26, 2013
Recently me and my girlfriend have been having issues with in game latency, receiving pings close to jittering to well over 300 where they were formerly in the 30-40s to identical servers. We live with a Chinese housemate who is extremely conscious of her privacy/personal space, we noticed a dirge of active ports on the router (both TCP and UDP) which seemed to have no association with any major application and assumed it was the old P2P boogie-monster. She is the only one who uses Wifi, an upon briefly deactivating the Wifi, all ping issues were instantly resolved. The bizarre thing is we still have plently of up/download bandwidth, I mean we're not swimming in a fibre optic connection but still a relatively healthy 1MB dl/70KB/s ul, more than enough for gaming.Deciding we needed a better idea of what was going on in the network, we downloaded Wireshark. We discovered a couple of things that might mean something, they might mean nothing at all:Firstly there was a deluge of random ARP requests coming from the suspect IP, something along the lines of:"who has 192.168.0.(random number) Tell (suspect computer's IP)"repeated over and over in bursts. A little googling found us this: Has Your Network been Now given that she is Chinese and is probably exposed to a lot of Chinese websites, is there any chance that this could be the root cause - could it drown the network to the extent that it produces terrible pings?Secondly there have been an inordinate amount of name queries coming from her IP to 192.168.0.255 (broadcast channel), they generally take the form of:
NBNS92Name query NB WPAD<00>
or
NBNS92Name query NB ISATAP<00>
and occasionally, it will name query my network id, leading to: (her ip being 192.168.0.3)
2144211275.734470000192.168.0.3 192.168.0.255NBNS92Name query NB (my id)<20>
2144231275.739314000192.168.0.3 (my id)TCP6658451 > netbios-ssn [SYN] Seq=0 Win=8192 Len=0 MSS=1460 WS=4 SACK_PERM=1
2144251275.741325000192.168.0.3 (my id)NBSS126Session request, to (my network id)<20> from (her network id)<00>
2144271275.744124000192.168.0.3 (my id)SMB213Negotiate Protocol Request
[code]....
Now combine this with the sometimes 9-10 active ports our router assigns to her IP (which don't appear to relate to anything according to numerous port id sites), does this send out a red flag to any of you? I realize it would be so much easier if I could get access to her computer, but as I said, she is very private and timid and doesn't seem to like even having people in her room, let alone letting them use her computer.
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Mar 8, 2011
I have a Cisco 871w that has been a very great product for many years. I recently switched to Windows 7 x64 on my main machine and now i am having all sorts of issues with it.. I have done a bit of research and found that it appears that it might be the firewall on the SDM that is causing the slowness issues. what does happen is that downloads from known good sites will run really slow. If i hook up my Macbook Pro or my Windows XP laptop i have no issues at all. i have tried Disabling IPv6 as well as SMB2.0 and this has not resulted in a fix at this point.
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Jul 31, 2011
if its possible to set a maximum bandwidth for the entire wlan or for entire Vlan in the WLC 5508 ?
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Feb 15, 2012
I am using virginmedia superhub which is supposed to give me a max of 30mbps. I use it wireless but am often getting fluctuations in speed - sometimes 500kbps upto 20mbps, nothing consistently close over 20mbps or close to 30mbps. I have bought a powerline kit - "develo olan 200 AV Wireless N" which has improved the speed but I still get fluctuations.
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Jun 30, 2011
For some reason, I have been trying to use QOS for several network related jobs (VPN, streaming). It would seem that when QOS is enabled and the appropriate ports are set which a high priority, the speed of my connection drops to a crawl. When I disable QOS, I'm flying again. I have confirmed ports, and protocol types (TCP or UDP) and nothing seems to work.
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Aug 22, 2012
I am a new network admin at my company, and I am investigating a problem that is on a network designed by someone no longer here. So, I can't ask why things were set up the way they were. Anyway, here's the issue:
We have 50Mbps WAN connections between locations. The WAN devices are 3750s, but the port plugged into the providers network is a layer 3 port. Config is below for one of the ports: [code]
So, these are Gig ports, but our service provider limits to 50Mbps. When we do a data transfer, we can't exceed about 20Mbps total on the circuit. The data transfers at maximum 15-16Mbps.
I'm not familiar with QoS. I've tried to read more about SRR, but don't understand it well enough to know. Are the QoS settings creating this restriction? Our provider swears that the bandwidth is allocated and its not being choked on their end. I have not taken off the QoS config to test it that way because I'm not 100% sure if its needed and serving some purpose. I don't want to break something in order to fix this.
Is the QoS causing this? Do I need to put a bandwidth statement on the port? Should we be using routers and LLQ?
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Aug 31, 2011
If my computer has been sitting for a while without using the internet and i open my browser the dsl and internet lights on my router shut off for about 15 seconds and no one in my house has internet and then it turns back on. this ONLY happens when it has been sitting for a while with the browser closed and my computer is the only one that makes it do it. also i don't have my computer set to sleep after a certain time, my monitor turns off after 5 minutes and that's it. i have a siemens gigaset se567 and my isp is telus.
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Mar 26, 2012
computer keeps restarting whenever i connect my network cable.
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Mar 7, 2013
I just installed a wifi card in the back of my computer. it only seems to recognize about half of the networks that my laptop recognizes (sometimes it doesn't seem to find my own wifi for a while), but shows everything with full green bars. connecting is difficult but can be done. it shows that my connection is healthy, but the internet is very very slow, it takes about a minute to load google. i am comparing the connection on my machine to the one on my laptop, and they seem pretty much identical (this is info i've gathered through ipconfig /all and also network connection details in windows 7). the only different information is that the IPv4 addresses are slightly different for each machine (which i think is correct). when i diagnose the connection it says that ''the device or resource (DNS server) is not responding"
i've tried flushing and renewing and releasing my IP in command, i've rebooted and reset the router about a billion times to no avail, i've got the latest drivers for the wifi card ('sabrent wireless-g 802.11g pci adapter / ralink turbo wireless lan card).. i tried changing my preferred/alternate DNS entries to google and the other one everyone recommends.. nothing is working. the internet is still exceptionally slow and the connection occasionally drops for a second or two.
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Dec 1, 2012
My friend recently got a new computer and he is getting 1 Mbps internet speeds on it. Its wireless. On his ps3 he gets around 10 Mbps. I am trying to solve the problem for him but its not working out.
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Aug 19, 2012
the internet today became insanely slow (I have wireless fyi) , something like 100 kb/s which used to be 2.0 mb/s. I can't even load a YouTube video at 360p. A few things have happened recently which may be the cause. First, I left my computer on all night, but since it has been off, so I don't think thats it. My mom recently turned off my computer by holding down the power button. I have searched my computer for viruses with 4 different programs and nothing has come up. I have also restarted my router and modem multiple times and nothing has happened. AND, I did a 3 hour long fragmentation of my hard drive/ cleaning of the computer.
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Jan 15, 2012
I bought a sony vaio I3 2.1 ghz 4mb ram laptop yesterday, and it has a very unstable wireless internet connection. The internet might be super slow at first, then drop entirely to where it says "you are not connected to the internet," then after not changing anything it will have a normal connection speed for a few minutes before repeating this cycle again. I have a macbook pro that I've had for two years connected to my wireless internet, and it has never had a problem. Even now it runs as usual on the wireless internet. I also have two ps3s that are working fine on the wireless, so I know it's not the router or signal.
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Sep 1, 2012
When connected to my router on my main desktop, I get download speeds of about .3-.85 mbps, I have comcast and a linksys N router, as well as a N wireless adapter in my desktop. If I use my laptop, I get around 10 mbps download speed, (Speeds are as of [URL]) but they still remain at .3 mbps on my desktop. I have tried two different wireless adapters in my computer. One is the Linksys AE2500 Dual Band N adapter, and the other is an ASUS N13 N Adapter. I have gotten the latest drivers of both adapters, but speeds stayed very low. When I connected the computer via ethernet cable, it ran at 16mbps. So I think that something must be wrong with some wireless settings, since I've tried 2 different adapters and was getting the same result, unless both were faulty I suppose. I also don't think it's my router's issue, because the wireless is working great on other wireless devices. I am using windows 7 on the desktop.
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Aug 21, 2012
Internet VERY choppy on one computer, has happened on more than one network, both wireless and wired. I've even reinstalled Windows 7 on the machine from scratch the problem is still there.The internet goes VERY slow like 10 minutes a page sort of slow. Almost feels like its being choked but from what i can see theres no programs taking bandwidth etc.I've searched all over the net and can't find anything. I can give any information needed.The machine is currently on wireless but the wireless signal is great as i use other device on it in the same area and there perfect.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:Windowssystem32>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Maru-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
[code]....
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Apr 5, 2013
I've got a 200mbps down/100mbps up fiber connection at home. When I do a speedtest I get around 192mbps down which is more then enough. However my problem lies around my upload speed, but only on ONE computer.
[code]...
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May 22, 2012
i bought a new computer....just for gaming....bout a 1500 big ones...and its internet speed is terrible...its the computer..on internet browsers (firefox, Internet explorer, Chrome) i get like 10-20 Kilos a second...but once im in game....the internet works perfect battlefield....FLAWLESS ping....like 32..
[code]...
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Jun 28, 2012
I have a HP w1907v with a slow internet. [code] I go on Command Prompt and type in 'ping <my ip> -t' and my ping is quite low. However when I go to something like YouTube, my ping goes super high! It jumps up to 1000. Also when I go on any website at all, my ping goes super high. It happens mainly on websites which have flash on it. I have a Belkin F6D4050 Enhanced Wireless USB Adapter. I thought it was the USB but it wasn't, because when I put the USB into another computer, the internet was fine. The ping didn't skyrocket or anything. It was constantly low.
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Aug 2, 2012
It should be known that this is not MY specific issue, it's a friend's issue... but I am posting it for him as I know nothing about networking. Don't worry though, anything you post here I will relay for him to do.Is this a wired or wireless connection issue?
Wireless
How to run and post an ipconfig /all output of the computer(s) in question for review.Here it is:
Quote:
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:Windowssystem32>
C:Windowssystem32>ipconfig/all[code]....
So here's the deal, my friend has horrible down speed, usually less than 1MB/s according to Speedtest.net, sometimes it hits 2MB/s. However, his brother's in the house have at least 17MB/s, which I can assume is their actual speed that my friend should have... however, he specifically does not.He had a very old wireless card that was installed on his motherboard (desktop PC) that I assumed was the issue upon him first telling me, and from the issues I was personally able to see. For example, he'd constantly disconnect... his internet would just die for him specifically, and then come back. His brother's never lost internet when he did.
After that, I figured his very old wireless card that was installed was just kicking the bucket, so I instructed him to replace it. He went out and bought a new wireless USB adapter, and then uninstalled the network card.Even after all of this, his internet is still poor in terms of down speed. HOWEVER, rather than his internet dying for a few minutes at a time every so often, his internet "stays connected" if that makes sense? For example, we'll be on Skype in a conference call, and his internet will be loading pages very slowly, and Skype will constantly show that it's going from "green - online" to "gray circle - connecting". During this, he's still in Skype, but it's very poor quality from him speaking, and laggy as well.
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Nov 5, 2012
I am connected to the LAN via ethernet cable, but internet access is terribly slow - cant even browse internet properly (work network uses a proxy to connect to internet - not sure if that is relevant). I would like to remain connected to the LAN via ethernet (to provide easy connection to intranet and mail exchange server, but for outside internet connections, I would like to use a mobile 3g connection.
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Aug 15, 2012
Normally use internet explorer 9, but I've tried Firefox and Chrome also.For some weird reason the Wi-Fi on my computer is super slow. My roommate has no problems at all. Same issue when only one of us are connected. What's really weird is that it's only on my home network the speed is a problem. At school and at other family members houses everything is working perfectly. I now use wired internet connection, and when I take a speedtest it is around 13MB, so the speed is pretty good.
I can mention that sometimes if my computer has been closed and the cable is taken out, when I turn the computer back on the Wi-Fi is suddenly working perfectly. Only for a while though, and then it's not working anymore. Has happened more rarely recently.I've been having this problem for around 7weeks now. When I first discovered the problem I tried to uninstall the latest updates (among windows updates), and it actually worked. But I want my computer to be up to date, so it's not a go to use those settings.
I have tried to reset the router to factory settings, but that did not work.We share internet with our landlord, so to privatize what we do, it's set up like this: Landlords modem -> switch in our apartment -> wireless router But that should not be problem. It's working on everyone else's computers. My mobile phone as no issues either;I've tried to update the driver on the wireless card, but it's up to date.
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Jul 21, 2011
I am in charge of taking care our small office network (about 25 PC's) and encountered a problem the other day. I got a call that nothing network related was working. I went to look at the switches/router and everything appeared fine. After some troubleshooting i found if i unplugged the switch and connected directly the the router everything worked prefect. Reconnected the switch, network goes down again. I assumed it was the switch at first but then did a walk around and a laptop was in a weird frozen state. I unhooked the network cable and everything started working away like it should.
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Jun 25, 2011
I have multiple laptops and a PC in my house all connected to Verizon's wireless/wired modem/router.My laptop's bandwidth ranges from 7-20 Mbps, while the desktop cannot seem to rise about 1 or 2. The wireless card for the desktop was a USB Wireless G adapter, in the process of trying to figure out the problem, i replaced it with a b/g/n PCI card. This did NOT resolve my problem. So in a fit of desperation, I reformatted the Desktop, and Restored the modem/router to factory defaults (in that order) neither worked.
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Sep 1, 2012
Soon after our router, modem been changed, all other computers are fine but my comuper become very very slow.
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Mar 22, 2011
I just realized that my internet is slow when my antenna is on top of my computer. I have a pci card with an external antenna connecting to it. If it's on top of my computer, my internet is slow, but if I move it three feet in front of it, it's fast. This makes me think that my computer is somehow blocking or conflicting with the signal. Is this normal, or is there something I can fix in my computer? Download speeds with the antenna on top are around 0.54Mbps, and if I put it as far away as I can, I get around 20Mbps.
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Apr 20, 2012
Shortly after creating a VPN connection on one of the computers, the network is turned off. The router remains powered on but no internet access or access between computers is possible. At first we put it to coincidence but after 3 times, we can't figure out what is happening.
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Jun 13, 2012
My Main computer (which has a wired connection to router) internet is running so slow, i mean so slow that i cannot even do a speed test, it keeps failing, im continuously getting server timed out messages when browsing, and to watch a youtube video of 1 minute long it will take about 5 - 10 minutes to stream it before i can watch it. However despite the above the two laptops and ipad work great, i have a braodband speed of around 16megs. Now here is everything i have done so far. After calling my ISP to se if it was their fault, which it turned out not to be, they got me to change all the DNS and IP settings to manual, they gave me all the numbers to put in. Again that did not work so i used namebench to find the quickest DNS servers for me, that didnt work ethier so i just reverted all settings back to automatic as they were before.
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Jul 15, 2012
If i use PPTP or OpenVPN does this encrypt my entire connection to the internet or just web browsing?
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