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.
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.
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.
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
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.
I'm trying to block two URL's over the entire network via my E4200. I'm having a heck of a time doing this, I loginto my router via the browser (the web setup) (because I think Cisco Connect on the Mac is about the worst software ever written.) And I go to the Access Restrictions page. There I understand I'll have to use the Internet Access Policy pane to make some more advanced settings than the Parental Control.
I enter a name for my rule, so far so good. Enable it. Go to the applied PC page. Open the page to enter MAC adresses and IP's. I go to the IP Address Range field and entere in the box numbered 01; 192.168.2.2 to 192.168.2.51 which in my case is the enitre network. Save the setttings and close that window.
I don't set Access Restriction to deny becasue that seems to block the entire network.
So I go the the Website Blocking by URL Address option and enter the URL I want to block.
I don't do anything wiht the the Blocked Applications since I don't want to block a specific service or application. So I click Save Settings.
And yet when I go to the URL I want to block it doesn't work! [URL]
I have a belkin N300 router that works decent most of the time, but anytime my roommate connects with her macbook pro the whole network becomes slow to the point of uselessness. If i block her computer using mac address filtering, the latency and download speeds are right where they should be, but as soon as i allow her back on ping jumps to 800-1000 and DL speeds drop to under 1mb.
I have many WiSM WLC's running 184.108.40.206. One WLC was rebooted few days ago but there was no crash file and nothing in logs say why this issue happened.There was a power problem at the same time the WLC rebooted (some switches and PE's was rebooted as well) but if it is a power issue why only one WLC inside the WiSM rebooted and the other WLC is still working fine with no reboot?I have 5 WiSM modules connected to the same 6500 box, only one WLC was rebooted which indicates a crash but no crash file registered for it.Is there anyway I can find the reason why that WLC was rebooted?
I have a the aforementioned router set up with one PC laptop connected via ethernet cable and two to five other devices (PC laptops, iPhone, iPad, Linux Laptop) connected at any given time. About once or twice a week the router drops the network. I can still see the SSID, but can't connect on any device. The wired laptop gets dropped as well. I tried to ping its IP, but it says the device is unreachable. The only solution is to walk upstairs and unplug the router, which fixes it every time until a few days later when it happens again. I've restored factory settings a number of times.
I wanted to know if I can somehow setup my network to use a proxy for all connected devices?
For example I can go into Firefox proxy settings and setup to browse using proxy. Is there any way to do this at the router or switch level to not have to configure every device individually I have a wndr3700 router and a HP procurve 1810g switch and am thinking of building a pfsense box.
I just got a new notebook that has windows ultimate, and whenever i turn it on it knocks off all the other PCS on the network and the printer, including the one the router is wired to. I can only get it to pick up all 4 devices when i go into the Lynksys program and click change password. But then the program locks up and i have to shut it off manually.
I already reset the router four times trying to get it to pick up all the PCs but it never works. I'm ready to toss the router and get something else. Are there any settings I can change or reset before this router becomes garbage fodder?
We have a NETGEAR ProSafe™ 802.11g Wireless VPN Firewall FVG318 set up at work with a static IP so we can do a Voice Over IP from our sales office.Everything works fine until I plug in a computer that is connected to our digital printer, then the PC stays on the internet for a while, then crashes the connection.Once I plug in the PC to the network, the rest of the network has issues.
I am dealing with three office networks, all three have the same conflict. The error messages I get all say there are two devices assigning ip addresses. As soon as I get the computers communicating with each other, two seem to crash overnight, I suspect due to the conflict. Here is the rundown on the networks. All are windows networks - the problem I am having is file sharing mostly and printing.
Network A: server OS is XP Pro - SP3, four workstations, XP Pro-SP3, Windstream DSL and Netgear Router. I have already bridged the router on this one, and it did not correct the conflict.
Network B: Server OS - Windows7 SP1, three workstations all XP Pro SP3, ISP is Clear (formerly clearwire). Router is the old wired Linksys befsr41 v4.
Network C: server OS - XP Pro SP2, ISP - Clear, three workstations - two are XP ProSP3 one is XP Pro SP2. I have had less trouble with this network, but I suspect the conflict exists here as well.
I have tried to get a static IP address from Windstream where I have had my worst problems, but cannot seem to get one. I suspect we have the least expensive service option possible, and are possibly using a service designed for home use as opposed to business, as someone told me recently that getting a static IP address can be expensive. Is this true? Currently all networks have DHCP enabled, and the routers are set up to use DHCP. My thoughts were to disable DHCP and assign ip addresses manually.
About a week ago, our network started to experience complete failure.
Router: Netgear FVS336.xxx Switch: Dlink DES-1024D (we have 6 of these switches in our building) Wifi Routers: Dlink DIR-601, Linksys wrt54g, wrt54gv2 Computersservers: 40x Copiersfax: 5x Wireless clients: (iphones, laptops) at least 30
All has been working together in harmony for many years.Fast forward to last week when my hell began with intermittent crashes.Not sure what's causing the problem.When it happens, everybody loses their internet, the ability to communicate over the network; ping tests won't respond to anything (including the router) that exists on the lan, even with a static IP against other statics.In visually inspection of the switches and router, they seem to be happily blinking away with no apparent issue (visually).The only way I've been able to fix the problem is by power cycling the router.About 1 second after doing that, we're back in action for 2-6 hours (very unpredictable).I never had to power cycle any other devices)
Steps I've taken in troubleshootingeliminating potential culprits:
Replaced the router with a spare (new) FVS318G
Replaced the power supply for the router (suspected because problem remained after router swap)
Replaced cable going from router to lan switch
Removed linksys wifi router from network (the router had needed power cycling weekly and was old. So I unplugged it)
Removed Dlink wifi router from network (I hate dlink routers, so removed it).I'm at a loss.
I work in a school department and wanted to hardwire two computers in my class using a workgroup switch. I only had one data port in my class. The tech guy told me the switch could cause the entire network to crash. Is that true? I thought a switch was just a passthrough device.
My brother has an HP G60 from 2009 with windows 7 home premium and 64 bit operating system. Whenever he turns it on and connects it to the internet, the whole network crashes. My xbox, ipod, laptop, and the main desktop (Which we also just changed to a Dell one.)downstairs all cannot connect to the internet. This lasts from anywhere between 2 and 15 minutes and it continues to crash the internet in about 15 minute intervals as long as his computer is connected to the internet. No other devices in the house cause this as I can have all of my stuff connected and nothing happens. We have a Linksys WRT110 router but I don't think that or the modem is the problem as we have changed both multiple times. This has been happening for about a year ever since my oldest brother gave my brother the laptop.
We are running an FWSM on a 6509 with a SUP720. Firmware 3.2(18), in MultiContext Routed Mode, with shared MSFC.Everything runs fine on this baby most of them time, however occasionally without warning and with no specific pattern the Primary node will fail (as in completely stop responding) and the secondary will takover as active. Two get the primary up agian, I reset the hw-module and then no failover active on the secondary to return the primary as active. However, after this event, I start to experience strange issues with connectivity. Certain TCP src dst combinations will just not work.
I work as an administrator for a small business (~30pc and a Windows 2003 R2 server ).Recently, we started to have problem with our lan, the network start to kinda lock-up randomly. For example, browsing folders is fine then you switch to one and the explorer window just do nothing (with a loading cursor) and after 4 second everything refresh and work again, then in word or any other program (sometime not even related to network files/folder) you press the save button and it do the same, do nothing for 4-5 seconds then refresh and work again.I'm positive that no process on the server take up enough CPU time to do that, it's not a per-pc problem since everybody is affected when the problem start and when I reboot the server it work like a charm for another day then the problem may restart the next day.Nothing show up in the event viewer of both PCs and the server and we can't find a correlation between the problem and high CPU/LAN usage on the server (at worse CPU is used at 10% and LAN at 2%).Our RAID controller and our SAS HDs are working flawlessly, we're in the process to change our infrastructure anyway but since I can refer to people that may know their stuff way more than myself I though Id ask here.We first though that our switches may be in cause but then why rebooting the server would be correcting the problem ?
We recently received the request to work on removing the entire NAC implementation from our enterprise. The major problem is that the security team in place now was not around when it was implemented a few years ago. Weve got about 1500 users, so its not going to be a small project to say the least. Fortunately for us, the team that set it up didn't do much with it. IT only really checks the user against AD and permits or quarantines the user/machine, that's it.
Is there a command that can show EVERYTHING that is configured on a router or switchSeems if you're looking to save enough information to completely swap out a device the run/start config isn't enough.Settings like VTP and MTU settings aren't shown in the config file ... there may be other configuration settings like thisAm I forced to just know to check those settings are is there a command that will show the running-config AND all these other settings that aren't in the config?
I see netmask as an option, but the ASA states "invalid option netmask." The ASA is running 8.2(2). OKC-PIX(config)# static (inside,outside) 192.168.99.0 access-l OKC2DAL ?
configure mode commands/options:
<0-65535> The maximum number of simultaneous tcp connections the local IP hosts are to allow, default is 0 which means unlimited connections. Idle connections are closed after the time specified by the timeout conn command
I'm reading the CCNA Sec book (554) and I've just finished a few chapters on CCP.Is the tool free? Can it be simulated in PT, or emulated in GNS3? Speaking of which, can the entire CCNA/CCNP Sec track be emulated in GNS3?
I currently have a BT Home Hub 3 router and an Ubiquiti Power AP N.What I am trying to do is use the Ubiquiti access point as the main device for all connections in my house (ethernet and wireless) so that I can use the QoS settings etc. I basically want the Home Hub router to play as little role as possible in the network except for providing the ADSL internet connection.I know I need to enable DHCP on the access point but everytime I do so the devices connected to the access point lose internet connection.(BTW I have an ethernet cable connected from one of the routers LAN ports into the access point's WAN port)
I have the E1000 Linksys Router and I am using a network cable to connect to my Sony Blu-ray BDP-S370. When I watch HULU through the player it kills the entire internet connection for all PCs. I have to unplug the router in order to restart it. Everything will also work just fine until the next crash.Here's the thing, I'll watch a bit of the show and see the commercials and the router will only crash when it comes back to the show. If I watched 100 commercials they would not crash, but as soon as it returns to the show CRASH. Restart and we watch again.
Since i got sky broadband it's always been running super slow, the amount of times i have called them is ridiculous. So i have just been looking around on the sky address to see if i can fix it and in my Attached devices i have, the pc, an ipod touch and an unknown device. I'm wondering if this has anything to do with the slow speeds and maybe it's somehow 'stealing' my broadband. I've read a previous post of the same type but that wasnt for sky. i ran the ipconfig/all into CMD
I just got this av to cat5 converter [URL]? and was thinking i could use a router on each end so it could be wireless. But the way they work the router does not see the converter when it is plugged in.
This is 1st attempt at home networking:win xp pro to win 7 ultimate.can get both devices to ping and receive both by ip address and computer name.both devices seen in each others workgroup view. cannot open either device from the other device.file and printer sharing is on on both machines.