Has anybody read The Illustrated Network: How TCP/IP Works in a Modern Network by Walter Goralski? url...I was thinking about picking it up. Does it offer anything new to a student studying for his CCNP?
View 9 RepliesII bought a DIR-655 (not sure what rev I have)router and noticed my NAT had changed from open to strict.shen playing Modern Warfare 3 on the Wii. I didn't have that problem with the DIR-615 I replaced. I tried to set it up in the DMZ and I tried the port forwarding and neither of them worked. I am not ruling out operator error. I've tried to piece together the information from several different forums and websites but all are slightly different.
View 5 Replies View RelatedMy laptop is equiped with an old WLAN adapter, which handles G standard maximum.
How do I replace it with a new compatible WLAN adapter to serve B/G/N all?
this computer was working on this router no problem. computer crashed and noiw computer is fine i connected it to my cable from ny desk top comutyer and works fine. It just cannot hook up to the wireless connection?
View 1 Replies View RelatedHow Stuff Works "How Network Address Translation Works"."This is where NAT (RFC 1631) comes to the rescue. Network Address Translation allows a single device, such as a router, to act as an agent between the Internet (or "public network") and a local (or "private") network. This means that only a single, unique IP address is required to represent an entire group of computers." so let's say 6-7 pc's can have access to the internet using the same IP. doesn't this causes any problems? what if one of those pc's was used fore doing something illegal? how can they spot it later on? or what if 2 or more pc's access (from that subnetwork) access the same website with the same IP?
View 3 Replies View RelatedI have Windows 7 PRO and since I bought it I have wierd disconnects. The network works for like 2-3 minutes and then disconnects for 5+ mintues.
View 5 Replies View Relatedi am pretty good with computers but this problems got me stumped, my old desktop dell deminsions 4400 will not connect to my home network. So I first reinstalled the driver and plugged the wire in and like magic i had internet. so i took it up stairs, no internet connection. so i whipped out my handy dandy laptop and plug the wire into the cat5 port and i had internet. so this is telling me the wires in my walls are working, my router and modem are working, and my pc is doing something crazy when it changes elevation. I'm about to take it downstairs to see if itll work again
View 2 Replies View RelatedWe have a lan connection using only switch in a department. No router, no internet at all. Every body is assigned manual lan ip like 192.168.0.1, 192.168.0.2, etc and subnet 255.255.255.0, to access some resources between the computers. Today we formatted one computer in the lan network and changed it to windows 7 from xp, then put manual like before like 192.168.0.x but now it shows "unidentified network" though it works. I mean even though it shows unidentified network it works and it can access the other computers.I wonder then why it shows unidentified network now, before formatting in xp it was showing connected or enabled. Even now in other computers, it's good.
View 1 Replies View RelatedWe have a legacy client/server application, an OCR system. The server runs on Windows 2003 R2. We have client machines running happily on Windows XP.We have for a while had problems with getting the clients to run on Windows 7. Some machines wouldn't work, others worked intermittently, one worked consistently. By a process of elimination I discovered that the one working consitently was on a desk where we had put a small 8 port 3Com gigabit switch on the desk to give us more network ports. If I move this switch to any other desk to one of the non-working clients and connect them using the same uplink but going through the desktop switch they start working.The XP clients work fine using any of the network switches. None of the 100+ devices on our network (desktops, laptops, VoIP phones, printers etc) are showing any other signs of network issues, only this OCR application. The application was last updated in 2004, so was not designed for Vista or 7, essentially the vendor is no longer updating it, but say that as far as they are aware it works with Windows 7.why adding a 3Com 3c1670800B switch between the client and the rest of the network should make the application work with Windows 7. Whilst I have a workaround for the problem I'm uneasy that I don't understand the root cause, and if I was to press ahead and move the client machines to Win7, the whole system depends on a single piece of kit that's now discontinued and I only have one of. It all seems pretty counter-intuitive to me that an application should be sensitive to low level network hardware.
View 7 Replies View RelatedMy cable modem and router are in a closet. From there, wires run through the house to multiple locations. One of the locations has had a wireless access point (WAP) installed which has worked flawlessly. I want to put another device at that location that doesn't have wireless capability, so I tried to connect a switch. The switch does not connect. When I disconnect the cable from the WAP and plug it into the switch, the light on the switch port that would indicate a connection does not come on. When I then connect the WAP to another port on the switch, the light on its port does come on but it does not see the router. I've tried multiple cables (I even tried a crossover cable) and I've tried a second switch with the same result. When I plug back into the WAP, it works fine again. The switch works fine at other locations in the house.
One more thing - When I bought the house, the wire to this particular location was unterminated. I had never done any wiring before but I decided to try to do this myself. So, I read up on the process and bought the necessary tools. When I stripped the wires, I found that the twisted pairs were not just twisted (as they were in the patch cable I practiced on) but each pair was in a single strand of insulation (I'm not sure exactly how to describe this but there were four strands of plastic, each with two wires packaged inside.) I didn't know how to separate the two wires that were packaged together so I wired the connectors with all four color - color/white pairs next to each other. I know that's not the standard. But from what I read, as long as I wired both ends of the cable the same way, everything should work. And in fact, it did for connecting the WAP.
I plug the Lenovo in to the Ethernet cable in my office, get link & data transfer lights, connect to the internet,everything works.Bring it out to different office (it's replacing an old XP machine, which connects on the cable I'm about to mention)Plug it in to ethernet, no lights, Network Cable is Unplugged.Plug cable back into old XP machine. It connects.
Bring out a Win7 Home Premium SP1 laptop. It connects.Plug back into Idea center, nothing. Drag idea centre back into my office. It works again.The Idea centre is new, so it's never worked on this area before. Also, I have 3, and they're behaving identically. ALSO, sometimes when I plug in the Ethernet cable the green and yellow indicator lights will blink once at me, and then never again.
The cable's good, works with 2 other machines. The port/NIC card is good, works in my office, the only difference between the two locations is that I have an extra router in my office that I don't have in the office the Lenovo is going in, so it MUST be something in the settings, but I can't tell what's different between the machines that work and the Lenovo.
I have a Belkin G wireless router. I have connected a Windows 7 PC using wired connection through Ethernet port.I've also connected my Windows XP PC through wireless connection. And plugged in my internet cable to the Router.Now I am able to access internet on both the PCs but I couldn't setup a network between the two computers for file sharing.
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connect new computer running windows 7 to small peer to peer network...modem to connect to interenet is speadstream 5660...network works fine but cannot access internet...i works great in my office with a different modem...i can access the windows 7 computer remotely using go to assist also...trying to find out if there are issues with windows 7 and the speedstream 5660 modem...
View 2 Replies View Relatedi have the qwest q100 modem and my freind happened to havea qwest q1000 modem and when i just connected the q1000 the internet doesnt work. what do i do?
View 2 Replies View RelatedI have a desktop pc and my connection to the internet is via a router. I cannot get my nic card to work but only after a reboot! When it first boots up, the card isn't even shown on the device manager. After a reboot, everything works great. Already tried another nic card but it cannot get an ip address and the connection shows a yellow exclamation mark with "no or limited connectivity!"
View 7 Replies View RelatedI'm working on a friends laptop that used to connect wirelessly to their network no problem, and all of a sudden it would no longer connect at all. It a 5 year old Gateway laptop running Windows XP Media Center. It just hangs at "Acquiring network access" and never connects. I'm pretty sure it's their network because it works on my home network perfectly, connects and stays connected.
Can you give me some pointers to do to the laptop and/or the network? I normally would start fresh with the wireless network, but they have a bundle package of AT&T (internet, phone & TV all-in-one) so the router is branded AT&T and don't want to mess any of that up.
Acer Aspire 4520 Wireless network no longer works.
The light on keyboard is lit up but when pressed, it says No Device.
Went out a long time ago and I quit using the laptop. Borrowed external adapter which works.
No updates found for driver.
MY ISP is AT&T. I have their Westell DSL modem, with a bridged connection to a Linksys wireless router. The router is connected via ethernet to a dead computer: a 7 year-old Dell desktop that will boot up but shut down right away. I have been able to connect multiple laptops wirelessly to this network. I thought an ethernet connection was required in a home network such as mine? The cable has been plugged into a dead computer for several months and frankly I'd like to get rid of the desktop. What exactly is the ethernet requirement - just to be plugged into a port? Could I theoretically just yank the ethernet card out of the desktop and use it instead of the whole dead system?
View 5 Replies View RelatedI have recently changed a couple of our companys office routers over from a netgear vpn router to this, all has gone well with the cisco router providing much better speed and reliablilty... But....
I have one little problem, at one of our offices they have a brother printer that has a scanner built in, since this change over the scanner does not seem to want to work,
as far as i can guess the router is blocking communication to the scanner, printing is working fine. is there anything that I need to enable or add to the settings on the cisco to get this working? I believe that the printer is using some kind of multicast to connect to the PC's
I bought a DIR-655 for my parents after their old router died in a planned power outage. It's a rev. B1 model running the 2.00 firmware. It worked fine initially for a day or two with great wireless coverage, even in the previously low-signal spots in the house.Then the problems started. The router now has trouble loading any website. What you get is instead a page returned from the router saying something along the lines of "network unreachable, please check you internet settings" (I will go there today or tomorrow so I'll update the post with the specific error). Refreshing the page a few times sometimes makes it load, but extremely slow and then the same thing happens again a few moments later. The same thing happens on both wifi and through the router's LAN ports. If I connect a computer directly to the modem it works just fine, as it has always done before getting this router.I have disable QoS, NAT endpoint filtering and the firewall (SPI). I have also set the WAN port speed to 100Mbit/s in the router, to match what the modem is set to (also had issues with the default setting).
View 7 Replies View RelatedModel wrt54gsWindows xpI got the wireless network setup and password protected and my computer and phone can sign o the wireless network, but when I try to go to a website it doesn't work. If I connect te computer directly to the modem then it works.
View 2 Replies View RelatedRegion : Poland
Model : TL-WR941ND
Hardware Version : V3
Firmware Version :
ISP :
I have a problem with files sharing via wi-fi. I can not share files over the network using wi-fi connections. While the network is the cable connection sharing is available. The network also acts as one computer is connected by a cable to the router and the other via wifi. But if the two computers are working through wifi network does not work. Are there any settings in the router, which can cause blocking calls via wifi?
I'm trying map the USB hard drive connected to my EA4500 router as a network drive in Windows 7, and it works perfectly until I enable secure folder access on the router.
After enabling secure folder access, and not changing any other settings on the router I first unmount the drive since it was set up without credentials and doesn't work that way any more. When I try to remap the drive I use the same address, but select "Connect using different credentials" When it prompts me for the log in info I try using the router admin account, but it fails to connect. Windows network diagnostics tells me the device refused the connection. I proceeded to set up an account on the router under the folder access settings with the same username, and password I use on my computer, and tried to connect it without checking "Connect using different credentials" (And typing them in manually if that matters) with the same results.
Even with secure folder access enabled I can still reach the drive just fine by typing "ftp://192.168.1.1/" into file explorer. It prompts me for a username and password, I put in the admin credentials, and I'm in. Even the account I created with the same username/password as my computer works this way.
After disabling secure folder access everything works perfectly fine again... I would MUCH rather do this with it though.
Following these directions: [URL] When clicking the browse button the router shows up when secure folder access is disabled, but does not after it is enabled. I've looked through my windows sharing settings, and haven't noticed anything that should cause problems, pretty much everything is enabled. I've also tried turning off my firewall with no success.
My provider is Time Warner and I have their Wideband 50 MBs. This requires me to have a Motorola Surfboard router/modem (so no stand alone modem)
1. No applications such as google talk, steam, my ftp client or basically any computer application that requires internet for some of its functions. (all on my desktop PC connected to LAN)
2. The internet would partially work. I could get to some websites but it would often fail to load
3. Other computers are able to connect to the LAN and it work without an issue
Connecting with a LAN cable to the router works 100%, and I can get access to the router's IP-address, but when trying to connect to wireless, it asks for the WPA key, and I fill it in, but then gives an error saying "Can't connect to wireless network: *network name here*" (This is translated from Dutch to English, so it might be a bit different on an English computer).
View 3 Replies View RelatedWhen I try to upload one file through FTP client to a server, it shows error similar to "you are disconnected by remote host" or something like that. It happens only in work place. When I try the same from home it connects successfully. What could be the problem?
View 1 Replies View RelatedI just recently bought a Telewell Wlan AP wireless access point and my problem is that I can't connect to the internet with Lan, hence can't get connection on my desktop. My laptop however works fine with wlan.
There's a wall socket which connects to a bigger student local network, I can connect my desktop to it directly and it works so there seems to be nothing wrong with my computer. I've had 2 routers before this, another Telewell that worked flawlessly and a Buffalo that cut the connection every now and then but didn't have this kind of problem.
I have the router plugged into the wall, set to get a dynamic ip (as it should be) and it does find Wan-side ip-address and dns-servers, as I could connect through wifi. So there doesn't seem to be a problem with that either. But for some reason Lan doesn't work. I can access the router through Lan, dhcp is on and I can see my desktop on the routers client list.
My pc will not pick up the internet, my iPad does through my wifi. I called my provider and they said my connection is fine, they mentioned not using a USB cable but when I take it out my wifi won't work on my iPad. My pc keeps saying not connected to the internet. I have a modem and a router, do I only need 1 maybe?
View 1 Replies View RelatedBasically I have a bunch of computers that are being routed through a specific gateway in order to access a web page that is hosted internally on a separate subnet. I set up static routes on all of the computers, and they all work... except one.Here's what a route print -4 looks like for a working computer (Windows 7):
Code:
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Interface List
14...xx xx xx xx xx xx ......Broadcom 802.11n Network Adapter
11...xx xx xx xx xx xx ......Realtek PCIe GBE Family Controller
1...........................Software Loopback Interface 1
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Both of these stations are running Windows 7.So essentially what I am trying to do here is route all traffic to the 10.zzz.zzz.0 subnet through the 10.xxx.xxx.147 gateway. Everything else should go through the 10.xxx.xxx.230 gateway. This is the intended behavior, and again it is working everywhere but that one station.
My computer worked fine on the eithernet, but I had to move it to a different room and now it won't recognize ANY WIFI connections. I know the wifi is working because I have laptops and phones connected to it. the computer is only 8 months old. It's an HP Pavillion AMD Phenom II 820 Quad-Core Processor, Windows 7 64 Bit, Wireless LAN 802.11b/g/n.
View 19 Replies View RelatedHad talk talk router upgrade yesterday and everything worked fine. Today wifi works on MacBook but not on PC Windows xp3. It appears in the list but won't connect on pc. Can connect to an unsecure weak connection on the list but it's not mine. Been in to router to chnage channel from auto to 11 as an eg
View 2 Replies View RelatedMy computer is connected via ethernet cable. the internet works fine. But it says that I am Not Connected and that there are no connections available.I'm not sure what specs you guys would need to look at tobut just post telling me what
View 3 Replies View RelatedI am trying to add some APC UPS Devices into CiscoWorks LMS 4.1. For example i have three APC Smart UPS 5000 RT RMXLI with management cards AP9619, i have chosen Device Type as "Smart-UPS RT 5000 XL" in Nom-Cisco Devices list, but when i am creating Invetory collection job, i`m getting status failed for this devices and the error is: "RICS0001:Internal Error,unable to process the collected data from the device"
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