I use a wireless laptop and I share an internet connection as well as a router. how do I find out if someone o
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The router needs to be secure and issue a password so that only other PC's or laptops with wireless connections can access the network using the password.\n\nUsually there may be 4 or more channels each with its password.\n\nOn the wireless laptop click CONNECT or VIEW AVAILABLE NETWORKS that will tell you if they are secure or not - if you connect to a secure connection you MUST have a password.
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make sure your laptop have the same setting with the router\n1. the channel\n2. the wep key (the password you got probably)\n3. the ssid \n4. the router is not filtering out other machine by MAC address, otherwise you have to give neighbour your wireless MAC address to add in the router setting\n5. use release button and renew button on router config. page to assign address.\nIf your laptop detects signal, go to start run type "cmd" ok, then in the black window type "ipconfig /release" enter, then "ipconfig /renew" enter you should get connected.
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get in to your router. type your router address at ur web browser (eg.192.168.1.1). usually your router can show you how many computer are connected to it. Or use a sofware like Network magic. u can found it at www.downloads.com
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Your wireless router sends the signal as far as it can, anyone with a wireless card can pick up that signal if they are within it's range. If you do not want them to piggy back off your wireless internet you will have to access your router and encrypt the signal coming out of it so that no other computer except yours will understand it's signal. To access the router click the start button and click the run option. From there type in cmd. A black window will pop up, In that window type ipconfig and hit enter. Look for where it says "Default Gateway" Type that number that it gives you into your internet explorer address bar and it will open your router. From there you can encrypt your wireless signal. Be sure to put the password it gives you into your computers that are using wireless or you will not be able to access your own internet once you encrypt it.
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look on the internet for "traceroute"\nit allows you to trace all the conncetion your computer makes to another computer\nping means that you can test to see whether a computer is on the internet or not.
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the computer ID or IP address is the same as another computer on the network
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You could also do a service scan of the IP address to see what services are being ran on that IP address, or what domain name may be associated to that IP address.\n\nYou can do a lookup of the information about an IP address at http://www.domainwhitepages.com
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Yes each computer wireless card or ethernet card has a mac address.  they can trace from where ever to the router then check the router for the logs of the ip address it has gave out then look for the mac address of the last time the ip address was used.  Then just wait till you get on it again you can only be so far from the wireless router. :) Don't do anything shady :)
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Yes, there is. Install an application like nagios (freeware) or Look@Lan (freeware). Have that monitor the IP address of your router.\nBut it's usually not easy to understand all traffic that is going on in your network.
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They can log your externally exposed IP address.  This wont be the same address you see if you're behind a network router (linksys) or something.  If you'd like to know your IP they see, go to www.whatismyip.com.  If you leave a message or comment, if they're smart, they'd be able to associate your page hit with that message time and from then on out, thye'd know that IP address was you.  This might be a problem if you're using dsl, as thats a static connection, and your IP would always be the same.  However, with cable, it uses DHCP so your IP should change pretty frequently i blieve.
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Almost all wireless routers have a utility screen that allows you to "see" the wireless connections that are present. You can always ping your networks broadcast address to invoke activity from all "listening" devices, and then check the computer arp table to see a list of devices.
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First and foremost, you should probably secure your wireless network. WEP is not particularly secure, but will prevent at least casual intruders from gaining access to your network. WPA is a bit more secure. \n\n1. There is no easy way to figure out who is using your wireless network. if someone is using it, the computer will probably be close (300 ft), but if you are really interested, you will need something like a wireless packet sniffer installed to see what kind of traffic is flowing through your network\n\n2. An intruder will be able to see all of your information if do have not secured your network using something like WEP. These days most web sites use HTTPS to encrypt credit cards and passwords (which would mean that the intruder cannot see them), but you should still secure your network.\n\n3. Zone alarm will potentially protect you, but not if it is installed between your DSL / phone line and your wireless access point (remember that if the intruder can get into your wireless network, they can directly connect to your computer). There are a number of changes you can make to minimize the risk of somebody gaining access to your computer (e.g., if you are using windows, don't enable file sharing, make sure the latest patches are installed, etc.), but generally there are always some holes a determined intruder can use to get access to your data. Again, best way to prevent this is to enable wireless security....\n\nMore info:\n\n"Sorta liek creating a decoy unsecured network,tempting an intruder and then monitoring his tracks as to what he'll be upto wid such a network.Will i be able to gain the info of his computer username.So basically, does the intrusion work both ways wen i have created the network.? thanks again. cheers."\n\nYes, and this is called a 'honey trap' system (http://search.yahoo.com/search?p=honeytrap+security&prssweb=Search&ei=UTF-8&fr=ytff1-&x=wrt). Using a sniffer, you can try two things (based on his level of sophistication):\n\n1. watch what the intruder does, and hope that by passively observing the traffic, you get some insight about identify, etc.\n\n2. actively try to break into the intruder's system, really doing the same thing to him (though not sure how legal this is)\n\nHope this help...
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Having a wireless signal and IP does not necessarily mean that you should have internet connection. \n\nIn fact, you can have a wireless router at your house without even having a DSL or any sort of internet connection. all this will allow you to do is see your computers on the same network within your house (if you have multiple computers).\n\nTo address your problem there are a couple of things you can check. I'm going to assume that you have a DSL connection with a plan that has dynamic IP that is always connected. \n\n1- Make sure that your DSL modem connection is correct:\n  a- Check that your phone cord (RJ-11) is plugged in to your phone jack (in the wall), and into the phone input of your modem.\n  b- (if it's a DSL connection), ensure that you have installed the phone line filters on all other phones in your house (instructions are with your DSL modem package, and filters would be in that package as well)\n2- Ensure that your modem is turned on, and it has Data link, Sync  (And obviously ... power :) ) \n3- Ensure that you have your network cable going from your modem Data port (RJ-45) to your UPLINK on your router.  (sometimes this port is called : Internet on some routers.\n4- Check your router configuration to make sure that it's setup to grab the correct IP configuration from your ISP (internet service provider) . if it's a dynamic IP, all you have to do is setup your WAN setting on your router to DHCP , and it'll do the rest. if you have a STATIC IP, then you probably have to look at the instructions that your ISP sent you when you signed for IP, Gateway and DNS information. \n5- If you are already on the wireless network, you can verify by check your laptop IP. sometime your link says that it's connected, but your IP will something like that 169.254.1.1 , etc ... that's not a real IP, and therefore will not allow you to connect to the internet. \nIf you left your settings on default on your router, most routers have an IP similar to this: 192.168.1.x \nso your laptop should have an IP that is in the same format, the last number would be anywhere from 2 to 254.\n\nYou can check your laptop IP by going to start /run ... and type cmd, and press enter, then on the command prompt, type: ipconfig and press enter. \n\nThese are basic steps to troubleshooting. Please feel free to email me if you're having more issues, or your issue is not addressed in these instructions.
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You need a cross over cable to connect the two together, but this not needed since you have the wireless router. If you shared the folder thne you should be able to see it by typing &#92;&#92;TheComputerWithTheShareName&#92;WhatEverYouNamedTheShare If you can't see it thne check your firewall settings on the computer with the share. You may want to temporaily drop the firewalls jsut to make sure they are not causing a problem.\n\nYou don't really need a share since you can use the hidden share &#92;&#92;ComputerName&#92;c$ ( replace the c with the drive letter the files are on. You will probably need to enter a password using this method, juct type it like computerName&#92;UserName and your password for the machine you are connecting too.\n\nhth\nBruce
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If you are running Windows XP, click Start, Run..., and type in cmd in the dialog box that appears.  This will open a DOS session.  Type ipconfig at the command prompt that appears on the screen and press <Enter> key.  You will get a few lines of results, one of them being your IP addr.\n\nNow, if you have a router between you and and your cable or DSL connection, then the IP address you see is what the router is assigning to your computer.  The outside world cannot see that address - they see the address your service provider has assigned to your router.
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Simply go to Start>Network Places or simply go to Windows Explorer (Windows button + E on the keyboard) to view Network places.   It will provide you with info on whcih computers are connected to yours.  This usually works if your computer is connected to other computers on a LAN or Ethernet.
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If you are using a router it should have a log capability.  Log onto the router and check the log.\n\nIn addition the previous answer mentioned keyloggers and goggling.  However I suspect they would be detected by an antivirus.\n\nI would also suggest that you look for any thing spying on your machine.  Kids are pretty smart.