How can I tell if someone else is using my wireless net service?
829747
ignore ALL the people above\n\nlog in to your router (check the manual on how to do this)\n\nthen look for a option which shows you how many MAC numbers are logged into and using the router.\n\nFirst find out ur own MAC number by the following method:\nClick "Start", choose "Run...", type CMD and click OK, then type ipconfig /all in the Command Prompt window that appears. The number under physical address is the MAC address. If multiple IP are displayed, you should look under the label "Ethernet adapter x", where x is the name of your connection (which is Local Area Connection by default).\n\n----\n\nIf you see more than one MAC address that isnt urs then it means that someone else is using ur wireless service.\nYou can block others from accessing your router if you set your router to be a secure connection by using WEP. Again, check your router manual for this.\n\n\nHope this helps\n\nPS: MAC numbers are fixed. IP addresses can change every time you can log in to your router. This is the reason why i say that look for particular MAC numbers
1164690
check your network/proxy settings
535553
Do a "WhoIs" search on Networksolutions.com.  You can find if a particular domain name is being used or not
175304
Access your wireless router and you should have an option to look at the DHCP Client list.  It will tell you how many computers and what the computer names are that are connected to your network.  If any computers are not yours then someone is connected to your network.  As for who they are in particular...unfortunelty unless they have files shared that give away their name or who they are there is no way to tell.
1072580
Yes and No.  Many internet service providers (ISPs) don't like connection sharing for free.  On the flipside, many ISPs don't monitor it or don't have any policies against sharing the connection.  However, if you're sharing this connection without your Neighbor knowing, this can be illegal being that your Neighbor is paying for the internet service (provided that you're not sharing your connection with your neighbor).\n\nSo I would check with your Neighbor or your ISP (depending on who is sharing what with who) before doing anything.  Fines and possible jail time isn't worth the risk of surfing the internet freely.
688973
Notify your network administrator
851430
This is a neat little trick I used to do, but you might have to be a little computer savvy to pull it off.\n\nFirst, open up a command prompt [Start Menu...Run...type 'cmd'...it will bring you to the black screen]. Type 'netstat -n' and it should show you a list of ip addresses you are currently connected to.\n\nNow...get that person to direct connect to you. Type 'netstat -n' again. There should be one extra ip address. This address will be the ip of the person with whom you're directly connected.
681231
It means you have someone at a minimum using your wireless connection.  At the worst they are using your wireless to hack other sites and/or steal information about you for identity theft.\n\nWhat you need to do is secure your wireless network.  Take the following steps:\n1. Change the SSID of your wireless access point from the default.\n2. Change the default administrator password for your wireless device\n3. Enable the highest level encryption supported by your device.\n4. Enable MAC filtering from your wireless device
111249
You will have to log into your Access Point to view active client connections.   I suggest you use WPA security, so you do not have to worry about someone hijacking your connection.  I could help you further if you provide me a make and model of your access point\n\nScottsdale, Arizona Computer Repair & USA Phone support\nhttp://www.AFFIRMATIVE-COMPUTER-TECHNICIAN.NET\nAffirmative Computer Services \n*Quality* Computer Repair Services
718546
Use "netstat" command. Can show what ip's are conneceted, what ports are listening, etc.
729991
By hacking\n\nor u could ask the person who own the wireless for it
608185
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.
422080
Those are probably control packets from your provider that they use to determine your status. Unless someone else is connected to your cable or modem, they shouldn't be able to steal your bandwidth. A wi-fi network would allow people to access your connection if you haven't set the router to prevent unauthorized access.
323511
Possibily wireless data link or direct setallite link.\n\ncheck out with your ISP that you are willing to do something like that he will give you a perfect idea about what's going on in their scenario and how are they doing it.
315529
Someone living near you (within 100 metres) also has a wireless network. If you set yours up, you should be able to choose which network you want - make sure you give your network a meaningful name so that you can recognise it.\n\nIt would be worth finding who this person is, and telling them to enable wireless network security, and that you found their confidential information by mistake, so that they don't have malicious people using that information. And make sure you enable security on yours too.
246582
I suggest you LOOK@LAN it's a very good network scanner. It deeply scan your LAN and list all computers with all active services on them.
685266
go to tools, internet options, connections, and make sure it is checked never dial a connection, click on lan settings and make sure automatically detect is checked