[solved]networking, local area network.

hello everybody,
i have one local area network with wi-fi, and used by 10-15 computer. every komputer registered to mee. some time illegal computer conected to my network. my question is; what kind of software can use to block ip address or mac number from illegal computer accessing my network ?
please help me fren
Answer #1
Enable encryption in your router.
Answer #2
You can set a password for your network can’t you?
for linksys i think.. go there and create a pass
http://192.168.1.1/
Answer #3
Could you provide the router’s brand and model? Also, have you checked the router’s console for a MAC address filtering option?
Answer #4
i was set password, but my client sharing with other people
my router is d-link wireless g adsl2+router type dsl 2640T
Answer #5
If you have set to WEP set to WPA/WPA2. Don’t forget to save changes after you change settings.
Answer #6

This should do it.
Answer #7
thx .
Answer #8
You are welcome, .