Network Message over WiFi

[lobo_pac]

is there any way to send a message to a computer linked to your wifi network? for example, if i have my network open and i see a computer connected to it that i do not recognize, is there anyway to send that computer a message?

vice versa, say i am connected to somones open network and they may or may not be aware that their network is open....can i send them a message warning them that i am able to access thier network?

i recently set up a wifi network and while i do not leave it open, i have driven around the neighborhood and connected to people's networks.....for internet access only. i have no knowledge on how to hack into thier computer, but i thought i could at least let them know that someone could steal thier bandwidth.

thanks.

[DVNT1]

Yes, in some cases.

Get Airsnare, this does what you want automatically after configuration.

http://home.comcast.net/~jay.deboer/airsnare/

[lobo_pac]

nice. exactly what i was looking for. thanks dvnt1. anyway to do the opposite, send someone a message and let them know thier network is open?

[icomputer]

try the dos command, net send to their IP...

[lobo_pac]

how do i find thier ip? can i use the dos command to send it the other way, ie: from my computer to a computer connected to my network? again, how would i find thier ip? i only see the mac address to tell somone is connected.

[washe]

Well actually sending a message to their personal network could be considered a hack attack......

but you can do the following you can check what houses have their networks open.... you can try to sell a cheap service helping them to having more security.... you can show them in your pc that their network is open....