I wrote a small vb program, to detect who is online using Yahoo Messenger. The idea is quite simple, detect open port 5101 tcp - yahoo server, then i returns true. Might help network administrator to detect whose chatting in the network.
while ip x.x.x.0 to x.x.x.255
if port == 5101 then
msg = online
else
continue loop
end if
Input your ip range
YM Scanner in action
while ip x.x.x.0 to x.x.x.255
if port == 5101 then
msg = online
else
continue loop
end if
Input your ip range
YM Scanner in action
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