Lan Attacks

[pushkar_love4u () yahoo co in]

Well i  want to knw how we can attack the internal network from the outside world.How the internal address are useful 
for attacking the network from outside internet world.Suppose 
our college has a staic ip address and it uses dhcp for addressing the newtork so i want to know how we can attack the 
network frm outside world.sorry for asking stupid quesions here but plss suggest me something about how the internal 
address can be attacked frm outside network Thanks in advance
pls help me in this and suggest some reference

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